From f1c9b08cf322e4268a0a31ae9b5d75bf3cfce7d1 Mon Sep 17 00:00:00 2001
From: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Date: Thu, 21 May 2020 17:31:25 +0200
Subject: [PATCH] fix(curriculum): add isHidden: false to challenges

This includes certificates (where it does nothing), but does not
include any translations.
---
 ...ive-to-images-for-visually-impaired-accessibility.english.md | 1 +
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.english.md
index cadea225d1..a8e0e721c4 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.english.md
@@ -2,6 +2,7 @@
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 title: Add a Text Alternative to Images for Visually Impaired Accessibility
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cPp7VfD'
 forumTopicId: 16628
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.english.md
index 16be4f16f2..ccbf2a4f9d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.english.md
@@ -2,6 +2,7 @@
 id: 587d778b367417b2b2512aa8
 title: Add an Accessible Date Picker
 challengeType: 0
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 forumTopicId: 301008
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.english.md
index 3635c31af8..7473e10734 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.english.md
@@ -2,6 +2,7 @@
 id: 587d778f367417b2b2512aad
 title: Avoid Colorblindness Issues by Carefully Choosing Colors that Convey Information
 challengeType: 0
+isHidden: false
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 forumTopicId: 301011
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.english.md
index dbed30c7e7..157efee3b6 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.english.md
@@ -2,6 +2,7 @@
 id: 587d778f367417b2b2512aac
 title: Avoid Colorblindness Issues by Using Sufficient Contrast
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cmzMEUw'
 forumTopicId: 301012
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.english.md
index 3ba07dcb6d..6a93d2e3d7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.english.md
@@ -2,6 +2,7 @@
 id: 587d778f367417b2b2512aae
 title: Give Links Meaning by Using Descriptive Link Text
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c437DcV'
 forumTopicId: 301013
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.english.md
index fce22783b8..a607fdca46 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7789367417b2b2512aa4
 title: Improve Accessibility of Audio Content with the audio Element
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cVJVkcZ'
 forumTopicId: 301014
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.english.md
index 31dec12039..47c411a3b5 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.english.md
@@ -2,6 +2,7 @@
 id: 587d778a367417b2b2512aa5
 title: Improve Chart Accessibility with the figure Element
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cGJMqtE'
 forumTopicId: 301015
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.english.md
index 98791b7b6a..a624d3ef57 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.english.md
@@ -2,6 +2,7 @@
 id: 587d778a367417b2b2512aa6
 title: Improve Form Field Accessibility with the label Element
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cGJMMAN'
 forumTopicId: 301016
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.english.md
index 52459961e3..2e906cd0dc 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.english.md
@@ -2,6 +2,7 @@
 id: 587d778e367417b2b2512aab
 title: Improve Readability with High Contrast Text
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cKb3nCq'
 forumTopicId: 301017
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.english.md
index 5438dd2f88..64b7d00e59 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.english.md
@@ -2,6 +2,7 @@
 id: 587d774e367417b2b2512a9f
 title: Jump Straight to the Content Using the main Element
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cPp7zuE'
 forumTopicId: 301018
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.english.md
index 45983d0e9d..df060a3331 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.english.md
@@ -2,6 +2,7 @@
 id: 587d774c367417b2b2512a9d
 title: Know When Alt Text Should be Left Blank
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cM9P4t2'
 forumTopicId: 301019
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.english.md
index ce899c3abe..bdf9f1cb2b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.english.md
@@ -2,6 +2,7 @@
 id: 587d778d367417b2b2512aaa
 title: Make Elements Only Visible to a Screen Reader by Using Custom CSS
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cJ8QGkhJ'
 forumTopicId: 301020
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.english.md
index ba4f2fb881..ed7aba96b3 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.english.md
@@ -2,6 +2,7 @@
 id: 587d7790367417b2b2512aaf
 title: Make Links Navigable with HTML Access Keys
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cQvmaTp'
 forumTopicId: 301021
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.english.md
index 4dad3c6498..63beb2ada7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.english.md
@@ -2,6 +2,7 @@
 id: 587d7788367417b2b2512aa3
 title: Make Screen Reader Navigation Easier with the footer Landmark
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/crVrDh8'
 forumTopicId: 301022
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.english.md
index 18bc8de59d..8583a60444 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.english.md
@@ -2,6 +2,7 @@
 id: 587d7787367417b2b2512aa1
 title: Make Screen Reader Navigation Easier with the header Landmark
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cB76vtv'
 forumTopicId: 301023
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.english.md
index d99b3a1629..fef2290bc5 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.english.md
@@ -2,6 +2,7 @@
 id: 587d7788367417b2b2512aa2
 title: Make Screen Reader Navigation Easier with the nav Landmark
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/czVwWSv'
 forumTopicId: 301024
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.english.md
index 9672430a67..f3dd3b38a6 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.english.md
@@ -2,6 +2,7 @@
 id: 587d778c367417b2b2512aa9
 title: Standardize Times with the HTML5 datetime Attribute
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cmzMgtz'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.english.md
index f293236ecb..7614b8fd3a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.english.md
@@ -2,6 +2,7 @@
 id: 587d774d367417b2b2512a9e
 title: Use Headings to Show Hierarchical Relationships of Content
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.english.md
index 169dd1a6df..b8783b7a0b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7790367417b2b2512ab0
 title: Use tabindex to Add Keyboard Focus to an Element
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cmzMDHW'
 forumTopicId: 301027
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.english.md
index f44002bd43..3baef6b7f7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7790367417b2b2512ab1
 title: Use tabindex to Specify the Order of Keyboard Focus for Several Elements
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cmzRRcb'
 forumTopicId: 301028
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.english.md
index c1be4072c8..8d04a0558b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.english.md
@@ -2,6 +2,7 @@
 id: 587d774e367417b2b2512aa0
 title: Wrap Content in the article Element
 challengeType: 0
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 forumTopicId: 301029
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.english.md
index 82e1e9fecc..a158663751 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.english.md
@@ -2,6 +2,7 @@
 id: 587d778b367417b2b2512aa7
 title: Wrap Radio Buttons in a fieldset Element for Better Accessibility
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cVJVefw'
 forumTopicId: 301030
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.english.md
index 6fa234d64a..c0c60bdda8 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.english.md
@@ -2,6 +2,7 @@
 id: 587d781b367417b2b2512abe
 title: Add a box-shadow to a Card-like Element
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.english.md
index 696c55c1d3..b7f68cab8b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.english.md
@@ -2,6 +2,7 @@
 id: 587d781b367417b2b2512abc
 title: Adjust the background-color Property of Text
 challengeType: 0
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 forumTopicId: 301032
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.english.md
index 06cc5cfe6a..84332e7dfd 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.english.md
@@ -2,6 +2,7 @@
 id: 587d78a4367417b2b2512ad3
 title: Adjust the Color of Various Elements to Complementary Colors
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.english.md
index 2439a6f851..9161fb0ca7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.english.md
@@ -2,6 +2,7 @@
 id: 587d7791367417b2b2512ab5
 title: Adjust the Height of an Element Using the height Property
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cEDaDTN'
 forumTopicId: 301034
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.english.md
index 2033045186..d5a4d923ab 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.english.md
@@ -2,6 +2,7 @@
 id: 587d781d367417b2b2512ac8
 title: Adjust the Hover State of an Anchor Tag
 challengeType: 0
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 videoUrl: 'https://scrimba.com/c/cakRGcm'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.english.md
index 7fa0c9c62a..a25d29a254 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.english.md
@@ -2,6 +2,7 @@
 id: 587d78a4367417b2b2512ad4
 title: Adjust the Hue of a Color
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-header-versus-a-paragraph-tag.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-header-versus-a-paragraph-tag.english.md
index 132915c931..21b8cdc324 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-header-versus-a-paragraph-tag.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-header-versus-a-paragraph-tag.english.md
@@ -2,6 +2,7 @@
 id: 587d781b367417b2b2512abd
 title: Adjust the Size of a Header Versus a Paragraph Tag
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.english.md
index a1db4123b6..49fb49f341 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.english.md
index 0fa5e92ff2..1e7a0de951 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.english.md
index 069539b86a..15601eccee 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.english.md
index 9c0781d643..b3b7935e96 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.english.md
index ee33ddb4ff..c4f3997e86 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.english.md
index d21c8e992b..e9d4fa7ce0 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.english.md
index 73d3f7e2d2..fed5d4f416 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.english.md
index 2f1ea2b9f5..644f2a3284 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.english.md
index bc0982051c..b88e46e287 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78a3367417b2b2512acf
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.english.md
index 7f85ce4edb..b7e4b377ae 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.english.md
index 568c5f20c4..3fa16e7a8b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.english.md
index 7105013bcb..49b68a68de 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.english.md
index 826d2abf4c..17166b98d4 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.english.md
index 11a018cd92..ff27f12d7d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.english.md
index 50fea7a19d..db9ef9857b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.english.md
index 78513b2a02..33af72be70 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.english.md
index 581e6c0087..28e34f10f8 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.english.md
@@ -2,6 +2,7 @@
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.english.md
index 018998639b..f4a8f37282 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.english.md
index 6224dfedac..fd881e29fe 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.english.md
index e2a7668a85..83bc353b16 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.english.md
index 15e8da813f..fa6321d31a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.english.md
index 9b4e05b655..918763bce9 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.english.md
index 441f068dcd..c132d69791 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.english.md
@@ -2,6 +2,7 @@
 id: 587d781e367417b2b2512acb
 title: Lock an Element to its Parent with Absolute Positioning
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.english.md
index 012e7d41fd..4625701a51 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.english.md
index 20996bfd5b..c66e64dea3 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.english.md
index 1a01bda788..04f3ad303c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.english.md
index 56460b605f..78fd13d452 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.english.md
index a3b077bdd6..0840edae38 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.english.md
@@ -2,6 +2,7 @@
 id: 587d781e367417b2b2512aca
 title: Move a Relatively Positioned Element with CSS Offsets
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.english.md
index 1b021a5789..173e2a75d1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78a3367417b2b2512ace
 title: Push Elements Left or Right with the float Property
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+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2MDqu2'
 forumTopicId: 301066
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.english.md
index 0ef51479e0..4b7f9aa903 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d781c367417b2b2512ac2
 title: Set the font-size for Multiple Heading Elements
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.english.md
index eb3ee7f675..d72c7df76c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.english.md
@@ -2,6 +2,7 @@
 id: 587d781c367417b2b2512ac4
 title: Set the font-size of Paragraph Text
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+isHidden: false
 videoUrl: 'https://scrimba.com/c/cVJ36Cr'
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.english.md
index e39e46248e..46be10366c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d781c367417b2b2512ac3
 title: Set the font-weight for Multiple Heading Elements
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.english.md
index 79b3c72644..1f26b42410 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.english.md
@@ -2,6 +2,7 @@
 id: 587d781d367417b2b2512ac5
 title: Set the line-height of Paragraphs
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.english.md
index 9f4460f38f..310f04e078 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.english.md
@@ -2,6 +2,7 @@
 id: 587d78a9367417b2b2512ae9
 title: Use a Bezier Curve to Move a Graphic
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.english.md
index 79c7287cf5..48a43583ad 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.english.md
@@ -2,6 +2,7 @@
 id: 587d78a5367417b2b2512ad7
 title: Use a CSS Linear Gradient to Create a Striped Element
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 forumTopicId: 301072
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.english.md
index 64520650c7..1f514be8cc 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.english.md
@@ -2,6 +2,7 @@
 id: 587d78a7367417b2b2512ae0
 title: Use CSS Animation to Change the Hover State of a Button
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+isHidden: false
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 forumTopicId: 301073
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.english.md
index ccf6c94bf9..a025b6a75f 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.english.md
@@ -2,6 +2,7 @@
 id: 587d78a6367417b2b2512adb
 title: Use the CSS Transform Property skewX to Skew an Element Along the X-Axis
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+isHidden: false
 videoUrl: 'https://scrimba.com/c/cyLP8Sr'
 forumTopicId: 301074
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.english.md
index 50010a44cb..fe6d31c17e 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.english.md
@@ -2,6 +2,7 @@
 id: 587d78a6367417b2b2512adc
 title: Use the CSS Transform Property skewY to Skew an Element Along the Y-Axis
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2MZ2uB'
 forumTopicId: 301075
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.english.md
index 4ae53b7501..a26827e1f8 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.english.md
@@ -2,6 +2,7 @@
 id: 587d78a5367417b2b2512ad9
 title: Use the CSS Transform scale Property to Change the Size of an Element
 challengeType: 0
+isHidden: false
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 forumTopicId: 301076
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diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.english.md
index c0ae74756c..0062ae4c04 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.english.md
@@ -2,6 +2,7 @@
 id: 587d78a5367417b2b2512ada
 title: Use the CSS Transform scale Property to Scale an Element on Hover
 challengeType: 0
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 forumTopicId: 301077
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.english.md
index ab48b0778f..3c9fe1d78d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.english.md
@@ -2,6 +2,7 @@
 id: 587d781a367417b2b2512ab9
 title: Use the em Tag to Italicize Text
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+isHidden: false
 videoUrl: 'https://scrimba.com/c/cVJRBtp'
 forumTopicId: 301078
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.english.md
index ec1f19abb7..7ebfec9ff9 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.english.md
@@ -2,6 +2,7 @@
 id: 587d781b367417b2b2512aba
 title: Use the s Tag to Strikethrough Text
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.english.md
index 46f3445cd8..6b7783e2f8 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.english.md
@@ -2,6 +2,7 @@
 id: 587d781a367417b2b2512ab7
 title: Use the strong Tag to Make Text Bold
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 forumTopicId: 301080
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.english.md
index 990dd47ae1..ba60170a44 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.english.md
@@ -2,6 +2,7 @@
 id: 587d781c367417b2b2512ac0
 title: Use the text-transform Property to Make Text Uppercase
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cvVZQSP'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.english.md b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.english.md
index 0f2d1eab95..51f1ab8622 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.english.md
@@ -2,6 +2,7 @@
 id: 587d781a367417b2b2512ab8
 title: Use the u Tag to Underline Text
 challengeType: 0
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.english.md
index 1124225f0d..8aae19b948 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08823
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 challengeType: 0
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-borders-around-your-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-borders-around-your-elements.english.md
index 201c60f6f2..bd70a63918 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-borders-around-your-elements.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-borders-around-your-elements.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9bedf08813
 title: Add Borders Around Your Elements
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.english.md
index 72e0b5922f..4043c92bf2 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1248bd9aedf08824
 title: Add Different Margins to Each Side of an Element
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.english.md
index 0e20c80822..1be9980c4a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08824
 title: Add Different Padding to Each Side of an Element
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.english.md
index 1e7eac4171..bedef218a6 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08814
 title: Add Rounded Corners with border-radius
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.english.md
index ce74cb2caf..edef0aa569 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08822
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.english.md
index f73d596ec5..e8f9eef265 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.english.md
@@ -2,6 +2,7 @@
 id: bad88fee1348bd9aedf08825
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.english.md
index 625c8aad45..6e0890b897 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.english.md
@@ -2,6 +2,7 @@
 id: 5a9d7286424fe3d0e10cad13
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.english.md
index 40bbf548ed..767afa327d 100644
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/change-the-color-of-text.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/change-the-color-of-text.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.english.md
index 60366221fb..ddf482e58d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.english.md
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index 181cd8a790..5d19482984 100644
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index 34bafca720..0feabaa43f 100644
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index 22c11015ed..8eadfebb6c 100644
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.english.md
index 4a653fbc19..1a54d90e7a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.english.md
index 2f65cb7ee7..2ed3f37db2 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.english.md
index 80d93e91e0..f5d3963be7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.english.md
index 67cc7e952a..97d8ec128b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.english.md
index fe09f94e3d..3be7d5aebd 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.english.md
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index 7b998b2b4b..82a84f453e 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-rgb-to-mix-colors.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.english.md
index fa40b5fe1a..f4fb25943d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.english.md
index 6cf6b2371b..fe14364105 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.english.md
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index ac916f992e..68bcf31482 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/add-images-to-your-website.english.md
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index 5080fe96d4..9377c2998f 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.english.md
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index dedd3b8733..37facc2217 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/check-radio-buttons-and-checkboxes-by-default.english.md
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index 40aca0bd9e..1b59ea6687 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/comment-out-html.english.md
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index 1cd46f0a9f..857aae5e03 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-bulleted-unordered-list.english.md
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index b1117b8bf8..19c973c4a1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-form-element.english.md
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index 91754c2852..384a0d653d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-set-of-checkboxes.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.english.md
index e954bd67d0..a30869f240 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.english.md
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@@ -2,6 +2,7 @@
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index e6bd91c74c..024ffddb06 100644
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.english.md
index f1b44205fb..21ca79a344 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.english.md
index 846e872e48..3e051f6aaa 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.english.md
index 52d50d7c4b..2844b69a59 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.english.md
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index d73100ca43..71b10343da 100644
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index a04cd7ac6a..59850713bc 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.english.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.english.md
index df9dd87565..78cb1a94ff 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.english.md
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index 42c882b291..4e7256577b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/inform-with-the-paragraph-element.english.md
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index 18f41062f2..16948923a9 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/introduction-to-html5-elements.english.md
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index e3fce3eaa8..5508855467 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/link-to-external-pages-with-anchor-elements.english.md
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index 4f0bd39120..969857cb74 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/link-to-internal-sections-of-a-page-with-anchor-elements.english.md
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index ad0093b54e..9e2923ee3a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08817
 title: Make Dead Links Using the Hash Symbol
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cMdkytL'
 forumTopicId: 18230
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.english.md
index 7c4e174503..fee2c7fa43 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aede08817
 title: Nest an Anchor Element within a Paragraph
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cb6k8Cb'
 forumTopicId: 18244
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.english.md
index 2537d56a69..fca3e54e3a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aede08835
 title: Nest Many Elements within a Single div Element
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cNW4kC3'
 forumTopicId: 18246
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.english.md
index 54e6da1064..820f5d60e0 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.english.md
@@ -2,6 +2,7 @@
 id: bd7123c8c441eddfaeb5bdef
 title: Say Hello to HTML Elements
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cE8Gpt2'
 forumTopicId: 18276
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.english.md
index 18821efcc0..ab3a14fd97 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08820
 title: Turn an Image into a Link
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cRdBnUr'
 forumTopicId: 18327
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/uncomment-html.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/uncomment-html.english.md
index 4776d48a6a..7b2fd56889 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/uncomment-html.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/uncomment-html.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08802
 title: Uncomment HTML
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cBmG9T7'
 forumTopicId: 18329
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.english.md
index fd8e940466..0b285f1026 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedc08830
 title: Use HTML5 to Require a Field
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVMPUv/cMd4EcQ'
 forumTopicId: 18360
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.english.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.english.md
index 4fb37d00c2..ba90fb02cd 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.english.md
@@ -2,6 +2,7 @@
 id: 5c6c06847491271903d37cfd
 title: Use the value attribute with Radio Buttons and Checkboxes
 challengeType: 0
+isHidden: false
 forumTopicId: 301099
 ---
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.english.md
index bb99a8c204..081c6a672a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.english.md
@@ -2,6 +2,7 @@
 id: 587d78ab367417b2b2512af1
 title: Add Flex Superpowers to the Tweet Embed
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c9W7MhM'
 forumTopicId: 301100
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.english.md
index 3e25e3c367..88278b2bda 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78ad367417b2b2512af8
 title: Align Elements Using the align-items Property
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c8aggtk'
 forumTopicId: 301101
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.english.md
index 6130db5bea..007219ea18 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78ac367417b2b2512af6
 title: Align Elements Using the justify-content Property
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c43gnHm'
 forumTopicId: 301102
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.english.md
index da37ca4123..371f3f75cb 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.english.md
@@ -2,6 +2,7 @@
 id: 587d78ac367417b2b2512af5
 title: Apply the flex-direction Property to Create a Column in the Tweet Embed
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cnzdVC9'
 forumTopicId: 301103
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.english.md
index 3f51f8ee18..eb8b14ef69 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.english.md
@@ -2,6 +2,7 @@
 id: 587d78ab367417b2b2512af3
 title: Apply the flex-direction Property to Create Rows in the Tweet Embed
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cJb8yuq'
 forumTopicId: 301104
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.english.md
index 3645af5543..4a5a70beab 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.english.md
@@ -2,6 +2,7 @@
 id: 587d78ab367417b2b2512af0
 title: 'Use display: flex to Position Two Boxes'
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cgz3QS7'
 forumTopicId: 301105
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.english.md
index 6c54836856..b255e83705 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.english.md
@@ -2,6 +2,7 @@
 id: 587d78ad367417b2b2512af9
 title: Use the align-items Property in the Tweet Embed
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cd3PNfq'
 forumTopicId: 301106
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-self-property.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-self-property.english.md
index 41f92920aa..4b345f3172 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-self-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-align-self-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78af367417b2b2512b00
 title: Use the align-self Property
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cMbvzfv'
 forumTopicId: 301107
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.english.md
index 7b734adb3c..08a50f192e 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.english.md
@@ -2,6 +2,7 @@
 id: 587d78ae367417b2b2512afd
 title: Use the flex-basis Property to Set the Initial Size of an Item
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c3d9nCa'
 forumTopicId: 301108
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.english.md
index df5ff44f38..025346c29d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.english.md
@@ -2,6 +2,7 @@
 id: 587d78ac367417b2b2512af4
 title: Use the flex-direction Property to Make a Column
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cZmWeA4'
 forumTopicId: 301109
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.english.md
index 34236148c1..6dedf7d9f8 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.english.md
@@ -2,6 +2,7 @@
 id: 587d78ab367417b2b2512af2
 title: Use the flex-direction Property to Make a Row
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cBEkbfJ'
 forumTopicId: 301110
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.english.md
index 85b5d37587..aa421197d1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.english.md
@@ -2,6 +2,7 @@
 id: 587d78ae367417b2b2512afc
 title: Use the flex-grow Property to Expand Items
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c2p78cg'
 forumTopicId: 301111
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.english.md
index 011d5b9f95..60819fd7b7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.english.md
@@ -2,6 +2,7 @@
 id: 587d78ae367417b2b2512afe
 title: Use the flex Shorthand Property
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cbpW2tE'
 forumTopicId: 301112
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.english.md
index ac6a371304..9c4d495d66 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.english.md
@@ -2,6 +2,7 @@
 id: 587d78ad367417b2b2512afb
 title: Use the flex-shrink Property to Shrink Items
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cd3PBfr'
 forumTopicId: 301113
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.english.md
index 3fd8763d0e..f7b3f8327c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.english.md
@@ -2,6 +2,7 @@
 id: 587d78ad367417b2b2512afa
 title: Use the flex-wrap Property to Wrap a Row or Column
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cQv9ZtG'
 forumTopicId: 301114
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.english.md
index e9ad5124d2..a563e59bbc 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.english.md
@@ -2,6 +2,7 @@
 id: 587d78ac367417b2b2512af7
 title: Use the justify-content Property in the Tweet Embed
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/c43GgTa'
 forumTopicId: 301115
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.english.md b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.english.md
index 91fd977e07..f65b436fed 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.english.md
@@ -2,6 +2,7 @@
 id: 587d78ae367417b2b2512aff
 title: Use the order Property to Rearrange Items
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pVaDAv/cMbvNAG'
 forumTopicId: 301116
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.english.md
index 2665d0c58f..a864913f08 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.english.md
@@ -2,6 +2,7 @@
 id: 5a9036d038fddaf9a66b5d32
 title: Add Columns with grid-template-columns
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pByETK/c7NzDHv'
 forumTopicId: 301117
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.english.md
index 0328a112db..e2b6e0d101 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.english.md
index 97da48e4a5..87f0e5e5b3 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.english.md
index f15f9c0cca..0f05be53be 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.english.md
index 566a00db94..d55ceb4fe0 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.english.md
index 7dcf2a8eab..f7831ed425 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.english.md
index 9992a31a9d..f2c3cb9d9c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.english.md
index 6d4d62611c..6692fe4b1c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.english.md
index 5435075a70..cbe7d85e66 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.english.md
@@ -2,6 +2,7 @@
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.english.md
index c22f9e24a2..8d398c0494 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.english.md
index cd80a8d21b..9a484b2374 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-grids-within-grids.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-grids-within-grids.english.md
index 2ddd36a22f..3d3f454d45 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-grids-within-grids.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-grids-within-grids.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe8569fb03452672e464
 title: Create Grids within Grids
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-your-first-css-grid.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-your-first-css-grid.english.md
index 0373a9e41a..c1a2ed001b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/create-your-first-css-grid.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/create-your-first-css-grid.english.md
@@ -2,6 +2,7 @@
 id: 5a858944d96184f06fd60d61
 title: Create Your First CSS Grid
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.english.md
index 1a91452b87..eccc6329bb 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe0569fb03452672e45c
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.english.md
index 2bf2fc8e81..83a1ac6744 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe4469fb03452672e460
 title: Limit Item Size Using the minmax Function
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 videoUrl: 'https://scrimba.com/p/pByETK/cD97RTv'
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.english.md
index f1bfdc56f9..51842fc07f 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe1369fb03452672e45d
 title: Place Items in Grid Areas Using the grid-area Property
 challengeType: 0
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.english.md
index ca4edea083..b431e481e2 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe3669fb03452672e45f
 title: Reduce Repetition Using the repeat Function
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 videoUrl: 'https://scrimba.com/p/pByETK/cQvqyHR'
 forumTopicId: 301133
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.english.md
index 0ed8fe8f93..da2f5968af 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.english.md
@@ -2,6 +2,7 @@
 id: 5a9036ee38fddaf9a66b5d34
 title: Use CSS Grid units to Change the Size of Columns and Rows
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pByETK/cvE8phd'
 forumTopicId: 301134
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.english.md
index e03467c94d..a9a428f368 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe2669fb03452672e45e
 title: Use grid-area Without Creating an Areas Template
 challengeType: 0
+isHidden: false
 videoUrl: 'https://scrimba.com/p/pByETK/c6N7VhK'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.english.md
index 203a4852be..adebab3dfe 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.english.md
@@ -2,6 +2,7 @@
 id: 5a90372638fddaf9a66b5d38
 title: Use grid-column to Control Spacing
 challengeType: 0
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 videoUrl: 'https://scrimba.com/p/pByETK/cnzkDSr'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.english.md
index d497eed571..e6c052b264 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.english.md
@@ -2,6 +2,7 @@
 id: 5a90373638fddaf9a66b5d39
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diff --git a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.english.md b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.english.md
index 5fdc5102cb..d3972fc5d5 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.english.md
@@ -2,6 +2,7 @@
 id: 5a94fe7769fb03452672e463
 title: Use Media Queries to Create Responsive Layouts
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diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.english.md
index b3628d9478..c1a810d63d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.english.md
@@ -2,6 +2,7 @@
 id: 587d78b0367417b2b2512b08
 title: Create a Media Query
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diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.english.md
index f01803a41d..183ad89a49 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.english.md
@@ -2,6 +2,7 @@
 id: 587d78b1367417b2b2512b09
 title: Make an Image Responsive
 challengeType: 0
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 videoUrl: 'https://scrimba.com/p/pzrPu4/cz763UD'
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.english.md
index 19ed712ec2..18a45e3df9 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.english.md
@@ -2,6 +2,7 @@
 id: 587d78b1367417b2b2512b0c
 title: Make Typography Responsive
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 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.english.md
index 15af5b6497..3c7b8a1559 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.english.md
@@ -2,6 +2,7 @@
 id: 587d78b1367417b2b2512b0a
 title: Use a Retina Image for Higher Resolution Displays
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 videoUrl: 'https://scrimba.com/p/pzrPu4/cVZ4Rfp'
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diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-personal-portfolio-webpage.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-personal-portfolio-webpage.english.md
index 70d332147d..17fe793946 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-personal-portfolio-webpage.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-personal-portfolio-webpage.english.md
@@ -3,6 +3,7 @@ id: bd7158d8c242eddfaeb5bd13
 title: Build a Personal Portfolio Webpage
 isRequired: true
 challengeType: 3
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 ---
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-product-landing-page.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-product-landing-page.english.md
index 35c9034719..e0b8e22070 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-product-landing-page.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-product-landing-page.english.md
@@ -3,6 +3,7 @@ id: 587d78af367417b2b2512b04
 title: Build a Product Landing Page
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 ---
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-survey-form.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-survey-form.english.md
index c6148646d0..c839376596 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-survey-form.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-survey-form.english.md
@@ -3,6 +3,7 @@ id: 587d78af367417b2b2512b03
 title: Build a Survey Form
 isRequired: true
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 ---
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-technical-documentation-page.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-technical-documentation-page.english.md
index 3b38036ea0..9451748a67 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-technical-documentation-page.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-technical-documentation-page.english.md
@@ -3,6 +3,7 @@ id: 587d78b0367417b2b2512b05
 title: Build a Technical Documentation Page
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301146
 ---
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-tribute-page.english.md b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-tribute-page.english.md
index a454841d96..dc7dd17bd3 100644
--- a/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-tribute-page.english.md
+++ b/curriculum/challenges/english/01-responsive-web-design/responsive-web-design-projects/build-a-tribute-page.english.md
@@ -3,6 +3,7 @@ id: bd7158d8c442eddfaeb5bd18
 title: Build a Tribute Page
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301147
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/boo-who.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/boo-who.english.md
index 1289957276..0f8ebb76dc 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/boo-who.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/boo-who.english.md
@@ -3,6 +3,7 @@ id: a77dbc43c33f39daa4429b4f
 title: Boo who
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16000
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/chunky-monkey.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/chunky-monkey.english.md
index 03e97f0d73..a3373936ee 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/chunky-monkey.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/chunky-monkey.english.md
@@ -3,6 +3,7 @@ id: a9bd25c716030ec90084d8a1
 title: Chunky Monkey
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16005
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/confirm-the-ending.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/confirm-the-ending.english.md
index 51aa68160d..af5c65befc 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/confirm-the-ending.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/confirm-the-ending.english.md
@@ -3,6 +3,7 @@ id: acda2fb1324d9b0fa741e6b5
 title: Confirm the Ending
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16006
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/convert-celsius-to-fahrenheit.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/convert-celsius-to-fahrenheit.english.md
index 9c6303c989..a22e89931f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/convert-celsius-to-fahrenheit.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/convert-celsius-to-fahrenheit.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b3
 title: Convert Celsius to Fahrenheit
 challengeType: 1
+isHidden: false
 isRequired: true
 forumTopicId: 16806
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/factorialize-a-number.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/factorialize-a-number.english.md
index 0587735f37..5a4b1f2b91 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/factorialize-a-number.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/factorialize-a-number.english.md
@@ -3,6 +3,7 @@ id: a302f7aae1aa3152a5b413bc
 title: Factorialize a Number
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16013
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.english.md
index 9c6e052406..e51134c564 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.english.md
@@ -3,6 +3,7 @@ id: adf08ec01beb4f99fc7a68f2
 title: Falsy Bouncer
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16014
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/find-the-longest-word-in-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/find-the-longest-word-in-a-string.english.md
index 79bc1b825a..777092b43d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/find-the-longest-word-in-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/find-the-longest-word-in-a-string.english.md
@@ -3,6 +3,7 @@ id: a26cbbe9ad8655a977e1ceb5
 title: Find the Longest Word in a String
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16015
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers.english.md
index 084b5a8961..4facf79ac0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers.english.md
@@ -3,6 +3,7 @@ id: a6e40f1041b06c996f7b2406
 title: Finders Keepers
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16016
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/mutations.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/mutations.english.md
index be54a9ca0b..40fe047c45 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/mutations.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/mutations.english.md
@@ -3,6 +3,7 @@ id: af2170cad53daa0770fabdea
 title: Mutations
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16025
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.english.md
index 0ce566ca68..c39bde28b7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.english.md
@@ -3,6 +3,7 @@ id: afcc8d540bea9ea2669306b6
 title: Repeat a String Repeat a String
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16041
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays.english.md
index 0ad14e437c..492f26958e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays.english.md
@@ -3,6 +3,7 @@ id: a789b3483989747d63b0e427
 title: Return Largest Numbers in Arrays
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16042
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.english.md
index d5c01fec12..bf5a7cdbbc 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.english.md
@@ -3,6 +3,7 @@ id: a202eed8fc186c8434cb6d61
 title: Reverse a String
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16043
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/slice-and-splice.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/slice-and-splice.english.md
index fc93292af3..c18a1668bf 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/slice-and-splice.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/slice-and-splice.english.md
@@ -2,8 +2,8 @@
 id: 579e2a2c335b9d72dd32e05c
 title: Slice and Splice
 isRequired: true
-isBeta: true
 challengeType: 5
+isHidden: false
 forumTopicId: 301148
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/title-case-a-sentence.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/title-case-a-sentence.english.md
index 0460ff93b2..e21a76673d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/title-case-a-sentence.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/title-case-a-sentence.english.md
@@ -3,6 +3,7 @@ id: ab6137d4e35944e21037b769
 title: Title Case a Sentence
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16088
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.english.md
index 558dd04090..bee2cbb362 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.english.md
@@ -3,6 +3,7 @@ id: ac6993d51946422351508a41
 title: Truncate a String
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16089
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/where-do-i-belong.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/where-do-i-belong.english.md
index e145cd7470..8a3be97949 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/where-do-i-belong.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/where-do-i-belong.english.md
@@ -3,6 +3,7 @@ id: a24c1a4622e3c05097f71d67
 title: Where do I Belong
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16094
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md
index 751252e202..660506cbe9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md
@@ -2,6 +2,7 @@
 id: 5a661e0f1068aca922b3ef17
 title: Access an Array's Contents Using Bracket Notation
 challengeType: 1
+isHidden: false
 forumTopicId: 301149
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md
index 52f07068cf..9e450d6a9f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7c367417b2b2512b1a
 title: Access Property Names with Bracket Notation
 challengeType: 1
+isHidden: false
 forumTopicId: 301150
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-to-an-array-with-push-and-unshift.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-to-an-array-with-push-and-unshift.english.md
index e15e774283..d44bdb5aee 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-to-an-array-with-push-and-unshift.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-to-an-array-with-push-and-unshift.english.md
@@ -2,6 +2,7 @@
 id: 587d78b2367417b2b2512b0e
 title: Add Items to an Array with push() and unshift()
 challengeType: 1
+isHidden: false
 forumTopicId: 301151
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-using-splice.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-using-splice.english.md
index c92aef3df7..4fe802f404 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-using-splice.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-using-splice.english.md
@@ -2,6 +2,7 @@
 id: 587d78b3367417b2b2512b11
 title: Add Items Using splice()
 challengeType: 1
+isHidden: false
 forumTopicId: 301152
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.english.md
index 0530a9e0b7..2363518b1b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7c367417b2b2512b18
 title: Add Key-Value Pairs to JavaScript Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 301153
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.english.md
index 8e59bf00a3..69a84ba109 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7b367417b2b2512b14
 title: Check For The Presence of an Element With indexOf()
 challengeType: 1
+isHidden: false
 forumTopicId: 301154
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.english.md
index af695370b5..44f96dcaa6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7d367417b2b2512b1c
 title: Check if an Object has a Property
 challengeType: 1
+isHidden: false
 forumTopicId: 301155
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md
index 0fee6835d3..cc4615b493 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7b367417b2b2512b17
 title: Combine Arrays with the Spread Operator
 challengeType: 1
+isHidden: false
 forumTopicId: 301156
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-an-array-with-the-spread-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-an-array-with-the-spread-operator.english.md
index c4351d1318..01e9a73a33 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-an-array-with-the-spread-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-an-array-with-the-spread-operator.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7b367417b2b2512b13
 title: Copy an Array with the Spread Operator
 challengeType: 1
+isHidden: false
 forumTopicId: 301157
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-array-items-using-slice.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-array-items-using-slice.english.md
index 5dd84b96cd..995c525722 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-array-items-using-slice.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-array-items-using-slice.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7a367417b2b2512b12
 title: Copy Array Items Using slice()
 challengeType: 1
+isHidden: false
 forumTopicId: 301158
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays.english.md
index 416d40ca4a..0db24d75ae 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7b367417b2b2512b16
 title: Create complex multi-dimensional arrays
 challengeType: 1
+isHidden: false
 forumTopicId: 301159
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.english.md
index c674b5f39c..8c963950c9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7d367417b2b2512b1e
 title: Generate an Array of All Object Keys with Object.keys()
 challengeType: 1
+isHidden: false
 forumTopicId: 301160
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md
index 2f6d6b14d2..de6e8df687 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7b367417b2b2512b15
 title: Iterate Through All an Array's Items Using For Loops
 challengeType: 1
+isHidden: false
 forumTopicId: 301161
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md
index 68d19617dd..3d4bd8518a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7d367417b2b2512b1d
 title: 'Iterate Through the Keys of an Object with a for...in Statement'
 challengeType: 1
+isHidden: false
 forumTopicId: 301162
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md
index 763468154a..91ce7a90d2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7d367417b2b2512b1f
 title: Modify an Array Stored in an Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301163
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md
index 24daa2ad35..d8c167651f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7c367417b2b2512b19
 title: Modify an Object Nested Within an Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301164
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-from-an-array-with-pop-and-shift.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-from-an-array-with-pop-and-shift.english.md
index f1e22139d1..e5c6dbcefb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-from-an-array-with-pop-and-shift.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-from-an-array-with-pop-and-shift.english.md
@@ -2,6 +2,7 @@
 id: 587d78b2367417b2b2512b0f
 title: Remove Items from an Array with pop() and shift()
 challengeType: 1
+isHidden: false
 forumTopicId: 301165
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.english.md
index 5b52d00928..b4af950569 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.english.md
@@ -2,6 +2,7 @@
 id: 587d78b2367417b2b2512b10
 title: Remove Items Using splice()
 challengeType: 1
+isHidden: false
 forumTopicId: 301166
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-an-array-to-store-a-collection-of-data.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-an-array-to-store-a-collection-of-data.english.md
index 98acec6906..e2bc6259d5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-an-array-to-store-a-collection-of-data.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-an-array-to-store-a-collection-of-data.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7e367417b2b2512b20
 title: Use an Array to Store a Collection of Data
 challengeType: 1
+isHidden: false
 forumTopicId: 301167
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md
index 039f2d5b2e..65ec8f8a0c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7c367417b2b2512b1b
 title: Use the delete Keyword to Remove Object Properties
 challengeType: 1
+isHidden: false
 forumTopicId: 301168
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-array-data-with-indexes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-array-data-with-indexes.english.md
index ce54e3c516..b3d1e42acb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-array-data-with-indexes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-array-data-with-indexes.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392ca
 title: Access Array Data with Indexes
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cBZQbTz'
 forumTopicId: 16158
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.english.md
index be1b328d76..de39cb634a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.english.md
@@ -2,6 +2,7 @@
 id: 56592a60ddddeae28f7aa8e1
 title: Access Multi-Dimensional Arrays With Indexes
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ckND4Cq'
 forumTopicId: 16159
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-arrays.english.md
index b04110b4a1..6d9207b062 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-arrays.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244cd
 title: Accessing Nested Arrays
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cLeGDtZ'
 forumTopicId: 16160
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-objects.english.md
index 7c354725f3..d39ba3170f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-nested-objects.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244cc
 title: Accessing Nested Objects
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cRnRnfa'
 forumTopicId: 16161
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-bracket-notation.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-bracket-notation.english.md
index 331e0a4ef7..24fef83d9f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-bracket-notation.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-bracket-notation.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c8
 title: Accessing Object Properties with Bracket Notation
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cBvmEHP'
 forumTopicId: 16163
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-dot-notation.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-dot-notation.english.md
index adbfe55ae8..3d90ffb4ec 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-dot-notation.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-dot-notation.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c7
 title: Accessing Object Properties with Dot Notation
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cGryJs8'
 forumTopicId: 16164
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-variables.english.md
index e2420e6795..b2ce9159a9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-variables.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c9
 title: Accessing Object Properties with Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cnQyKur'
 forumTopicId: 16165
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.english.md
index 7614aabd1d..aad9e7a376 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392d2
 title: Add New Properties to a JavaScript Object
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cQe38UD'
 forumTopicId: 301169
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-two-numbers-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-two-numbers-with-javascript.english.md
index adad0bd793..fd921f316b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-two-numbers-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-two-numbers-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb3bdef
 title: Add Two Numbers with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cM2KBAG'
 forumTopicId: 16650
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/adding-a-default-option-in-switch-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/adding-a-default-option-in-switch-statements.english.md
index 31da473db6..6839c6cd74 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/adding-a-default-option-in-switch-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/adding-a-default-option-in-switch-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244de
 title: Adding a Default Option in Switch Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c3JvVfg'
 forumTopicId: 16653
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/appending-variables-to-strings.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/appending-variables-to-strings.english.md
index 239f4882ad..e165c6a736 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/appending-variables-to-strings.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/appending-variables-to-strings.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ed
 title: Appending Variables to Strings
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cbQmZfa'
 forumTopicId: 16656
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/assignment-with-a-returned-value.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/assignment-with-a-returned-value.english.md
index dacc521208..7404b2b199 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/assignment-with-a-returned-value.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/assignment-with-a-returned-value.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c3
 title: Assignment with a Returned Value
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ce2pEtB'
 forumTopicId: 16658
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/build-javascript-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/build-javascript-objects.english.md
index 6d7f074ab9..cb12ba2b28 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/build-javascript-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/build-javascript-objects.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392d0
 title: Build JavaScript Objects
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cWGkbtd'
 forumTopicId: 16769
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/chaining-if-else-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/chaining-if-else-statements.english.md
index 477b21f612..f1f450fd21 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/chaining-if-else-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/chaining-if-else-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244dc
 title: Chaining If Else Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/caeJgsw'
 forumTopicId: 16772
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comment-your-javascript-code.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comment-your-javascript-code.english.md
index 7bfbbaf5af..256fcc048d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comment-your-javascript-code.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comment-your-javascript-code.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c441eddfaeb4bdef
 title: Comment Your JavaScript Code
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c7ynnTp'
 forumTopicId: 16783
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator.english.md
index 5913f97743..3d6c195b42 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d0
 title: Comparison with the Equality Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cKyVMAL'
 forumTopicId: 16784
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-operator.english.md
index e7521b4c61..27efd1b232 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d4
 title: Comparison with the Greater Than Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cp6GbH4'
 forumTopicId: 16786
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-or-equal-to-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-or-equal-to-operator.english.md
index 5bd9a5faa5..36cd52fff9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-or-equal-to-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-or-equal-to-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d5
 title: Comparison with the Greater Than Or Equal To Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c6KBqtV'
 forumTopicId: 16785
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator.english.md
index eb705e3915..d68503e5ee 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d2
 title: Comparison with the Inequality Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cdBm9Sr'
 forumTopicId: 16787
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-operator.english.md
index 51e528cc3f..53d11dd3c4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d6
 title: Comparison with the Less Than Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cNVRWtB'
 forumTopicId: 16789
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-or-equal-to-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-or-equal-to-operator.english.md
index 1e16a4affa..73672ba585 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-or-equal-to-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-or-equal-to-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d7
 title: Comparison with the Less Than Or Equal To Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cNVR7Am'
 forumTopicId: 16788
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-equality-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-equality-operator.english.md
index ca784fd89b..5b6d2c8647 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-equality-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-equality-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d1
 title: Comparison with the Strict Equality Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cy87atr'
 forumTopicId: 16790
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-inequality-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-inequality-operator.english.md
index ebdbd652c1..b796e12b04 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-inequality-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-inequality-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d3
 title: Comparison with the Strict Inequality Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cKekkUy'
 forumTopicId: 16791
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-and-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-and-operator.english.md
index 7f460dd9b2..a86a798c48 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-and-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-and-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d8
 title: Comparisons with the Logical And Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cvbRVtr'
 forumTopicId: 16799
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-or-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-or-operator.english.md
index fcfab94917..4471204d70 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-or-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-or-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244d9
 title: Comparisons with the Logical Or Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cEPrGTN'
 forumTopicId: 16800
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-addition.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-addition.english.md
index 0172f8cfc4..00995abcdb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-addition.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-addition.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244af
 title: Compound Assignment With Augmented Addition
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cDR6LCb'
 forumTopicId: 16661
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-division.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-division.english.md
index ac399d5b9e..58fcdfb27a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-division.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-division.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b2
 title: Compound Assignment With Augmented Division
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2QvKT2'
 forumTopicId: 16659
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-multiplication.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-multiplication.english.md
index 7bb4bcdd2c..769408e445 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-multiplication.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-multiplication.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b1
 title: Compound Assignment With Augmented Multiplication
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c83vrfa'
 forumTopicId: 16662
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-subtraction.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-subtraction.english.md
index 823a0d3faa..97ae9a9ca4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-subtraction.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-subtraction.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b0
 title: Compound Assignment With Augmented Subtraction
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2Qv7AV'
 forumTopicId: 16660
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.english.md
index cd28541aa6..0ec73a453b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b7
 title: Concatenating Strings with Plus Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cNpM8AN'
 forumTopicId: 16802
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-the-plus-equals-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-the-plus-equals-operator.english.md
index 0f60f61917..9c630fbf41 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-the-plus-equals-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-the-plus-equals-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b8
 title: Concatenating Strings with the Plus Equals Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cbQmmC4'
 forumTopicId: 16803
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.english.md
index 01c2083fb8..4b7101c2d5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b9
 title: Constructing Strings with Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cqk8rf4'
 forumTopicId: 16805
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/count-backwards-with-a-for-loop.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/count-backwards-with-a-for-loop.english.md
index 59c860aa5a..8e1cdd148e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/count-backwards-with-a-for-loop.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/count-backwards-with-a-for-loop.english.md
@@ -2,6 +2,7 @@
 id: 56105e7b514f539506016a5e
 title: Count Backwards With a For Loop
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2R6BHa'
 forumTopicId: 16808
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.english.md
index 1211816ed3..8a19747096 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.english.md
@@ -2,6 +2,7 @@
 id: 565bbe00e9cc8ac0725390f4
 title: Counting Cards
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c6KE7ty'
 forumTopicId: 16809
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/create-decimal-numbers-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/create-decimal-numbers-with-javascript.english.md
index e6f6b8da34..21a583bea1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/create-decimal-numbers-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/create-decimal-numbers-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1391c1c11feddfaeb4bdef
 title: Create Decimal Numbers with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ca8GEuW'
 forumTopicId: 16826
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.english.md
index 287f0756fd..4a65751189 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c443eddfaeb5bdef
 title: Declare JavaScript Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cNanrHq'
 forumTopicId: 17556
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-string-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-string-variables.english.md
index a44abd5c09..71a3301a68 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-string-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-string-variables.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c444eddfaeb5bdef
 title: Declare String Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2QvWU6'
 forumTopicId: 17557
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.english.md
index 5cff4c6e9a..14fb8deb7c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ad
 title: Decrement a Number with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cM2KeS2'
 forumTopicId: 17558
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.english.md
index ee01e7fff9..6380bb9e18 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392d3
 title: Delete Properties from a JavaScript Object
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cDqKdTv'
 forumTopicId: 17560
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-decimal-by-another-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-decimal-by-another-with-javascript.english.md
index 3843d4eb75..cc27b3eb06 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-decimal-by-another-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-decimal-by-another-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: bd7993c9ca9feddfaeb7bdef
 title: Divide One Decimal by Another with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cBZe9AW'
 forumTopicId: 18255
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-number-by-another-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-number-by-another-with-javascript.english.md
index 4689fa67ce..aaf041a00b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-number-by-another-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/divide-one-number-by-another-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb6bdef
 title: Divide One Number by Another with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cqkbdAr'
 forumTopicId: 17566
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escape-sequences-in-strings.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escape-sequences-in-strings.english.md
index 4d7078f481..f399fdacf7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escape-sequences-in-strings.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escape-sequences-in-strings.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b6
 title: Escape Sequences in Strings
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cvmqRh6'
 forumTopicId: 17567
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escaping-literal-quotes-in-strings.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escaping-literal-quotes-in-strings.english.md
index 3ac1b05d79..8557075887 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escaping-literal-quotes-in-strings.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/escaping-literal-quotes-in-strings.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b5
 title: Escaping Literal Quotes in Strings
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2QvgSr'
 forumTopicId: 17568
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/find-the-length-of-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/find-the-length-of-a-string.english.md
index 14d5294b00..b2d4e10928 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/find-the-length-of-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/find-the-length-of-a-string.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c448eddfaeb5bdef
 title: Find the Length of a String
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cvmqEAd'
 forumTopicId: 18182
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/finding-a-remainder-in-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/finding-a-remainder-in-javascript.english.md
index e991acaf6e..29cc7f9bbd 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/finding-a-remainder-in-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/finding-a-remainder-in-javascript.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ae
 title: Finding a Remainder in JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cWP24Ub'
 forumTopicId: 18184
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-fractions-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-fractions-with-javascript.english.md
index 411ac38343..5fbe6471d5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-fractions-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-fractions-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb9bdef
 title: Generate Random Fractions with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cyWJJs3'
 forumTopicId: 18185
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-with-javascript.english.md
index 25441390a1..93161765e9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c12feddfaeb1bdef
 title: Generate Random Whole Numbers with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cRn6bfr'
 forumTopicId: 18186
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range.english.md
index 655c9806b2..67ebaa3a17 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c12feddfaeb2bdef
 title: Generate Random Whole Numbers within a Range
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cm83yu6'
 forumTopicId: 18187
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-scope-and-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-scope-and-functions.english.md
index 71f6a78f6a..eab4d90ab6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-scope-and-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-scope-and-functions.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244be
 title: Global Scope and Functions
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cQM7mCN'
 forumTopicId: 18193
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-vs.-local-scope-in-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-vs.-local-scope-in-functions.english.md
index 5424e40ed7..765c007f89 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-vs.-local-scope-in-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/global-vs.-local-scope-in-functions.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c0
 title: Global vs. Local Scope in Functions
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c2QwKH2'
 forumTopicId: 18194
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/golf-code.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/golf-code.english.md
index 7c62d6c5b5..2dc64bce6b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/golf-code.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/golf-code.english.md
@@ -2,6 +2,7 @@
 id: 5664820f61c48e80c9fa476c
 title: Golf Code
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/c9ykNUR'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/increment-a-number-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/increment-a-number-with-javascript.english.md
index 059b30df02..67b4ce738a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/increment-a-number-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/increment-a-number-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ac
 title: Increment a Number with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ca8GLT9'
 forumTopicId: 18201
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.english.md
index 8cdbd7a8da..aad30818ba 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244a9
 title: Initializing Variables with the Assignment Operator
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cWJ4Bfb'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-if-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-if-statements.english.md
index c231aaebba..8d9b128562 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-if-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-if-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244db
 title: Introducing Else If Statements
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/caeJ2hm'
 forumTopicId: 18206
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-statements.english.md
index 56b3742686..5d5d83f840 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244da
 title: Introducing Else Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cek4Efq'
 forumTopicId: 18207
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-odd-numbers-with-a-for-loop.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-odd-numbers-with-a-for-loop.english.md
index f46a9ae2e7..f7367f2345 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-odd-numbers-with-a-for-loop.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-odd-numbers-with-a-for-loop.english.md
@@ -2,6 +2,7 @@
 id: 56104e9e514f539506016a5c
 title: Iterate Odd Numbers With a For Loop
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cm8n7T9'
 forumTopicId: 18212
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.english.md
index 179f5f6add..bf97781538 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.english.md
@@ -2,6 +2,7 @@
 id: 5675e877dbd60be8ad28edc6
 title: Iterate Through an Array with a For Loop
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/caeR3HB'
 forumTopicId: 18216
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-do...while-loops.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-do...while-loops.english.md
index de3e8d7245..dec80046db 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-do...while-loops.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-do...while-loops.english.md
@@ -2,6 +2,7 @@
 id: 5a2efd662fb457916e1fe604
 title: Iterate with JavaScript Do...While Loops
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cDqWGcp'
 forumTopicId: 301172
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-for-loops.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-for-loops.english.md
index 14681be5b5..14bb092cc3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-for-loops.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-for-loops.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb5bdef
 title: Iterate with JavaScript For Loops
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c9yNVCe'
 forumTopicId: 18219
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-while-loops.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-while-loops.english.md
index ff3250966c..f9648f6e9e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-while-loops.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-with-javascript-while-loops.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb1bdef
 title: Iterate with JavaScript While Loops
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c8QbnCM'
 forumTopicId: 18220
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/local-scope-and-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/local-scope-and-functions.english.md
index 0f223c304e..16395da817 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/local-scope-and-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/local-scope-and-functions.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244bf
 title: Local Scope and Functions
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cd62NhM'
 forumTopicId: 18227
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/logical-order-in-if-else-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/logical-order-in-if-else-statements.english.md
index d8f0835703..526338a313 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/logical-order-in-if-else-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/logical-order-in-if-else-statements.english.md
@@ -2,6 +2,7 @@
 id: 5690307fddb111c6084545d7
 title: Logical Order in If Else Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cwNvMUV'
 forumTopicId: 18228
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-pop.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-pop.english.md
index 5a7a14215d..dff9d8563e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-pop.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-pop.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392cc
 title: Manipulate Arrays With pop()
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cRbVZAB'
 forumTopicId: 18236
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.english.md
index 48934342fa..62056295f9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392cb
 title: Manipulate Arrays With push()
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cnqmVtJ'
 forumTopicId: 18237
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-shift.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-shift.english.md
index 79da8a6a32..98210c578a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-shift.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-shift.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392cd
 title: Manipulate Arrays With shift()
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cRbVETW'
 forumTopicId: 18238
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-unshift.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-unshift.english.md
index 22f2ebff65..48807dec3e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-unshift.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-unshift.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392ce
 title: Manipulate Arrays With unshift()
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/ckNDESv'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulating-complex-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulating-complex-objects.english.md
index b55a3f3530..6f456b9eea 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulating-complex-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulating-complex-objects.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244cb
 title: Manipulating Complex Objects
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/c9yNMfR'
 forumTopicId: 18208
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/modify-array-data-with-indexes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/modify-array-data-with-indexes.english.md
index f29fe291ce..8ff81e62e1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/modify-array-data-with-indexes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/modify-array-data-with-indexes.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb8bdef
 title: Modify Array Data With Indexes
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/czQM4A8'
 forumTopicId: 18241
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiple-identical-options-in-switch-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiple-identical-options-in-switch-statements.english.md
index 64368361d5..f53ee22390 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiple-identical-options-in-switch-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiple-identical-options-in-switch-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244df
 title: Multiple Identical Options in Switch Statements
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cdBKWCV'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-decimals-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-decimals-with-javascript.english.md
index 745681a508..9ca1a51969 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-decimals-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-decimals-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: bd7993c9c69feddfaeb7bdef
 title: Multiply Two Decimals with JavaScript
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/ce2GeHq'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-numbers-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-numbers-with-javascript.english.md
index a0150f16ee..c9a958255c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-numbers-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-numbers-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1231c1c11feddfaeb5bdef
 title: Multiply Two Numbers with JavaScript
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cP3y3Aq'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nest-one-array-within-another-array.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nest-one-array-within-another-array.english.md
index 241ccaf773..8ab871c9dd 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nest-one-array-within-another-array.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nest-one-array-within-another-array.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb7bdef
 title: Nest one Array within Another Array
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/crZQZf8'
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.english.md
index 969eadc632..58f54518b8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244e1
 title: Nesting For Loops
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cRn6GHM'
 forumTopicId: 18248
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/passing-values-to-functions-with-arguments.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/passing-values-to-functions-with-arguments.english.md
index 36097d5845..43ca3b4d0c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/passing-values-to-functions-with-arguments.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/passing-values-to-functions-with-arguments.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244bd
 title: Passing Values to Functions with Arguments
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cy8rahW'
 forumTopicId: 18254
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/practice-comparing-different-values.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/practice-comparing-different-values.english.md
index 3e5be2411f..3e5bd22165 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/practice-comparing-different-values.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/practice-comparing-different-values.english.md
@@ -2,6 +2,7 @@
 id: 599a789b454f2bbd91a3ff4d
 title: Practice comparing different values
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cm8PqCa'
 forumTopicId: 301174
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md
index f567d93b2b..4f00afdfb6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md
@@ -2,6 +2,7 @@
 id: 5688e62ea601b2482ff8422b
 title: Profile Lookup
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cDqW2Cg'
 forumTopicId: 18259
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/quoting-strings-with-single-quotes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/quoting-strings-with-single-quotes.english.md
index b10c06f1f2..a60b2c416a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/quoting-strings-with-single-quotes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/quoting-strings-with-single-quotes.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244b4
 title: Quoting Strings with Single Quotes
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cbQmnhM'
 forumTopicId: 18260
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.english.md
index e0592d5981..623f3469c1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244cf
 title: Record Collection
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c4mpysg'
 forumTopicId: 18261
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replace-loops-using-recursion.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replace-loops-using-recursion.english.md
index 0cf58778f4..5af4e7dd52 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replace-loops-using-recursion.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replace-loops-using-recursion.english.md
@@ -2,6 +2,7 @@
 id: 5cfa3679138e7d9595b9d9d4
 title: Replace Loops using Recursion
 challengeType: 1
+isHidden: false
 videoUrl: 'https://www.freecodecamp.org/news/how-recursion-works-explained-with-flowcharts-and-a-video-de61f40cb7f9/'
 forumTopicId: 301175
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch.english.md
index 593174311d..b4f61688d6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244e0
 title: Replacing If Else Chains with Switch
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c3JE8fy'
 forumTopicId: 18266
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-a-value-from-a-function-with-return.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-a-value-from-a-function-with-return.english.md
index 5bac9966f6..51ea9470c1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-a-value-from-a-function-with-return.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-a-value-from-a-function-with-return.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c2
 title: Return a Value from a Function with Return
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cy87wue'
 forumTopicId: 18271
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.english.md
index 6502296197..396caf41cb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c4
 title: Return Early Pattern for Functions
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cQe39Sq'
 forumTopicId: 18272
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/returning-boolean-values-from-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/returning-boolean-values-from-functions.english.md
index 669f4b016d..8f2ec04031 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/returning-boolean-values-from-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/returning-boolean-values-from-functions.english.md
@@ -2,6 +2,7 @@
 id: 5679ceb97cbaa8c51670a16b
 title: Returning Boolean Values from Functions
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cp62qAQ'
 forumTopicId: 18273
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/selecting-from-many-options-with-switch-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/selecting-from-many-options-with-switch-statements.english.md
index e34faced05..60f9d61d7b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/selecting-from-many-options-with-switch-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/selecting-from-many-options-with-switch-statements.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244dd
 title: Selecting from Many Options with Switch Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c4mv4fm'
 forumTopicId: 18277
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/shopping-list.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/shopping-list.english.md
index e7287ab45b..802e796dca 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/shopping-list.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/shopping-list.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244bc
 title: Shopping List
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c9MEKHZ'
 forumTopicId: 18280
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.english.md
index 3985166c51..efe5571516 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244c6
 title: Stand in Line
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ca8Q8tP'
 forumTopicId: 18307
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/store-multiple-values-in-one-variable-using-javascript-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/store-multiple-values-in-one-variable-using-javascript-arrays.english.md
index b875852fc6..bbfc8c6062 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/store-multiple-values-in-one-variable-using-javascript-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/store-multiple-values-in-one-variable-using-javascript-arrays.english.md
@@ -2,6 +2,7 @@
 id: bd7993c9c69feddfaeb8bdef
 title: Store Multiple Values in one Variable using JavaScript Arrays
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/crZQWAm'
 forumTopicId: 18309
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator.english.md
index 478ecd3b29..732824e328 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244a8
 title: Storing Values with the Assignment Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cEanysE'
 forumTopicId: 18310
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/subtract-one-number-from-another-with-javascript.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/subtract-one-number-from-another-with-javascript.english.md
index 1eef292503..09348d7896 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/subtract-one-number-from-another-with-javascript.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/subtract-one-number-from-another-with-javascript.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c11feddfaeb4bdef
 title: Subtract One Number from Another with JavaScript
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cP3yQtk'
 forumTopicId: 18314
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.english.md
index babb7a83d8..f68c77d5ea 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.english.md
@@ -2,6 +2,7 @@
 id: 567af2437cbaa8c51670a16c
 title: Testing Objects for Properties
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c6Wz4ySr'
 forumTopicId: 18324
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understand-string-immutability.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understand-string-immutability.english.md
index b76588238d..d5bd898c14 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understand-string-immutability.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understand-string-immutability.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ba
 title: Understand String Immutability
 challengeType: 1
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 videoUrl: 'https://scrimba.com/c/cWPVaUR'
 forumTopicId: 18331
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-boolean-values.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-boolean-values.english.md
index 097fd26dd0..76d470942c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-boolean-values.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-boolean-values.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c441eddfaeb5bdef
 title: Understanding Boolean Values
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c9Me8t4'
 forumTopicId: 301176
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.english.md
index 1e95af1ac1..60476133f8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ab
 title: Understanding Case Sensitivity in Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cd6GDcD'
 forumTopicId: 18334
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.english.md
index da06cb5d05..3d113fbd75 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.english.md
@@ -2,6 +2,7 @@
 id: 598e8944f009e646fc236146
 title: Understanding Undefined Value returned from a Function
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ce2p7cL'
 forumTopicId: 301177
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-uninitialized-variables.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-uninitialized-variables.english.md
index 3ed7cf9923..4325cc4c9d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-uninitialized-variables.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-uninitialized-variables.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244aa
 title: Understanding Uninitialized Variables
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cBa2JAL'
 forumTopicId: 18335
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/updating-object-properties.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/updating-object-properties.english.md
index eec44540df..63fd3a71a8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/updating-object-properties.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/updating-object-properties.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392d1
 title: Updating Object Properties
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c9yEJT4'
 forumTopicId: 18336
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-first-character-in-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-first-character-in-a-string.english.md
index 61f2352ef4..6d87389174 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-first-character-in-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-first-character-in-a-string.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c549eddfaeb5bdef
 title: Use Bracket Notation to Find the First Character in a String
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/ca8JwhW'
 forumTopicId: 18341
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-last-character-in-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-last-character-in-a-string.english.md
index 90d4148343..6a814efd60 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-last-character-in-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-last-character-in-a-string.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c451eddfaeb5bdef
 title: Use Bracket Notation to Find the Last Character in a String
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cBZQGcv'
 forumTopicId: 18342
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-character-in-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-character-in-a-string.english.md
index e412e1baf4..22988e5e08 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-character-in-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-character-in-a-string.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c450eddfaeb5bdef
 title: Use Bracket Notation to Find the Nth Character in a String
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cWPVJua'
 forumTopicId: 18343
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-to-last-character-in-a-string.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-to-last-character-in-a-string.english.md
index a886608a1d..5493ba3b51 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-to-last-character-in-a-string.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-to-last-character-in-a-string.english.md
@@ -2,6 +2,7 @@
 id: bd7123c9c452eddfaeb5bdef
 title: Use Bracket Notation to Find the Nth-to-Last Character in a String
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cw4vkh9'
 forumTopicId: 18344
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.english.md
index a246f88fde..ceee1740df 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.english.md
@@ -2,6 +2,7 @@
 id: cf1111c1c12feddfaeb3bdef
 title: Use Conditional Logic with If Statements
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cy87mf3'
 forumTopicId: 18348
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.english.md
index a392d94108..1bb5c6deff 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7e367417b2b2512b21
 title: Use Multiple Conditional (Ternary) Operators
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cyWJBT4'
 forumTopicId: 301179
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-countdown.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-countdown.english.md
index 067beecc4f..fcff714849 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-countdown.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-countdown.english.md
@@ -2,6 +2,7 @@
 id: 5cd9a70215d3c4e65518328f
 title: Use Recursion to Create a Countdown
 challengeType: 1
+isHidden: false
 forumTopicId: 305925
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-range-of-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-range-of-numbers.english.md
index 17f3c56e0e..f0f52d13f9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-range-of-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-range-of-numbers.english.md
@@ -2,6 +2,7 @@
 id: 5cc0bd7a49b71cb96132e54c
 title: Use Recursion to Create a Range of Numbers
 challengeType: 1
+isHidden: false
 forumTopicId: 301180
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-conditional-ternary-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-conditional-ternary-operator.english.md
index 0c63939358..c9464658b1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-conditional-ternary-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-conditional-ternary-operator.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7e367417b2b2512b24
 title: Use the Conditional (Ternary) Operator
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c3JRmSg'
 forumTopicId: 301181
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function-with-a-radix.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function-with-a-radix.english.md
index 19a3bb6dcf..742819ee7f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function-with-a-radix.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function-with-a-radix.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7e367417b2b2512b22
 title: Use the parseInt Function with a Radix
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/c6K4Kh3'
 forumTopicId: 301182
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.english.md
index 46b373a3ac..024462de11 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.english.md
@@ -2,6 +2,7 @@
 id: 587d7b7e367417b2b2512b23
 title: Use the parseInt Function
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cm83LSW'
 forumTopicId: 301183
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups.english.md
index cfdfdcbbf2..59b9ba93ff 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244ca
 title: Using Objects for Lookups
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cdBk8sM'
 forumTopicId: 18373
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.english.md
index 82fcd6de60..8bb8c5df25 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244bb
 title: Word Blanks
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/caqn8zuP'
 forumTopicId: 18377
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/write-reusable-javascript-with-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/write-reusable-javascript-with-functions.english.md
index 1128e6584e..3e61519a03 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/write-reusable-javascript-with-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/write-reusable-javascript-with-functions.english.md
@@ -2,6 +2,7 @@
 id: 56bbb991ad1ed5201cd392cf
 title: Write Reusable JavaScript with Functions
 challengeType: 1
+isHidden: false
 videoUrl: 'https://scrimba.com/c/cL6dqfy'
 forumTopicId: 18378
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-arguments-passed-in-the-wrong-order-when-calling-a-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-arguments-passed-in-the-wrong-order-when-calling-a-function.english.md
index e83571e6e1..6ca663a5c3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-arguments-passed-in-the-wrong-order-when-calling-a-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-arguments-passed-in-the-wrong-order-when-calling-a-function.english.md
@@ -2,6 +2,7 @@
 id: 587d7b85367417b2b2512b3a
 title: Catch Arguments Passed in the Wrong Order When Calling a Function
 challengeType: 1
+isHidden: false
 forumTopicId: 301184
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-missing-open-and-closing-parenthesis-after-a-function-call.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-missing-open-and-closing-parenthesis-after-a-function-call.english.md
index 67d02564da..f7af91415e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-missing-open-and-closing-parenthesis-after-a-function-call.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-missing-open-and-closing-parenthesis-after-a-function-call.english.md
@@ -2,6 +2,7 @@
 id: 587d7b85367417b2b2512b39
 title: Catch Missing Open and Closing Parenthesis After a Function Call
 challengeType: 1
+isHidden: false
 forumTopicId: 301185
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-misspelled-variable-and-function-names.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-misspelled-variable-and-function-names.english.md
index 11518d592e..97f5a8215a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-misspelled-variable-and-function-names.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-misspelled-variable-and-function-names.english.md
@@ -2,6 +2,7 @@
 id: 587d7b84367417b2b2512b35
 title: Catch Misspelled Variable and Function Names
 challengeType: 1
+isHidden: false
 forumTopicId: 301186
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-mixed-usage-of-single-and-double-quotes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-mixed-usage-of-single-and-double-quotes.english.md
index 4732000573..1333fe64aa 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-mixed-usage-of-single-and-double-quotes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-mixed-usage-of-single-and-double-quotes.english.md
@@ -2,6 +2,7 @@
 id: 587d7b84367417b2b2512b37
 title: Catch Mixed Usage of Single and Double Quotes
 challengeType: 1
+isHidden: false
 forumTopicId: 301188
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-off-by-one-errors-when-using-indexing.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-off-by-one-errors-when-using-indexing.english.md
index 2a3ef9d968..066be5ef91 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-off-by-one-errors-when-using-indexing.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-off-by-one-errors-when-using-indexing.english.md
@@ -2,6 +2,7 @@
 id: 587d7b86367417b2b2512b3b
 title: Catch Off By One Errors When Using Indexing
 challengeType: 1
+isHidden: false
 forumTopicId: 301189
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-unclosed-parentheses-brackets-braces-and-quotes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-unclosed-parentheses-brackets-braces-and-quotes.english.md
index 49ea32f7ab..f782c72470 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-unclosed-parentheses-brackets-braces-and-quotes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-unclosed-parentheses-brackets-braces-and-quotes.english.md
@@ -2,6 +2,7 @@
 id: 587d7b84367417b2b2512b36
 title: 'Catch Unclosed Parentheses, Brackets, Braces and Quotes'
 challengeType: 1
+isHidden: false
 forumTopicId: 301190
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-use-of-assignment-operator-instead-of-equality-operator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-use-of-assignment-operator-instead-of-equality-operator.english.md
index 8d0435e6b0..3131c688ed 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-use-of-assignment-operator-instead-of-equality-operator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/catch-use-of-assignment-operator-instead-of-equality-operator.english.md
@@ -2,6 +2,7 @@
 id: 587d7b85367417b2b2512b38
 title: Catch Use of Assignment Operator Instead of Equality Operator
 challengeType: 1
+isHidden: false
 forumTopicId: 301191
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/prevent-infinite-loops-with-a-valid-terminal-condition.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/prevent-infinite-loops-with-a-valid-terminal-condition.english.md
index 3a95b7fc52..8c3bb5d950 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/prevent-infinite-loops-with-a-valid-terminal-condition.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/prevent-infinite-loops-with-a-valid-terminal-condition.english.md
@@ -2,6 +2,7 @@
 id: 587d7b86367417b2b2512b3d
 title: Prevent Infinite Loops with a Valid Terminal Condition
 challengeType: 1
+isHidden: false
 forumTopicId: 301192
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/understanding-the-differences-between-the-freecodecamp-and-browser-console.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/understanding-the-differences-between-the-freecodecamp-and-browser-console.english.md
index e300aa870a..a9b789b148 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/understanding-the-differences-between-the-freecodecamp-and-browser-console.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/understanding-the-differences-between-the-freecodecamp-and-browser-console.english.md
@@ -2,6 +2,7 @@
 id: 587d7b83367417b2b2512b37
 title: Understanding the Differences between the freeCodeCamp and Browser Console
 challengeType: 1
+isHidden: false
 forumTopicId: 301193
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-caution-when-reinitializing-variables-inside-a-loop.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-caution-when-reinitializing-variables-inside-a-loop.english.md
index c3667519a9..2a36efac45 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-caution-when-reinitializing-variables-inside-a-loop.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-caution-when-reinitializing-variables-inside-a-loop.english.md
@@ -2,6 +2,7 @@
 id: 587d7b86367417b2b2512b3c
 title: Use Caution When Reinitializing Variables Inside a Loop
 challengeType: 1
+isHidden: false
 forumTopicId: 301194
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-the-javascript-console-to-check-the-value-of-a-variable.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-the-javascript-console-to-check-the-value-of-a-variable.english.md
index 4a72d21d74..fdb39e04b6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-the-javascript-console-to-check-the-value-of-a-variable.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-the-javascript-console-to-check-the-value-of-a-variable.english.md
@@ -2,6 +2,7 @@
 id: 587d7b83367417b2b2512b33
 title: Use the JavaScript Console to Check the Value of a Variable
 challengeType: 1
+isHidden: false
 forumTopicId: 18372
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.english.md
index 25497f96f7..0a047571ce 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.english.md
@@ -2,6 +2,7 @@
 id: 587d7b84367417b2b2512b34
 title: Use typeof to Check the Type of a Variable
 challengeType: 1
+isHidden: false
 forumTopicId: 18374
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.english.md
index 1beaf7d615..fbe7e3163e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.english.md
@@ -2,6 +2,7 @@
 id: 587d7b87367417b2b2512b40
 title: Compare Scopes of the var and let Keywords
 challengeType: 1
+isHidden: false
 forumTopicId: 301195
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.english.md
index 718d69f00f..fdd2aa5251 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.english.md
@@ -2,6 +2,7 @@
 id: 5cdafbc32913098997531680
 title: Complete a Promise with resolve and reject
 challengeType: 1
+isHidden: false
 forumTopicId: 301196
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-javascript-promise.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-javascript-promise.english.md
index 2064404147..ab317f8164 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-javascript-promise.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-javascript-promise.english.md
@@ -2,6 +2,7 @@
 id: 5cdafbb0291309899753167f
 title: Create a JavaScript Promise
 challengeType: 1
+isHidden: false
 forumTopicId: 301197
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-module-script.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-module-script.english.md
index 6f16307c67..cc4edf7850 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-module-script.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-module-script.english.md
@@ -2,6 +2,7 @@
 id: 5cddbfd622f1a59093ec611d
 title: Create a Module Script
 challengeType: 6
+isHidden: false
 forumTopicId: 301198
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-an-export-fallback-with-export-default.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-an-export-fallback-with-export-default.english.md
index 31c180ee5b..2dd0995682 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-an-export-fallback-with-export-default.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-an-export-fallback-with-export-default.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8c367417b2b2512b58
 title: Create an Export Fallback with export default
 challengeType: 1
+isHidden: false
 forumTopicId: 301199
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals.english.md
index 0fa47d51b7..c8b86801e3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8a367417b2b2512b4e
 title: Create Strings using Template Literals
 challengeType: 1
+isHidden: false
 forumTopicId: 301200
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/declare-a-read-only-variable-with-the-const-keyword.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/declare-a-read-only-variable-with-the-const-keyword.english.md
index 480727ea24..2064eaa089 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/declare-a-read-only-variable-with-the-const-keyword.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/declare-a-read-only-variable-with-the-const-keyword.english.md
@@ -2,6 +2,7 @@
 id: 587d7b87367417b2b2512b41
 title: Declare a Read-Only Variable with the const Keyword
 challengeType: 1
+isHidden: false
 forumTopicId: 301201
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/explore-differences-between-the-var-and-let-keywords.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/explore-differences-between-the-var-and-let-keywords.english.md
index 9869fb777d..1711684180 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/explore-differences-between-the-var-and-let-keywords.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/explore-differences-between-the-var-and-let-keywords.english.md
@@ -2,6 +2,7 @@
 id: 587d7b87367417b2b2512b3f
 title: Explore Differences Between the var and let Keywords
 challengeType: 1
+isHidden: false
 forumTopicId: 301202
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.english.md
index eaa1e75631..10edad7de0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.english.md
@@ -2,6 +2,7 @@
 id: 5cdafbd72913098997531681
 title: Handle a Fulfilled Promise with then
 challengeType: 1
+isHidden: false
 forumTopicId: 301203
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.english.md
index 36dbb68202..41de01de0b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.english.md
@@ -2,6 +2,7 @@
 id: 5cdafbe72913098997531682
 title: Handle a Rejected Promise with catch
 challengeType: 1
+isHidden: false
 forumTopicId: 301204
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.english.md
index cf04c52cf8..1845218788 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8d367417b2b2512b59
 title: Import a Default Export
 challengeType: 1
+isHidden: false
 forumTopicId: 301205
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/mutate-an-array-declared-with-const.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/mutate-an-array-declared-with-const.english.md
index 89d30408a8..4b9c92fe0a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/mutate-an-array-declared-with-const.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/mutate-an-array-declared-with-const.english.md
@@ -2,6 +2,7 @@
 id: 587d7b87367417b2b2512b42
 title: Mutate an Array Declared with const
 challengeType: 1
+isHidden: false
 forumTopicId: 301206
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/prevent-object-mutation.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/prevent-object-mutation.english.md
index 36e338107a..1ea2e89491 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/prevent-object-mutation.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/prevent-object-mutation.english.md
@@ -2,6 +2,7 @@
 id: 598f48a36c8c40764b4e52b3
 title: Prevent Object Mutation
 challengeType: 1
+isHidden: false
 forumTopicId: 301207
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.english.md
index f4a0d68c0a..dc39b5fa0a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8c367417b2b2512b55
 title: Reuse JavaScript Code Using import
 challengeType: 1
+isHidden: false
 forumTopicId: 301208
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/set-default-parameters-for-your-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/set-default-parameters-for-your-functions.english.md
index 555f79b8c1..650a2c3fab 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/set-default-parameters-for-your-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/set-default-parameters-for-your-functions.english.md
@@ -2,6 +2,7 @@
 id: 587d7b88367417b2b2512b46
 title: Set Default Parameters for Your Functions
 challengeType: 1
+isHidden: false
 forumTopicId: 301209
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use--to-import-everything-from-a-file.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use--to-import-everything-from-a-file.english.md
index a1f22d84dd..57302a3ce3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use--to-import-everything-from-a-file.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use--to-import-everything-from-a-file.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8c367417b2b2512b57
 title: Use * to Import Everything from a File
 challengeType: 1
+isHidden: false
 forumTopicId: 301210
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-arrow-functions-to-write-concise-anonymous-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-arrow-functions-to-write-concise-anonymous-functions.english.md
index f865d890fb..28e7bb03b1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-arrow-functions-to-write-concise-anonymous-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-arrow-functions-to-write-concise-anonymous-functions.english.md
@@ -2,6 +2,7 @@
 id: 587d7b87367417b2b2512b43
 title: Use Arrow Functions to Write Concise Anonymous Functions
 challengeType: 1
+isHidden: false
 forumTopicId: 301211
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.english.md
index ed67216604..05496e3013 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8b367417b2b2512b53
 title: Use class Syntax to Define a Constructor Function
 challengeType: 1
+isHidden: false
 forumTopicId: 301212
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md
index 98f31c4779..18c41f306d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md
@@ -2,6 +2,7 @@
 id: 587d7b89367417b2b2512b4b
 title: Use Destructuring Assignment to Assign Variables from Arrays
 challengeType: 1
+isHidden: false
 forumTopicId: 301213
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.english.md
index 8fceb1ce80..04ce51c2af 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.english.md
@@ -2,6 +2,7 @@
 id: 587d7b89367417b2b2512b4a
 title: Use Destructuring Assignment to Assign Variables from Nested Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 301214
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.english.md
index 2f209530dd..5a23118808 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.english.md
@@ -2,6 +2,7 @@
 id: 587d7b89367417b2b2512b49
 title: Use Destructuring Assignment to Assign Variables from Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 301215
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-extract-values-from-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-extract-values-from-objects.english.md
index 3307bdce0e..94e4d2490d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-extract-values-from-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-extract-values-from-objects.english.md
@@ -2,6 +2,7 @@
 id: 5cfa550e84205a357704ccb6
 title: Use Destructuring Assignment to Extract Values from Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 301216
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.english.md
index 290ed50c49..9dcbb473f6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8a367417b2b2512b4d
 title: Use Destructuring Assignment to Pass an Object as a Function's Parameters
 challengeType: 1
+isHidden: false
 forumTopicId: 301217
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-with-the-rest-parameter-to-reassign-array-elements.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-with-the-rest-parameter-to-reassign-array-elements.english.md
index 68e6b3335a..d6d73afb17 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-with-the-rest-parameter-to-reassign-array-elements.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-with-the-rest-parameter-to-reassign-array-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8a367417b2b2512b4c
 title: Use Destructuring Assignment with the Rest Parameter to Reassign Array Elements
 challengeType: 1
+isHidden: false
 forumTopicId: 301218
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-export-to-share-a-code-block.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-export-to-share-a-code-block.english.md
index 17df6e4ad0..ae112a5e68 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-export-to-share-a-code-block.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-export-to-share-a-code-block.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8c367417b2b2512b56
 title: Use export to Share a Code Block
 challengeType: 1
+isHidden: false
 forumTopicId: 301219
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.english.md
index eed16750eb..de16507aa6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8c367417b2b2512b54
 title: Use getters and setters to Control Access to an Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301220
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-rest-parameter-with-function-parameters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-rest-parameter-with-function-parameters.english.md
index 5d003a699a..f5ca5deaff 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-rest-parameter-with-function-parameters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-rest-parameter-with-function-parameters.english.md
@@ -2,6 +2,7 @@
 id: 587d7b88367417b2b2512b47
 title: Use the Rest Parameter with Function Parameters
 challengeType: 1
+isHidden: false
 forumTopicId: 301221
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.english.md
index 82f3266191..7cda93df36 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.english.md
@@ -2,6 +2,7 @@
 id: 587d7b89367417b2b2512b48
 title: Use the Spread Operator to Evaluate Arrays In-Place
 challengeType: 1
+isHidden: false
 forumTopicId: 301222
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-arrow-functions-with-parameters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-arrow-functions-with-parameters.english.md
index 7920045776..fa4132f5a7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-arrow-functions-with-parameters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-arrow-functions-with-parameters.english.md
@@ -2,6 +2,7 @@
 id: 587d7b88367417b2b2512b44
 title: Write Arrow Functions with Parameters
 challengeType: 1
+isHidden: false
 forumTopicId: 301223
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.english.md
index ea73909047..9fe2b60de2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8b367417b2b2512b50
 title: Write Concise Declarative Functions with ES6
 challengeType: 1
+isHidden: false
 forumTopicId: 301224
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand.english.md
index 9234dbbcaf..04d67f3e31 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8a367417b2b2512b4f
 title: Write Concise Object Literal Declarations Using Object Property Shorthand
 challengeType: 1
+isHidden: false
 forumTopicId: 301225
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/add-elements-to-the-end-of-an-array-using-concat-instead-of-push.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/add-elements-to-the-end-of-an-array-using-concat-instead-of-push.english.md
index d018f1db5c..1abdaf8ca2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/add-elements-to-the-end-of-an-array-using-concat-instead-of-push.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/add-elements-to-the-end-of-an-array-using-concat-instead-of-push.english.md
@@ -2,6 +2,7 @@
 id: 587d7da9367417b2b2512b67
 title: Add Elements to the End of an Array Using concat Instead of push
 challengeType: 1
+isHidden: false
 forumTopicId: 301226
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/apply-functional-programming-to-convert-strings-to-url-slugs.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/apply-functional-programming-to-convert-strings-to-url-slugs.english.md
index eb87a3490f..baacc3ef3e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/apply-functional-programming-to-convert-strings-to-url-slugs.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/apply-functional-programming-to-convert-strings-to-url-slugs.english.md
@@ -2,6 +2,7 @@
 id: 587d7dab367417b2b2512b6d
 title: Apply Functional Programming to Convert Strings to URL Slugs
 challengeType: 1
+isHidden: false
 forumTopicId: 301227
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
index 2203ac3638..eb551f3652 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8e367417b2b2512b5e
 title: Avoid Mutations and Side Effects Using Functional Programming
 challengeType: 1
+isHidden: false
 forumTopicId: 301228
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-an-array-into-a-string-using-the-join-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-an-array-into-a-string-using-the-join-method.english.md
index ee7afe2378..0cdeb81b08 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-an-array-into-a-string-using-the-join-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-an-array-into-a-string-using-the-join-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7daa367417b2b2512b6c
 title: Combine an Array into a String Using the join Method
 challengeType: 1
+isHidden: false
 forumTopicId: 18221
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-two-arrays-using-the-concat-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-two-arrays-using-the-concat-method.english.md
index 3b4097d315..90e54f790c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-two-arrays-using-the-concat-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/combine-two-arrays-using-the-concat-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7da9367417b2b2512b66
 title: Combine Two Arrays Using the concat Method
 challengeType: 1
+isHidden: false
 forumTopicId: 301229
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-map-on-a-prototype.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-map-on-a-prototype.english.md
index a3bbaf1855..00000f0e11 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-map-on-a-prototype.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-map-on-a-prototype.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8f367417b2b2512b62
 title: Implement map on a Prototype
 challengeType: 1
+isHidden: false
 forumTopicId: 301230
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-the-filter-method-on-a-prototype.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-the-filter-method-on-a-prototype.english.md
index d26c2961f1..455e9c0cbf 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-the-filter-method-on-a-prototype.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/implement-the-filter-method-on-a-prototype.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8f367417b2b2512b64
 title: Implement the filter Method on a Prototype
 challengeType: 1
+isHidden: false
 forumTopicId: 301231
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
index 982c0efeb9..dddea6e93b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
@@ -2,6 +2,7 @@
 id: 587d7dab367417b2b2512b70
 title: Introduction to Currying and Partial Application
 challengeType: 1
+isHidden: false
 forumTopicId: 301232
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md
index e6d21eaf71..e3e9aa77e5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8d367417b2b2512b5b
 title: Learn About Functional Programming
 challengeType: 1
+isHidden: false
 forumTopicId: 301233
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/pass-arguments-to-avoid-external-dependence-in-a-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/pass-arguments-to-avoid-external-dependence-in-a-function.english.md
index 400b7ffdda..ea82de1e8b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/pass-arguments-to-avoid-external-dependence-in-a-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/pass-arguments-to-avoid-external-dependence-in-a-function.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8e367417b2b2512b5f
 title: Pass Arguments to Avoid External Dependence in a Function
 challengeType: 1
+isHidden: false
 forumTopicId: 301234
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.english.md
index db04a3bb9b..33bcf56388 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8f367417b2b2512b60
 title: Refactor Global Variables Out of Functions
 challengeType: 1
+isHidden: false
 forumTopicId: 301235
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/remove-elements-from-an-array-using-slice-instead-of-splice.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/remove-elements-from-an-array-using-slice-instead-of-splice.english.md
index d3b5e3ffd1..7a0dce2ce4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/remove-elements-from-an-array-using-slice-instead-of-splice.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/remove-elements-from-an-array-using-slice-instead-of-splice.english.md
@@ -2,6 +2,7 @@
 id: 9d7123c8c441eeafaeb5bdef
 title: Remove Elements from an Array Using slice Instead of splice
 challengeType: 1
+isHidden: false
 forumTopicId: 301236
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.english.md
index cab7bcca44..1f12684b05 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.english.md
@@ -2,6 +2,7 @@
 id: 587d7da9367417b2b2512b6a
 title: Return a Sorted Array Without Changing the Original Array
 challengeType: 1
+isHidden: false
 forumTopicId: 301237
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-part-of-an-array-using-the-slice-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-part-of-an-array-using-the-slice-method.english.md
index 15dfdca834..1ebadeba42 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-part-of-an-array-using-the-slice-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-part-of-an-array-using-the-slice-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7b90367417b2b2512b65
 title: Return Part of an Array Using the slice Method
 challengeType: 1
+isHidden: false
 forumTopicId: 301239
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/sort-an-array-alphabetically-using-the-sort-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/sort-an-array-alphabetically-using-the-sort-method.english.md
index afc7cf3743..42010cfc04 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/sort-an-array-alphabetically-using-the-sort-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/sort-an-array-alphabetically-using-the-sort-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7da9367417b2b2512b69
 title: Sort an Array Alphabetically using the sort Method
 challengeType: 1
+isHidden: false
 forumTopicId: 18303
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/split-a-string-into-an-array-using-the-split-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/split-a-string-into-an-array-using-the-split-method.english.md
index 3d7f20da6a..2d0ad73c48 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/split-a-string-into-an-array-using-the-split-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/split-a-string-into-an-array-using-the-split-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7daa367417b2b2512b6b
 title: Split a String into an Array Using the split Method
 challengeType: 1
+isHidden: false
 forumTopicId: 18305
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md
index 40d1721a40..100ad6f584 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8e367417b2b2512b5c
 title: Understand Functional Programming Terminology
 challengeType: 1
+isHidden: false
 forumTopicId: 301240
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-the-hazards-of-using-imperative-code.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-the-hazards-of-using-imperative-code.english.md
index 1b484dc4e2..89eab9a785 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-the-hazards-of-using-imperative-code.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-the-hazards-of-using-imperative-code.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8e367417b2b2512b5d
 title: Understand the Hazards of Using Imperative Code
 challengeType: 1
+isHidden: false
 forumTopicId: 301241
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem.english.md
index 991bf02b19..402ce6e6d7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem.english.md
@@ -2,6 +2,7 @@
 id: 587d7b88367417b2b2512b45
 title: Use Higher-Order Functions map, filter, or reduce to Solve a Complex Problem 
 challengeType: 1
+isHidden: false
 forumTopicId: 301311
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
index 4317257488..e905609fb7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.english.md
@@ -2,6 +2,7 @@
 id: 587d7dab367417b2b2512b6e
 title: Use the every Method to Check that Every Element in an Array Meets a Criteria
 challengeType: 1
+isHidden: false
 forumTopicId: 301312
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-filter-method-to-extract-data-from-an-array.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-filter-method-to-extract-data-from-an-array.english.md
index ae5b3a6afd..016017d23c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-filter-method-to-extract-data-from-an-array.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-filter-method-to-extract-data-from-an-array.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8f367417b2b2512b63
 title: Use the filter Method to Extract Data from an Array
 challengeType: 1
+isHidden: false
 forumTopicId: 18179
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
index 95748fc074..c3e3dba7ff 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
@@ -2,6 +2,7 @@
 id: 587d7b8f367417b2b2512b61
 title: Use the map Method to Extract Data from an Array
 challengeType: 1
+isHidden: false
 forumTopicId: 18214
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data.english.md
index 0cf9f756c9..eeacee9237 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data.english.md
@@ -2,6 +2,7 @@
 id: 587d7da9367417b2b2512b68
 title: Use the reduce Method to Analyze Data
 challengeType: 1
+isHidden: false
 forumTopicId: 301313
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.english.md
index 65bbdba77d..b9bf2d2b29 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.english.md
@@ -2,6 +2,7 @@
 id: 587d7dab367417b2b2512b6f
 title: Use the some Method to Check that Any Elements in an Array Meet a Criteria
 challengeType: 1
+isHidden: false
 forumTopicId: 301314
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/arguments-optional.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/arguments-optional.english.md
index 3f77fcb655..1b6465d4ae 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/arguments-optional.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/arguments-optional.english.md
@@ -3,6 +3,7 @@ id: a97fd23d9b809dac9921074f
 title: Arguments Optional
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 14271
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents.english.md
index 8e908e7d5e..41449e095e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents.english.md
@@ -3,6 +3,7 @@ id: a8d97bd4c764e91f9d2bda01
 title: Binary Agents
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 14273
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md
index 301e43dc20..1eed482629 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md
@@ -3,6 +3,7 @@ id: a6b0bb188d873cb2c8729495
 title: Convert HTML Entities
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16007
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays.english.md
index 168f59cbdb..f65c0da5ee 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays.english.md
@@ -3,6 +3,7 @@ id: a5de63ebea8dbee56860f4f2
 title: Diff Two Arrays
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16008
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/dna-pairing.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/dna-pairing.english.md
index 580c713aa0..f9a33d4521 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/dna-pairing.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/dna-pairing.english.md
@@ -3,6 +3,7 @@ id: afd15382cdfb22c9efe8b7de
 title: DNA Pairing
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16009
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/drop-it.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/drop-it.english.md
index 944083bbcf..675bbd9225 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/drop-it.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/drop-it.english.md
@@ -3,6 +3,7 @@ id: a5deed1811a43193f9f1c841
 title: Drop it
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16010
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.english.md
index 77d2515588..432eee31e5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.english.md
@@ -3,6 +3,7 @@ id: a10d2431ad0c6a099a4b8b52
 title: Everything Be True
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16011
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/make-a-person.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/make-a-person.english.md
index 18eeebbbaa..717e35612d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/make-a-person.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/make-a-person.english.md
@@ -2,6 +2,7 @@
 id: a2f1d72d9b908d0bd72bb9f6
 title: Make a Person
 challengeType: 5
+isHidden: false
 forumTopicId: 16020
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.english.md
index 17c4aa3241..7fa85055c6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.english.md
@@ -2,6 +2,7 @@
 id: af4afb223120f7348cdfc9fd
 title: Map the Debris
 challengeType: 5
+isHidden: false
 forumTopicId: 16021
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/missing-letters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/missing-letters.english.md
index 001fa00025..2fe64e00fb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/missing-letters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/missing-letters.english.md
@@ -3,6 +3,7 @@ id: af7588ade1100bde429baf20
 title: Missing letters
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16023
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/pig-latin.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/pig-latin.english.md
index dc6c6ae993..f6fa82fb12 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/pig-latin.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/pig-latin.english.md
@@ -3,6 +3,7 @@ id: aa7697ea2477d1316795783b
 title: Pig Latin
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16039
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/search-and-replace.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/search-and-replace.english.md
index 210707cb16..97b329da05 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/search-and-replace.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/search-and-replace.english.md
@@ -3,6 +3,7 @@ id: a0b5010f579e69b815e7c5d6
 title: Search and Replace
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16045
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.english.md
index ec94af9ed8..54b69278d9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.english.md
@@ -3,6 +3,7 @@ id: a39963a4c10bc8b4d4f06d7e
 title: Seek and Destroy
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16046
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/smallest-common-multiple.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/smallest-common-multiple.english.md
index 98326354d3..84fd8554f6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/smallest-common-multiple.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/smallest-common-multiple.english.md
@@ -3,6 +3,7 @@ id: ae9defd7acaf69703ab432ea
 title: Smallest Common Multiple
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16075
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sorted-union.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sorted-union.english.md
index 7bd7488743..95ec542333 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sorted-union.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sorted-union.english.md
@@ -3,6 +3,7 @@ id: a105e963526e7de52b219be9
 title: Sorted Union
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16077
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md
index 4a14828dba..723354f2b2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md
@@ -3,6 +3,7 @@ id: a103376db3ba46b2d50db289
 title: Spinal Tap Case
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16078
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
index 6067408bbc..66ed4eb97b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
@@ -3,6 +3,7 @@ id: ab306dbdcc907c7ddfc30830
 title: Steamroller
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16079
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-numbers-in-a-range.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-numbers-in-a-range.english.md
index 222e01817f..77976f44b7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-numbers-in-a-range.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-numbers-in-a-range.english.md
@@ -3,6 +3,7 @@ id: a3566b1109230028080c9345
 title: Sum All Numbers in a Range
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16083
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-odd-fibonacci-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-odd-fibonacci-numbers.english.md
index 7a894822aa..173f9b36db 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-odd-fibonacci-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-odd-fibonacci-numbers.english.md
@@ -3,6 +3,7 @@ id: a5229172f011153519423690
 title: Sum All Odd Fibonacci Numbers
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16084
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-primes.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-primes.english.md
index 701e1b3bd4..a475bda441 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-primes.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/sum-all-primes.english.md
@@ -3,6 +3,7 @@ id: a3bfc1673c0526e06d3ac698
 title: Sum All Primes
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16085
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou.english.md
index 02d920efd7..8ecf338624 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou.english.md
@@ -3,6 +3,7 @@ id: a8e512fbe388ac2f9198f0fa
 title: Wherefore art thou
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16092
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/caesars-cipher.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/caesars-cipher.english.md
index dcf4ac0e07..f5623a0cfa 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/caesars-cipher.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/caesars-cipher.english.md
@@ -2,6 +2,7 @@
 id: 56533eb9ac21ba0edf2244e2
 title: Caesars Cipher
 challengeType: 5
+isHidden: false
 isRequired: true
 forumTopicId: 16003
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.english.md
index 2abfc965e7..5a4db6d211 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.english.md
@@ -3,6 +3,7 @@ id: aa2e6f85cab2ab736c9a9b24
 title: Cash Register
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16012
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/palindrome-checker.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/palindrome-checker.english.md
index e89e202049..e5f2d801f3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/palindrome-checker.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/palindrome-checker.english.md
@@ -3,6 +3,7 @@ id: aaa48de84e1ecc7c742e1124
 title: Palindrome Checker
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16004
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.english.md
index 178f33b256..baf3f7ad73 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.english.md
@@ -3,6 +3,7 @@ id: a7f4d8f2483413a6ce226cac
 title: Roman Numeral Converter
 isRequired: true
 challengeType: 5
+isHidden: false
 forumTopicId: 16044
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/telephone-number-validator.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/telephone-number-validator.english.md
index 12cb814e5b..9e4e46ae2c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/telephone-number-validator.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/telephone-number-validator.english.md
@@ -2,6 +2,7 @@
 id: aff0395860f5d3034dc0bfc9
 title: Telephone Number Validator
 challengeType: 5
+isHidden: false
 isRequired: true
 forumTopicId: 16090
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/add-methods-after-inheritance.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/add-methods-after-inheritance.english.md
index 1d41bc5e6f..d089294991 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/add-methods-after-inheritance.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/add-methods-after-inheritance.english.md
@@ -2,6 +2,7 @@
 id: 587d7db1367417b2b2512b87
 title: Add Methods After Inheritance
 challengeType: 1
+isHidden: false
 forumTopicId: 301315
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/change-the-prototype-to-a-new-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/change-the-prototype-to-a-new-object.english.md
index a296611a89..17c233911f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/change-the-prototype-to-a-new-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/change-the-prototype-to-a-new-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7daf367417b2b2512b7f
 title: Change the Prototype to a New Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301316
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-basic-javascript-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-basic-javascript-object.english.md
index 06d80f3454..2d72a96ef5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-basic-javascript-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-basic-javascript-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7dac367417b2b2512b73
 title: Create a Basic JavaScript Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301317
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-method-on-an-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-method-on-an-object.english.md
index d443878098..6ad175f181 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-method-on-an-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/create-a-method-on-an-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7dad367417b2b2512b75
 title: Create a Method on an Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301318
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/define-a-constructor-function.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/define-a-constructor-function.english.md
index ff3bc22865..3da1e684c3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/define-a-constructor-function.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/define-a-constructor-function.english.md
@@ -2,6 +2,7 @@
 id: 587d7dad367417b2b2512b77
 title: Define a Constructor Function
 challengeType: 1
+isHidden: false
 forumTopicId: 16804
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/extend-constructors-to-receive-arguments.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/extend-constructors-to-receive-arguments.english.md
index 12464ae840..d442e80d88 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/extend-constructors-to-receive-arguments.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/extend-constructors-to-receive-arguments.english.md
@@ -2,6 +2,7 @@
 id: 587d7dae367417b2b2512b79
 title: Extend Constructors to Receive Arguments
 challengeType: 1
+isHidden: false
 forumTopicId: 18235
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
index 9554a33f7d..5481a68026 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/inherit-behaviors-from-a-supertype.english.md
@@ -2,6 +2,7 @@
 id: 587d7db0367417b2b2512b84
 title: Inherit Behaviors from a Supertype
 challengeType: 1
+isHidden: false
 forumTopicId: 301319
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/iterate-over-all-properties.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/iterate-over-all-properties.english.md
index 36755290c3..42816f1872 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/iterate-over-all-properties.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/iterate-over-all-properties.english.md
@@ -2,6 +2,7 @@
 id: 587d7daf367417b2b2512b7d
 title: Iterate Over All Properties
 challengeType: 1
+isHidden: false
 forumTopicId: 301320
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/make-code-more-reusable-with-the-this-keyword.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/make-code-more-reusable-with-the-this-keyword.english.md
index e1b67b2c40..5e8413f594 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/make-code-more-reusable-with-the-this-keyword.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/make-code-more-reusable-with-the-this-keyword.english.md
@@ -2,6 +2,7 @@
 id: 587d7dad367417b2b2512b76
 title: Make Code More Reusable with the this Keyword
 challengeType: 1
+isHidden: false
 forumTopicId: 301321
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/override-inherited-methods.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/override-inherited-methods.english.md
index cb14ddb6c2..a1f4ceb8aa 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/override-inherited-methods.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/override-inherited-methods.english.md
@@ -2,6 +2,7 @@
 id: 587d7db1367417b2b2512b88
 title: Override Inherited Methods
 challengeType: 1
+isHidden: false
 forumTopicId: 301322
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/remember-to-set-the-constructor-property-when-changing-the-prototype.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/remember-to-set-the-constructor-property-when-changing-the-prototype.english.md
index 633ebca2b9..fb297ef4f7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/remember-to-set-the-constructor-property-when-changing-the-prototype.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/remember-to-set-the-constructor-property-when-changing-the-prototype.english.md
@@ -2,6 +2,7 @@
 id: 587d7daf367417b2b2512b80
 title: Remember to Set the Constructor Property when Changing the Prototype
 challengeType: 1
+isHidden: false
 forumTopicId: 301323
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/reset-an-inherited-constructor-property.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/reset-an-inherited-constructor-property.english.md
index 3c13320dcf..2df4c373b9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/reset-an-inherited-constructor-property.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/reset-an-inherited-constructor-property.english.md
@@ -2,6 +2,7 @@
 id: 587d7db1367417b2b2512b86
 title: Reset an Inherited Constructor Property
 challengeType: 1
+isHidden: false
 forumTopicId: 301324
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/set-the-childs-prototype-to-an-instance-of-the-parent.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/set-the-childs-prototype-to-an-instance-of-the-parent.english.md
index 41da8f8ac4..e207e6d8be 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/set-the-childs-prototype-to-an-instance-of-the-parent.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/set-the-childs-prototype-to-an-instance-of-the-parent.english.md
@@ -2,6 +2,7 @@
 id: 587d7db1367417b2b2512b85
 title: Set the Child's Prototype to an Instance of the Parent
 challengeType: 1
+isHidden: false
 forumTopicId: 301325
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-own-properties.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-own-properties.english.md
index ab1c8a2446..ad04c6e995 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-own-properties.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-own-properties.english.md
@@ -2,6 +2,7 @@
 id: 587d7dae367417b2b2512b7b
 title: Understand Own Properties
 challengeType: 1
+isHidden: false
 forumTopicId: 301326
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-constructor-property.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-constructor-property.english.md
index 28652884c8..cb492105e8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-constructor-property.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-constructor-property.english.md
@@ -2,6 +2,7 @@
 id: 587d7daf367417b2b2512b7e
 title: Understand the Constructor Property
 challengeType: 1
+isHidden: false
 forumTopicId: 301327
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
index 476119e9b4..d3d7b4a7e9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
@@ -2,6 +2,7 @@
 id: 587d7db2367417b2b2512b8b
 title: Understand the Immediately Invoked Function Expression (IIFE)
 challengeType: 1
+isHidden: false
 forumTopicId: 301328
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-prototype-chain.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-prototype-chain.english.md
index bfd7cfe08f..aafab5114d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-prototype-chain.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-prototype-chain.english.md
@@ -2,6 +2,7 @@
 id: 587d7db0367417b2b2512b82
 title: Understand the Prototype Chain
 challengeType: 1
+isHidden: false
 forumTopicId: 301329
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-where-an-objects-prototype-comes-from.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-where-an-objects-prototype-comes-from.english.md
index da44752c9c..497b66592f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-where-an-objects-prototype-comes-from.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-where-an-objects-prototype-comes-from.english.md
@@ -2,6 +2,7 @@
 id: 587d7db0367417b2b2512b81
 title: Understand Where an Object’s Prototype Comes From
 challengeType: 1
+isHidden: false
 forumTopicId: 301330
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-constructor-to-create-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-constructor-to-create-objects.english.md
index f3717bf661..dc3ed98cb6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-constructor-to-create-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-constructor-to-create-objects.english.md
@@ -2,6 +2,7 @@
 id: 587d7dad367417b2b2512b78
 title: Use a Constructor to Create Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 18233
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-mixin-to-add-common-behavior-between-unrelated-objects.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-mixin-to-add-common-behavior-between-unrelated-objects.english.md
index 093d24cd03..20b5bb3c3b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-mixin-to-add-common-behavior-between-unrelated-objects.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-a-mixin-to-add-common-behavior-between-unrelated-objects.english.md
@@ -2,6 +2,7 @@
 id: 587d7db2367417b2b2512b89
 title: Use a Mixin to Add Common Behavior Between Unrelated Objects
 challengeType: 1
+isHidden: false
 forumTopicId: 301331
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-an-iife-to-create-a-module.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-an-iife-to-create-a-module.english.md
index d31a3e21c9..c33957e481 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-an-iife-to-create-a-module.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-an-iife-to-create-a-module.english.md
@@ -2,6 +2,7 @@
 id: 587d7db2367417b2b2512b8c
 title: Use an IIFE to Create a Module
 challengeType: 1
+isHidden: false
 forumTopicId: 301332
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.english.md
index 42047216fc..d169227575 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.english.md
@@ -2,6 +2,7 @@
 id: 587d7db2367417b2b2512b8a
 title: Use Closure to Protect Properties Within an Object from Being Modified Externally
 challengeType: 1
+isHidden: false
 forumTopicId: 18234
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-dot-notation-to-access-the-properties-of-an-object.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-dot-notation-to-access-the-properties-of-an-object.english.md
index 61f9c93fef..62bf9b2eed 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-dot-notation-to-access-the-properties-of-an-object.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-dot-notation-to-access-the-properties-of-an-object.english.md
@@ -2,6 +2,7 @@
 id: 587d7dac367417b2b2512b74
 title: Use Dot Notation to Access the Properties of an Object
 challengeType: 1
+isHidden: false
 forumTopicId: 301333
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-inheritance-so-you-dont-repeat-yourself.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-inheritance-so-you-dont-repeat-yourself.english.md
index 9c9a6aef81..a839ff8eeb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-inheritance-so-you-dont-repeat-yourself.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-inheritance-so-you-dont-repeat-yourself.english.md
@@ -2,6 +2,7 @@
 id: 587d7db0367417b2b2512b83
 title: Use Inheritance So You Don't Repeat Yourself
 challengeType: 1
+isHidden: false
 forumTopicId: 301334
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-prototype-properties-to-reduce-duplicate-code.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-prototype-properties-to-reduce-duplicate-code.english.md
index 3a158e252d..83d4f10f97 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-prototype-properties-to-reduce-duplicate-code.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-prototype-properties-to-reduce-duplicate-code.english.md
@@ -2,6 +2,7 @@
 id: 587d7dae367417b2b2512b7c
 title: Use Prototype Properties to Reduce Duplicate Code
 challengeType: 1
+isHidden: false
 forumTopicId: 301336
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/verify-an-objects-constructor-with-instanceof.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/verify-an-objects-constructor-with-instanceof.english.md
index 4aea7e6904..b3c67ef1b7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/verify-an-objects-constructor-with-instanceof.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/verify-an-objects-constructor-with-instanceof.english.md
@@ -2,6 +2,7 @@
 id: 587d7dae367417b2b2512b7a
 title: Verify an Object's Constructor with instanceof
 challengeType: 1
+isHidden: false
 forumTopicId: 301337
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-all-or-none.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-all-or-none.english.md
index 100473323e..0f64fdbdfe 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-all-or-none.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-all-or-none.english.md
@@ -2,6 +2,7 @@
 id: 587d7dba367417b2b2512ba8
 title: Check for All or None
 challengeType: 1
+isHidden: false
 forumTopicId: 301338
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-mixed-grouping-of-characters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-mixed-grouping-of-characters.english.md
index fa707aa514..27bc7956df 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-mixed-grouping-of-characters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/check-for-mixed-grouping-of-characters.english.md
@@ -2,6 +2,7 @@
 id: 5c3dda8b4d8df89bea71600f
 title: Check For Mixed Grouping of Characters
 challengeType: 1
+isHidden: false
 forumTopicId: 301339
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.english.md
index 5b7a7dcba6..9949f12213 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.english.md
@@ -2,6 +2,7 @@
 id: 587d7db4367417b2b2512b92
 title: Extract Matches
 challengeType: 1
+isHidden: false
 forumTopicId: 301340
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-characters-with-lazy-matching.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-characters-with-lazy-matching.english.md
index 5b4cf52e63..b65c5470a0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-characters-with-lazy-matching.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-characters-with-lazy-matching.english.md
@@ -2,6 +2,7 @@
 id: 587d7db6367417b2b2512b9b
 title: Find Characters with Lazy Matching
 challengeType: 1
+isHidden: false
 forumTopicId: 301341
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-more-than-the-first-match.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-more-than-the-first-match.english.md
index 65e6e1ec5b..0a8df270a5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-more-than-the-first-match.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-more-than-the-first-match.english.md
@@ -2,6 +2,7 @@
 id: 587d7db4367417b2b2512b93
 title: Find More Than the First Match
 challengeType: 1
+isHidden: false
 forumTopicId: 301342
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-one-or-more-criminals-in-a-hunt.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-one-or-more-criminals-in-a-hunt.english.md
index 5d99506be8..c2548bbdf3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-one-or-more-criminals-in-a-hunt.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/find-one-or-more-criminals-in-a-hunt.english.md
@@ -2,6 +2,7 @@
 id: 587d7db7367417b2b2512b9c
 title: Find One or More Criminals in a Hunt
 challengeType: 1
+isHidden: false
 forumTopicId: 301343
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/ignore-case-while-matching.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/ignore-case-while-matching.english.md
index b5556fdfa8..6eae4f337e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/ignore-case-while-matching.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/ignore-case-while-matching.english.md
@@ -2,6 +2,7 @@
 id: 587d7db4367417b2b2512b91
 title: Ignore Case While Matching
 challengeType: 1
+isHidden: false
 forumTopicId: 301344
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-a-literal-string-with-different-possibilities.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-a-literal-string-with-different-possibilities.english.md
index 6e3ce62c66..20d657bf1e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-a-literal-string-with-different-possibilities.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-a-literal-string-with-different-possibilities.english.md
@@ -2,6 +2,7 @@
 id: 587d7db4367417b2b2512b90
 title: Match a Literal String with Different Possibilities
 challengeType: 1
+isHidden: false
 forumTopicId: 301345
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-letters-and-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-letters-and-numbers.english.md
index b70aa5a375..a196f35eaf 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-letters-and-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-letters-and-numbers.english.md
@@ -2,6 +2,7 @@
 id: 587d7db7367417b2b2512b9f
 title: Match All Letters and Numbers
 challengeType: 1
+isHidden: false
 forumTopicId: 301346
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-non-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-non-numbers.english.md
index aba3730e70..adab0eefd7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-non-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-non-numbers.english.md
@@ -2,6 +2,7 @@
 id: 587d7db8367417b2b2512ba1
 title: Match All Non-Numbers
 challengeType: 1
+isHidden: false
 forumTopicId: 301347
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-numbers.english.md
index 30c5665a01..ab5c08be55 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-numbers.english.md
@@ -2,6 +2,7 @@
 id: 5d712346c441eddfaeb5bdef
 title: Match All Numbers
 challengeType: 1
+isHidden: false
 forumTopicId: 18181
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-anything-with-wildcard-period.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-anything-with-wildcard-period.english.md
index f7c1f45aca..0a46ce9b96 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-anything-with-wildcard-period.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-anything-with-wildcard-period.english.md
@@ -2,6 +2,7 @@
 id: 587d7db5367417b2b2512b94
 title: Match Anything with Wildcard Period
 challengeType: 1
+isHidden: false
 forumTopicId: 301348
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-beginning-string-patterns.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-beginning-string-patterns.english.md
index 53cec980b7..3be81e833e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-beginning-string-patterns.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-beginning-string-patterns.english.md
@@ -2,6 +2,7 @@
 id: 587d7db7367417b2b2512b9d
 title: Match Beginning String Patterns
 challengeType: 1
+isHidden: false
 forumTopicId: 301349
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-one-or-more-times.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-one-or-more-times.english.md
index 06b035f4bd..3593dd0dd1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-one-or-more-times.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-one-or-more-times.english.md
@@ -2,6 +2,7 @@
 id: 587d7db6367417b2b2512b99
 title: Match Characters that Occur One or More Times
 challengeType: 1
+isHidden: false
 forumTopicId: 301350
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-zero-or-more-times.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-zero-or-more-times.english.md
index 6a7002db80..e034def709 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-zero-or-more-times.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-characters-that-occur-zero-or-more-times.english.md
@@ -2,6 +2,7 @@
 id: 587d7db6367417b2b2512b9a
 title: Match Characters that Occur Zero or More Times
 challengeType: 1
+isHidden: false
 forumTopicId: 301351
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.english.md
index 686bb9191b..7f76b808cf 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.english.md
@@ -2,6 +2,7 @@
 id: 587d7db7367417b2b2512b9e
 title: Match Ending String Patterns
 challengeType: 1
+isHidden: false
 forumTopicId: 301352
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-everything-but-letters-and-numbers.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-everything-but-letters-and-numbers.english.md
index a6cc0ee91a..7aaaa5072f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-everything-but-letters-and-numbers.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-everything-but-letters-and-numbers.english.md
@@ -2,6 +2,7 @@
 id: 587d7db8367417b2b2512ba0
 title: Match Everything But Letters and Numbers
 challengeType: 1
+isHidden: false
 forumTopicId: 301353
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-letters-of-the-alphabet.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-letters-of-the-alphabet.english.md
index 021113a0b6..19cfd022ee 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-letters-of-the-alphabet.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-letters-of-the-alphabet.english.md
@@ -2,6 +2,7 @@
 id: 587d7db5367417b2b2512b96
 title: Match Letters of the Alphabet
 challengeType: 1
+isHidden: false
 forumTopicId: 301354
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-literal-strings.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-literal-strings.english.md
index 7cbe69b4ce..32e82b7772 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-literal-strings.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-literal-strings.english.md
@@ -2,6 +2,7 @@
 id: 587d7db3367417b2b2512b8f
 title: Match Literal Strings
 challengeType: 1
+isHidden: false
 forumTopicId: 301355
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters.english.md
index 1155d2a366..fae1964465 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters.english.md
@@ -2,6 +2,7 @@
 id: 587d7db9367417b2b2512ba4
 title: Match Non-Whitespace Characters
 challengeType: 1
+isHidden: false
 forumTopicId: 18210
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-numbers-and-letters-of-the-alphabet.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-numbers-and-letters-of-the-alphabet.english.md
index 95fc9fd131..8a8133cfdb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-numbers-and-letters-of-the-alphabet.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-numbers-and-letters-of-the-alphabet.english.md
@@ -2,6 +2,7 @@
 id: 587d7db5367417b2b2512b97
 title: Match Numbers and Letters of the Alphabet
 challengeType: 1
+isHidden: false
 forumTopicId: 301356
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-character-with-multiple-possibilities.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-character-with-multiple-possibilities.english.md
index 03392e2558..fabf579756 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-character-with-multiple-possibilities.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-character-with-multiple-possibilities.english.md
@@ -2,6 +2,7 @@
 id: 587d7db5367417b2b2512b95
 title: Match Single Character with Multiple Possibilities
 challengeType: 1
+isHidden: false
 forumTopicId: 301357
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-characters-not-specified.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-characters-not-specified.english.md
index 0f110885b5..07b3ab39c1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-characters-not-specified.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-single-characters-not-specified.english.md
@@ -2,6 +2,7 @@
 id: 587d7db6367417b2b2512b98
 title: Match Single Characters Not Specified
 challengeType: 1
+isHidden: false
 forumTopicId: 301358
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-whitespace.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-whitespace.english.md
index 782640c274..13a74623a0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-whitespace.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-whitespace.english.md
@@ -2,6 +2,7 @@
 id: 587d7db8367417b2b2512ba3
 title: Match Whitespace
 challengeType: 1
+isHidden: false
 forumTopicId: 301359
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead.english.md
index 3d357ac753..57f60d43f1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead.english.md
@@ -2,6 +2,7 @@
 id: 587d7dba367417b2b2512ba9
 title: Positive and Negative Lookahead
 challengeType: 1
+isHidden: false
 forumTopicId: 301360
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/remove-whitespace-from-start-and-end.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/remove-whitespace-from-start-and-end.english.md
index 6c9e330751..ce32b10c22 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/remove-whitespace-from-start-and-end.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/remove-whitespace-from-start-and-end.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbb367417b2b2512bac
 title: Remove Whitespace from Start and End
 challengeType: 1
+isHidden: false
 forumTopicId: 301362
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
index 886d6ab5e3..e20ec1a19e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames.english.md
@@ -2,6 +2,7 @@
 id: 587d7db8367417b2b2512ba2
 title: Restrict Possible Usernames
 challengeType: 1
+isHidden: false
 forumTopicId: 301363
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/reuse-patterns-using-capture-groups.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/reuse-patterns-using-capture-groups.english.md
index 35b3d1079a..ebbc872bcf 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/reuse-patterns-using-capture-groups.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/reuse-patterns-using-capture-groups.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbb367417b2b2512baa
 title: Reuse Patterns Using Capture Groups
 challengeType: 1
+isHidden: false
 forumTopicId: 301364
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches.english.md
index 0aba6737b8..6416958c97 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches.english.md
@@ -2,6 +2,7 @@
 id: 587d7db9367417b2b2512ba7
 title: Specify Exact Number of Matches
 challengeType: 1
+isHidden: false
 forumTopicId: 301365
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-only-the-lower-number-of-matches.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-only-the-lower-number-of-matches.english.md
index 15d26053c0..c6ffe56f59 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-only-the-lower-number-of-matches.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-only-the-lower-number-of-matches.english.md
@@ -2,6 +2,7 @@
 id: 587d7db9367417b2b2512ba6
 title: Specify Only the Lower Number of Matches
 challengeType: 1
+isHidden: false
 forumTopicId: 301366
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-upper-and-lower-number-of-matches.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-upper-and-lower-number-of-matches.english.md
index c5e5deb627..85701c0897 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-upper-and-lower-number-of-matches.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/specify-upper-and-lower-number-of-matches.english.md
@@ -2,6 +2,7 @@
 id: 587d7db9367417b2b2512ba5
 title: Specify Upper and Lower Number of Matches
 challengeType: 1
+isHidden: false
 forumTopicId: 301367
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/use-capture-groups-to-search-and-replace.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/use-capture-groups-to-search-and-replace.english.md
index 084ebde896..1f864a8ff1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/use-capture-groups-to-search-and-replace.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/use-capture-groups-to-search-and-replace.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbb367417b2b2512bab
 title: Use Capture Groups to Search and Replace
 challengeType: 1
+isHidden: false
 forumTopicId: 301368
 ---
 
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method.english.md
index 12c2a33dcc..5158b1af10 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7db3367417b2b2512b8e
 title: Using the Test Method
 challengeType: 1
+isHidden: false
 forumTopicId: 301369
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-elements-within-your-bootstrap-wells.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-elements-within-your-bootstrap-wells.english.md
index f07d7a5df5..9865f247e8 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-elements-within-your-bootstrap-wells.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-elements-within-your-bootstrap-wells.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908849
 title: Add Elements within Your Bootstrap Wells
 challengeType: 0
+isHidden: false
 forumTopicId: 16636
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.english.md
index 891cf0161c..f8aeb78a85 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 16637
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.english.md
index 46d5d8bf9b..4f0dd0be73 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 16638
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-id-attributes-to-bootstrap-elements.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-id-attributes-to-bootstrap-elements.english.md
index 192deab591..96c9e21f7f 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-id-attributes-to-bootstrap-elements.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/add-id-attributes-to-bootstrap-elements.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908853
 title: Add id Attributes to Bootstrap Elements
 challengeType: 0
+isHidden: false
 forumTopicId: 16639
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/apply-the-default-bootstrap-button-style.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/apply-the-default-bootstrap-button-style.english.md
index 79ad0fd819..b04847d67d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/apply-the-default-bootstrap-button-style.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/apply-the-default-bootstrap-button-style.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908850
 title: Apply the Default Bootstrap Button Style
 challengeType: 0
+isHidden: false
 forumTopicId: 16657
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/call-out-optional-actions-with-btn-info.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/call-out-optional-actions-with-btn-info.english.md
index 854af35892..1b122ed810 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/call-out-optional-actions-with-btn-info.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/call-out-optional-actions-with-btn-info.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348cd8acef08813
 title: Call out Optional Actions with btn-info
 challengeType: 0
+isHidden: false
 forumTopicId: 16770
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/center-text-with-bootstrap.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/center-text-with-bootstrap.english.md
index f8727399c3..7e00543b2b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/center-text-with-bootstrap.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/center-text-with-bootstrap.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd8acde08812
 title: Center Text with Bootstrap
 challengeType: 0
+isHidden: false
 forumTopicId: 16771
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-block-element-bootstrap-button.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-block-element-bootstrap-button.english.md
index e59fa1e473..f43b8ea662 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-block-element-bootstrap-button.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-block-element-bootstrap-button.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348cd8acef08812
 title: Create a Block Element Bootstrap Button
 challengeType: 0
+isHidden: false
 forumTopicId: 16810
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-button.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-button.english.md
index 81fbace766..6728c60c1e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-button.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-button.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348cd8acdf08812
 title: Create a Bootstrap Button
 challengeType: 0
+isHidden: false
 forumTopicId: 16811
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-headline.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-headline.english.md
index 9c787b3df5..9abfec09f0 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-headline.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-headline.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908846
 title: Create a Bootstrap Headline
 challengeType: 0
+isHidden: false
 forumTopicId: 16812
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-row.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-row.english.md
index 5d5e87e84d..8e3e7b2942 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-row.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-bootstrap-row.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9bec908846
 title: Create a Bootstrap Row
 challengeType: 0
+isHidden: false
 forumTopicId: 16813
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.english.md
index 2faa826f27..b35ac8997e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908852
 title: Create a Class to Target with jQuery Selectors
 challengeType: 0
+isHidden: false
 forumTopicId: 16815
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-custom-heading.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-custom-heading.english.md
index a02b8c8b1c..041cc2be3a 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-custom-heading.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-a-custom-heading.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aede08845
 title: Create a Custom Heading
 challengeType: 0
+isHidden: false
 forumTopicId: 16816
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-bootstrap-wells.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-bootstrap-wells.english.md
index dec52f3c7d..c2ba4be8f0 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-bootstrap-wells.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/create-bootstrap-wells.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908848
 title: Create Bootstrap Wells
 challengeType: 0
+isHidden: false
 forumTopicId: 16825
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/ditch-custom-css-for-bootstrap.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/ditch-custom-css-for-bootstrap.english.md
index a890e8ac91..794c0e60ed 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/ditch-custom-css-for-bootstrap.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/ditch-custom-css-for-bootstrap.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1347bd9aedf08845
 title: Ditch Custom CSS for Bootstrap
 challengeType: 0
+isHidden: false
 forumTopicId: 17565
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/give-each-element-a-unique-id.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/give-each-element-a-unique-id.english.md
index 9830eed1fb..bd6b227a40 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/give-each-element-a-unique-id.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/give-each-element-a-unique-id.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908855
 title: Give Each Element a Unique id
 challengeType: 0
+isHidden: false
 forumTopicId: 18191
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/house-our-page-within-a-bootstrap-container-fluid-div.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/house-our-page-within-a-bootstrap-container-fluid-div.english.md
index 04e975b0b3..1eb57e11dc 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/house-our-page-within-a-bootstrap-container-fluid-div.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/house-our-page-within-a-bootstrap-container-fluid-div.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908746
 title: House our page within a Bootstrap container-fluid div
 challengeType: 0
+isHidden: false
 forumTopicId: 18198
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-buttons.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-buttons.english.md
index 5f70705406..163a307d40 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-buttons.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-buttons.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908856
 title: Label Bootstrap Buttons
 challengeType: 0
+isHidden: false
 forumTopicId: 18222
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-wells.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-wells.english.md
index 5efa016085..1b6a6cfb7b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-wells.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/label-bootstrap-wells.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908854
 title: Label Bootstrap Wells
 challengeType: 0
+isHidden: false
 forumTopicId: 18223
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.english.md
index cf5b1422ff..05642ad822 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 18225
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/make-images-mobile-responsive.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/make-images-mobile-responsive.english.md
index 05b5d38427..c550dc9771 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/make-images-mobile-responsive.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/make-images-mobile-responsive.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9acde08812
 title: Make Images Mobile Responsive
 challengeType: 0
+isHidden: false
 forumTopicId: 18232
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-checkboxes.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-checkboxes.english.md
index 6e51102924..c7e0a6a67d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-checkboxes.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-checkboxes.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 18269
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-radio-buttons.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-radio-buttons.english.md
index 2aa4c05f23..f4c18ba0fb 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-radio-buttons.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/responsively-style-radio-buttons.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 18270
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/split-your-bootstrap-row.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/split-your-bootstrap-row.english.md
index a6c45188c2..5a67ef7355 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/split-your-bootstrap-row.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/split-your-bootstrap-row.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908847
 title: Split Your Bootstrap Row
 challengeType: 0
+isHidden: false
 forumTopicId: 18306
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/style-text-inputs-as-form-controls.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/style-text-inputs-as-form-controls.english.md
index 465bd96489..b155b48368 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/style-text-inputs-as-form-controls.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/style-text-inputs-as-form-controls.english.md
@@ -5,6 +5,7 @@ required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css'
     raw: true
 challengeType: 0
+isHidden: false
 forumTopicId: 18312
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/taste-the-bootstrap-button-color-rainbow.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/taste-the-bootstrap-button-color-rainbow.english.md
index 90be2d273e..c6c3503fa5 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/taste-the-bootstrap-button-color-rainbow.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/taste-the-bootstrap-button-color-rainbow.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348cd8acef08811
 title: Taste the Bootstrap Button Color Rainbow
 challengeType: 0
+isHidden: false
 forumTopicId: 18323
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-a-span-to-target-inline-elements.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-a-span-to-target-inline-elements.english.md
index 7e997defbe..c8c1d308aa 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-a-span-to-target-inline-elements.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-a-span-to-target-inline-elements.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aedf08845
 title: Use a span to Target Inline Elements
 challengeType: 0
+isHidden: false
 forumTopicId: 18370
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-comments-to-clarify-code.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-comments-to-clarify-code.english.md
index 9d868483c0..f67f8f6aa6 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-comments-to-clarify-code.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-comments-to-clarify-code.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aec908857
 title: Use Comments to Clarify Code
 challengeType: 0
+isHidden: false
 forumTopicId: 18347
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-responsive-design-with-bootstrap-fluid-containers.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-responsive-design-with-bootstrap-fluid-containers.english.md
index d914ba62ad..286fdf3802 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-responsive-design-with-bootstrap-fluid-containers.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-responsive-design-with-bootstrap-fluid-containers.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9acde08712
 title: Use Responsive Design with Bootstrap Fluid Containers
 challengeType: 0
+isHidden: false
 forumTopicId: 18362
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.english.md
index 43612b93f0..320dc0f415 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.english.md
@@ -2,6 +2,7 @@
 id: bad88fee1348ce8acef08815
 title: Use the Bootstrap Grid to Put Elements Side By Side
 challengeType: 0
+isHidden: false
 forumTopicId: 18371
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.english.md b/curriculum/challenges/english/03-front-end-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.english.md
index b5a126e7ec..a176b2ed2b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348ce8acef08814
 title: Warn Your Users of a Dangerous Action with btn-danger
 challengeType: 0
+isHidden: false
 forumTopicId: 18375
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-drum-machine.english.md b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-drum-machine.english.md
index 8d825d1dc4..f907bf7ba4 100644
--- a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-drum-machine.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-drum-machine.english.md
@@ -3,6 +3,7 @@ id: 587d7dbc367417b2b2512bae
 title: Build a Drum Machine
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301370
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-javascript-calculator.english.md b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-javascript-calculator.english.md
index 5d46066a02..210b165b2c 100644
--- a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-javascript-calculator.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-javascript-calculator.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eddfaeb5bd17
 title: Build a JavaScript Calculator
 challengeType: 3
+isHidden: false
 isRequired: true
 forumTopicId: 301371
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-markdown-previewer.english.md b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-markdown-previewer.english.md
index 5387d7d4cb..63034afcf7 100644
--- a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-markdown-previewer.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-markdown-previewer.english.md
@@ -3,6 +3,7 @@ id: bd7157d8c242eddfaeb5bd13
 title: Build a Markdown Previewer
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301372
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-pomodoro-clock.english.md b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-pomodoro-clock.english.md
index 41cba429a7..d4bf4cf5d9 100644
--- a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-pomodoro-clock.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-pomodoro-clock.english.md
@@ -3,6 +3,7 @@ id: bd7158d8c442eddfaeb5bd0f
 title: Build a Pomodoro Clock
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301373
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-random-quote-machine.english.md b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-random-quote-machine.english.md
index fb080a0d0d..40b032cc12 100644
--- a/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-random-quote-machine.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/front-end-libraries-projects/build-a-random-quote-machine.english.md
@@ -3,6 +3,7 @@ id: bd7158d8c442eddfaeb5bd13
 title: Build a Random Quote Machine
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301374
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/change-text-inside-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/change-text-inside-an-element-using-jquery.english.md
index 76cdf04454..12e1cc84a8 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/change-text-inside-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/change-text-inside-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: 564944c91be2204b269d51e3
 title: Change Text Inside an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 16773
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/change-the-css-of-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/change-the-css-of-an-element-using-jquery.english.md
index 9e4b8c4022..63cd19727d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/change-the-css-of-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/change-the-css-of-an-element-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Change the CSS of an Element Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 16776
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/clone-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/clone-an-element-using-jquery.english.md
index d779df304a..d6dc88a67d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/clone-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/clone-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed508826
 title: Clone an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 16780
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/delete-your-jquery-functions.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/delete-your-jquery-functions.english.md
index d0c55db6b0..9382b29465 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/delete-your-jquery-functions.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/delete-your-jquery-functions.english.md
@@ -4,6 +4,7 @@ title: Delete Your jQuery Functions
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 17561
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/disable-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/disable-an-element-using-jquery.english.md
index 541bae5bee..27fa677670 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/disable-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/disable-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed808826
 title: Disable an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 17563
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/learn-how-script-tags-and-document-ready-work.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/learn-how-script-tags-and-document-ready-work.english.md
index ca28a3f128..ea37e27b6b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/learn-how-script-tags-and-document-ready-work.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/learn-how-script-tags-and-document-ready-work.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9acdd08826
 title: Learn How Script Tags and Document Ready Work
 challengeType: 6
+isHidden: false
 forumTopicId: 18224
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/remove-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/remove-an-element-using-jquery.english.md
index 4a84648126..ec32f01ff3 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/remove-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/remove-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed708826
 title: Remove an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 18262
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/remove-classes-from-an-element-with-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/remove-classes-from-an-element-with-jquery.english.md
index 08ae77ab77..0aaba9b1b8 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/remove-classes-from-an-element-with-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/remove-classes-from-an-element-with-jquery.english.md
@@ -4,6 +4,7 @@ title: Remove Classes from an Element with jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18264
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.english.md
index e3d1de674b..9a3386d2f9 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Target a Specific Child of an Element Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18315
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-class-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-class-using-jquery.english.md
index 31f19497d6..5fa2319cad 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-class-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-class-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Target Elements by Class Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18316
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-id-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-id-using-jquery.english.md
index b4252963ec..54855fe3a7 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-id-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-elements-by-id-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Target Elements by id Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18317
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-even-elements-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-even-elements-using-jquery.english.md
index a2a5cc2da6..535467110e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-even-elements-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-even-elements-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Target Even Elements Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18318
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-html-elements-with-selectors-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-html-elements-with-selectors-using-jquery.english.md
index f7a46328e3..b3fc383d41 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-html-elements-with-selectors-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-html-elements-with-selectors-using-jquery.english.md
@@ -4,6 +4,7 @@ title: Target HTML Elements with Selectors Using jQuery
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18319
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-children-of-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-children-of-an-element-using-jquery.english.md
index 2c9eed98ea..7a7f3278d1 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-children-of-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-children-of-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed208826
 title: Target the Children of an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 18320
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-parent-of-an-element-using-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-parent-of-an-element-using-jquery.english.md
index 1d63b77255..0c7e19f80c 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-parent-of-an-element-using-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-parent-of-an-element-using-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed308826
 title: Target the Parent of an Element Using jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 18321
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.english.md
index 082ce97302..961f8285c3 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.english.md
@@ -4,6 +4,7 @@ title: Target the Same Element with Multiple jQuery Selectors
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18322
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/use-appendto-to-move-elements-with-jquery.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/use-appendto-to-move-elements-with-jquery.english.md
index d937ee8f3a..da506675ed 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/use-appendto-to-move-elements-with-jquery.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/use-appendto-to-move-elements-with-jquery.english.md
@@ -2,6 +2,7 @@
 id: bad87fee1348bd9aed608826
 title: Use appendTo to Move Elements with jQuery
 challengeType: 6
+isHidden: false
 forumTopicId: 18340
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/jquery/use-jquery-to-modify-the-entire-page.english.md b/curriculum/challenges/english/03-front-end-libraries/jquery/use-jquery-to-modify-the-entire-page.english.md
index 7f9f6e46b2..5c66da1857 100644
--- a/curriculum/challenges/english/03-front-end-libraries/jquery/use-jquery-to-modify-the-entire-page.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/jquery/use-jquery-to-modify-the-entire-page.english.md
@@ -4,6 +4,7 @@ title: Use jQuery to Modify the Entire Page
 required:
   - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 challengeType: 6
+isHidden: false
 forumTopicId: 18361
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-react.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-react.english.md
index a8ad10146b..504ea4f5fa 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-react.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-react.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036147
 title: Connect Redux to React
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301426
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-the-messages-app.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-the-messages-app.english.md
index f8f5fab8ca..0aa0f224d7 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-the-messages-app.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/connect-redux-to-the-messages-app.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036148
 title: Connect Redux to the Messages App
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301427
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-local-state-into-redux.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-local-state-into-redux.english.md
index 2cf81634b7..414c65c665 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-local-state-into-redux.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-local-state-into-redux.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036149
 title: Extract Local State into Redux
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301428
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-state-logic-to-redux.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-state-logic-to-redux.english.md
index 974e174713..3063b73ed0 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-state-logic-to-redux.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/extract-state-logic-to-redux.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036143
 title: Extract State Logic to Redux
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301429
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/getting-started-with-react-redux.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/getting-started-with-react-redux.english.md
index dfeaa07d2e..0c800f58de 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/getting-started-with-react-redux.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/getting-started-with-react-redux.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036141
 title: Getting Started with React Redux
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301430
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/manage-state-locally-first.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/manage-state-locally-first.english.md
index 6bc4bbef81..4b932760ec 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/manage-state-locally-first.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/manage-state-locally-first.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036142
 title: Manage State Locally First
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301431
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-dispatch-to-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-dispatch-to-props.english.md
index 23ece6dc14..d517d364a3 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-dispatch-to-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-dispatch-to-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036146
 title: Map Dispatch to Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301432
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-state-to-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-state-to-props.english.md
index 4126a83aae..ea32371868 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-state-to-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/map-state-to-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036145
 title: Map State to Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301433
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/moving-forward-from-here.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/moving-forward-from-here.english.md
index 81ab835b4a..292c3b5fe0 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/moving-forward-from-here.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/moving-forward-from-here.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614a
 title: Moving Forward From Here
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301434
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/use-provider-to-connect-redux-to-react.english.md b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/use-provider-to-connect-redux-to-react.english.md
index 4b7ccd842b..d0c2134711 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react-and-redux/use-provider-to-connect-redux-to-react.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react-and-redux/use-provider-to-connect-redux-to-react.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036144
 title: Use Provider to Connect Redux to React
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301435
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.english.md
index a6adbaac88..a14ae9d44b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616e
 title: Access Props Using this.props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301375
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/add-comments-in-jsx.english.md b/curriculum/challenges/english/03-front-end-libraries/react/add-comments-in-jsx.english.md
index 58f6f21d8b..c2bc4f6d52 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/add-comments-in-jsx.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/add-comments-in-jsx.english.md
@@ -2,6 +2,7 @@
 id: 5a24bbe0dba28a8d3cbd4c5e
 title: Add Comments in JSX
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301376
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/add-event-listeners.english.md b/curriculum/challenges/english/03-front-end-libraries/react/add-event-listeners.english.md
index f5767cffd2..4c3f1fc13c 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/add-event-listeners.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/add-event-listeners.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403617e
 title: Add Event Listeners
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301377
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/add-inline-styles-in-react.english.md b/curriculum/challenges/english/03-front-end-libraries/react/add-inline-styles-in-react.english.md
index 99de1833bc..855b11038c 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/add-inline-styles-in-react.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/add-inline-styles-in-react.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036182
 title: Add Inline Styles in React
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301378
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/bind-this-to-a-class-method.english.md b/curriculum/challenges/english/03-front-end-libraries/react/bind-this-to-a-class-method.english.md
index 8e29ff086c..c80200fa9a 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/bind-this-to-a-class-method.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/bind-this-to-a-class-method.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036174
 title: Bind 'this' to a Class Method
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301379
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/change-inline-css-conditionally-based-on-component-state.english.md b/curriculum/challenges/english/03-front-end-libraries/react/change-inline-css-conditionally-based-on-component-state.english.md
index c70087c378..f7555b36ce 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/change-inline-css-conditionally-based-on-component-state.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/change-inline-css-conditionally-based-on-component-state.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036189
 title: Change Inline CSS Conditionally Based on Component State
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301380
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/compose-react-components.english.md b/curriculum/challenges/english/03-front-end-libraries/react/compose-react-components.english.md
index 39ed995f2c..091553153e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/compose-react-components.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/compose-react-components.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036166
 title: Compose React Components
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301381
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-complex-jsx-element.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-complex-jsx-element.english.md
index d128b1c52f..a87e48697e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-complex-jsx-element.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-complex-jsx-element.english.md
@@ -2,6 +2,7 @@
 id: 5a24bbe0dba28a8d3cbd4c5d
 title: Create a Complex JSX Element
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301382
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-component-with-composition.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-component-with-composition.english.md
index d15b8df6b9..fb7cf53fca 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-component-with-composition.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-component-with-composition.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036164
 title: Create a Component with Composition
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301383
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-form.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-form.english.md
index f54d3cecd3..9b8bc97bc4 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-form.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-form.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036179
 title: Create a Controlled Form
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301384
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-input.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-input.english.md
index ba636795d7..a1196f3511 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-input.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-controlled-input.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036178
 title: Create a Controlled Input
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301385
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-react-component.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-react-component.english.md
index 9ce563e693..351f95bb05 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-react-component.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-react-component.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036163
 title: Create a React Component
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301386
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-simple-jsx-element.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-simple-jsx-element.english.md
index 88f4f5cafd..bf76d96305 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-simple-jsx-element.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-simple-jsx-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbc367417b2b2512bb1
 title: Create a Simple JSX Element
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301390
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateful-component.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateful-component.english.md
index 638d733e9e..f20565d1fc 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateful-component.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateful-component.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036170
 title: Create a Stateful Component
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301391
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateless-functional-component.english.md b/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateless-functional-component.english.md
index 82cefd8198..8e5d2c7656 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateless-functional-component.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/create-a-stateless-functional-component.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036162
 title: Create a Stateless Functional Component
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301392
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/define-an-html-class-in-jsx.english.md b/curriculum/challenges/english/03-front-end-libraries/react/define-an-html-class-in-jsx.english.md
index 180873055e..c9d85074ae 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/define-an-html-class-in-jsx.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/define-an-html-class-in-jsx.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036160
 title: Define an HTML Class in JSX
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301393
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md b/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
index b27a20394d..4d8b349321 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403618b
 title: Give Sibling Elements a Unique Key Attribute
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301394
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/introducing-inline-styles.english.md b/curriculum/challenges/english/03-front-end-libraries/react/introducing-inline-styles.english.md
index b749709fd3..27fd0bafc6 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/introducing-inline-styles.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/introducing-inline-styles.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036181
 title: Introducing Inline Styles
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301395
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/learn-about-self-closing-jsx-tags.english.md b/curriculum/challenges/english/03-front-end-libraries/react/learn-about-self-closing-jsx-tags.english.md
index 3b751ac1e0..7baa55975a 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/learn-about-self-closing-jsx-tags.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/learn-about-self-closing-jsx-tags.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036161
 title: Learn About Self-Closing JSX Tags
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301396
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/optimize-re-renders-with-shouldcomponentupdate.english.md b/curriculum/challenges/english/03-front-end-libraries/react/optimize-re-renders-with-shouldcomponentupdate.english.md
index 8f15053042..047da6e0fa 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/optimize-re-renders-with-shouldcomponentupdate.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/optimize-re-renders-with-shouldcomponentupdate.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036180
 title: Optimize Re-Renders with shouldComponentUpdate
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301398
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/override-default-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/override-default-props.english.md
index 4bfe3495e3..b39bf06adb 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/override-default-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/override-default-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616c
 title: Override Default Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301399
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/pass-a-callback-as-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/pass-a-callback-as-props.english.md
index 7f6d11ac64..8ac8fe1bd9 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/pass-a-callback-as-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/pass-a-callback-as-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403617b
 title: Pass a Callback as Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301400
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/pass-an-array-as-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/pass-an-array-as-props.english.md
index 39fec802d6..27f783065d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/pass-an-array-as-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/pass-an-array-as-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616a
 title: Pass an Array as Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301401
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/pass-props-to-a-stateless-functional-component.english.md b/curriculum/challenges/english/03-front-end-libraries/react/pass-props-to-a-stateless-functional-component.english.md
index 309767753a..02c8970aff 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/pass-props-to-a-stateless-functional-component.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/pass-props-to-a-stateless-functional-component.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036169
 title: Pass Props to a Stateless Functional Component
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301402
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/pass-state-as-props-to-child-components.english.md b/curriculum/challenges/english/03-front-end-libraries/react/pass-state-as-props-to-child-components.english.md
index aeb220c4d9..e25051596c 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/pass-state-as-props-to-child-components.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/pass-state-as-props-to-child-components.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403617a
 title: Pass State as Props to Child Components
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301403
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-a-class-component-to-the-dom.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-a-class-component-to-the-dom.english.md
index 878027ccd9..2b0b3e2787 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-a-class-component-to-the-dom.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-a-class-component-to-the-dom.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036167
 title: Render a Class Component to the DOM
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301404
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-conditionally-from-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-conditionally-from-props.english.md
index b9960aefe2..29fd0f012d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-conditionally-from-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-conditionally-from-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036188
 title: Render Conditionally from Props
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301405
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-html-elements-to-the-dom.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-html-elements-to-the-dom.english.md
index c99700fa36..a9822ada45 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-html-elements-to-the-dom.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-html-elements-to-the-dom.english.md
@@ -2,6 +2,7 @@
 id: 5a24bbe0dba28a8d3cbd4c5f
 title: Render HTML Elements to the DOM
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301406
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-react-on-the-server-with-rendertostring.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-react-on-the-server-with-rendertostring.english.md
index 2c210a68f0..e02028b358 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-react-on-the-server-with-rendertostring.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-react-on-the-server-with-rendertostring.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403618d
 title: Render React on the Server with renderToString
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301407
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface-another-way.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface-another-way.english.md
index 82a2fc86c3..06dc0f92e4 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface-another-way.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface-another-way.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036172
 title: Render State in the User Interface Another Way
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301408
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface.english.md
index b37fa34621..ce2d6dd472 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-state-in-the-user-interface.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036171
 title: Render State in the User Interface
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301409
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/render-with-an-if-else-condition.english.md b/curriculum/challenges/english/03-front-end-libraries/react/render-with-an-if-else-condition.english.md
index a1593b8b66..201273a35f 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/render-with-an-if-else-condition.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/render-with-an-if-else-condition.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036184
 title: Render with an If-Else Condition
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301410
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/review-using-props-with-stateless-functional-components.english.md b/curriculum/challenges/english/03-front-end-libraries/react/review-using-props-with-stateless-functional-components.english.md
index 434d099fcd..904fd48483 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/review-using-props-with-stateless-functional-components.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/review-using-props-with-stateless-functional-components.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616f
 title: Review Using Props with Stateless Functional Components
 challengeType: 6
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 isRequired: false
 forumTopicId: 301411
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/set-state-with-this.setstate.english.md b/curriculum/challenges/english/03-front-end-libraries/react/set-state-with-this.setstate.english.md
index fae909c0d9..ea6c6268e3 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/set-state-with-this.setstate.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/set-state-with-this.setstate.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036173
 title: Set State with this.setState
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301412
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use--for-a-more-concise-conditional.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use--for-a-more-concise-conditional.english.md
index 4f82ee2bb5..e86e321838 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use--for-a-more-concise-conditional.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use--for-a-more-concise-conditional.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036185
 title: Use && for a More Concise Conditional
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301413
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-a-ternary-expression-for-conditional-rendering.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-a-ternary-expression-for-conditional-rendering.english.md
index 8d54074bd1..1a12d74dfb 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-a-ternary-expression-for-conditional-rendering.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-a-ternary-expression-for-conditional-rendering.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036187
 title: Use a Ternary Expression for Conditional Rendering
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301414
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-advanced-javascript-in-react-render-method.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-advanced-javascript-in-react-render-method.english.md
index 84e7cc543b..a2caf192a2 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-advanced-javascript-in-react-render-method.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-advanced-javascript-in-react-render-method.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036183
 title: Use Advanced JavaScript in React Render Method
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301415
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-array.filter-to-dynamically-filter-an-array.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-array.filter-to-dynamically-filter-an-array.english.md
index 621dc62857..9366e7cf07 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-array.filter-to-dynamically-filter-an-array.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-array.filter-to-dynamically-filter-an-array.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403618c
 title: Use Array.filter() to Dynamically Filter an Array
 challengeType: 6
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 forumTopicId: 301416
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-array.map-to-dynamically-render-elements.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-array.map-to-dynamically-render-elements.english.md
index e1dc977757..39572520ff 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-array.map-to-dynamically-render-elements.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-array.map-to-dynamically-render-elements.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403618a
 title: Use Array.map() to Dynamically Render Elements
 challengeType: 6
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 forumTopicId: 301417
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-default-props.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-default-props.english.md
index c5f404a145..5bcadf9407 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-default-props.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-default-props.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616b
 title: Use Default Props
 challengeType: 6
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 forumTopicId: 301418
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-proptypes-to-define-the-props-you-expect.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-proptypes-to-define-the-props-you-expect.english.md
index d95c26a3fa..bb84054de3 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-proptypes-to-define-the-props-you-expect.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-proptypes-to-define-the-props-you-expect.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403616d
 title: Use PropTypes to Define the Props You Expect
 challengeType: 6
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 forumTopicId: 301419
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-react-to-render-nested-components.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-react-to-render-nested-components.english.md
index b935e639cb..ceee931366 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-react-to-render-nested-components.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-react-to-render-nested-components.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036165
 title: Use React to Render Nested Components
 challengeType: 6
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 forumTopicId: 301420
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-state-to-toggle-an-element.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-state-to-toggle-an-element.english.md
index b3d05c17c9..60499a9554 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-state-to-toggle-an-element.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-state-to-toggle-an-element.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036176
 title: Use State to Toggle an Element
 challengeType: 6
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 isRequired: false
 forumTopicId: 301421
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentdidmount.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentdidmount.english.md
index 844cf04a5e..6811e6f183 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentdidmount.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentdidmount.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403617d
 title: Use the Lifecycle Method componentDidMount
 challengeType: 6
+isHidden: false
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 forumTopicId: 301422
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentwillmount.english.md b/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentwillmount.english.md
index fd8746556b..f7c33da033 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentwillmount.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentwillmount.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403617c
 title: Use the Lifecycle Method componentWillMount
 challengeType: 6
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 forumTopicId: 301423
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/write-a-react-component-from-scratch.english.md b/curriculum/challenges/english/03-front-end-libraries/react/write-a-react-component-from-scratch.english.md
index abee1de099..e19464b739 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/write-a-react-component-from-scratch.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/write-a-react-component-from-scratch.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036168
 title: Write a React Component from Scratch
 challengeType: 6
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 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/react/write-a-simple-counter.english.md b/curriculum/challenges/english/03-front-end-libraries/react/write-a-simple-counter.english.md
index 4ea045bed9..17c9850d7d 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/write-a-simple-counter.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/write-a-simple-counter.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036177
 title: Write a Simple Counter
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301425
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/combine-multiple-reducers.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/combine-multiple-reducers.english.md
index 092c6bb390..0a32f7c570 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/combine-multiple-reducers.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/combine-multiple-reducers.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036154
 title: Combine Multiple Reducers
 challengeType: 6
+isHidden: false
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 forumTopicId: 301436
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/copy-an-object-with-object.assign.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/copy-an-object-with-object.assign.english.md
index 0dc72b0733..53a50fcf3e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/copy-an-object-with-object.assign.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/copy-an-object-with-object.assign.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403615b
 title: Copy an Object with Object.assign
 challengeType: 6
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 forumTopicId: 301437
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/create-a-redux-store.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/create-a-redux-store.english.md
index 5b1b8bc9bd..d747951322 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/create-a-redux-store.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/create-a-redux-store.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614b
 title: Create a Redux Store
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301439
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/define-a-redux-action.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/define-a-redux-action.english.md
index 2c48a1d11a..f899231796 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/define-a-redux-action.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/define-a-redux-action.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614d
 title: Define a Redux Action
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301440
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/define-an-action-creator.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/define-an-action-creator.english.md
index 9ac5390a95..877fec7356 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/define-an-action-creator.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/define-an-action-creator.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614e
 title: Define an Action Creator
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301441
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/dispatch-an-action-event.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/dispatch-an-action-event.english.md
index b79cf5d9f0..ad492227a0 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/dispatch-an-action-event.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/dispatch-an-action-event.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614f
 title: Dispatch an Action Event
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301442
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/get-state-from-the-redux-store.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/get-state-from-the-redux-store.english.md
index 6c5a0a4494..4611eb47a6 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/get-state-from-the-redux-store.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/get-state-from-the-redux-store.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403614c
 title: Get State from the Redux Store
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301443
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/handle-an-action-in-the-store.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/handle-an-action-in-the-store.english.md
index e52506c01d..53e5b63863 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/handle-an-action-in-the-store.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/handle-an-action-in-the-store.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036150
 title: Handle an Action in the Store
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301444
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/never-mutate-state.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/never-mutate-state.english.md
index 0985cb212d..18652481ef 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/never-mutate-state.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/never-mutate-state.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036158
 title: Never Mutate State
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301445
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/register-a-store-listener.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/register-a-store-listener.english.md
index 7ed3ce2d13..bba1eb60f7 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/register-a-store-listener.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/register-a-store-listener.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036153
 title: Register a Store Listener
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301446
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/remove-an-item-from-an-array.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/remove-an-item-from-an-array.english.md
index fe93479034..e8f95e6fce 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/remove-an-item-from-an-array.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/remove-an-item-from-an-array.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d403615a
 title: Remove an Item from an Array
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301447
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/send-action-data-to-the-store.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/send-action-data-to-the-store.english.md
index 238a12e5f9..68e5933f72 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/send-action-data-to-the-store.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/send-action-data-to-the-store.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036155
 title: Send Action Data to the Store
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301448
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/use-a-switch-statement-to-handle-multiple-actions.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/use-a-switch-statement-to-handle-multiple-actions.english.md
index 690df9e2f6..5d2892eb82 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/use-a-switch-statement-to-handle-multiple-actions.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/use-a-switch-statement-to-handle-multiple-actions.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036151
 title: Use a Switch Statement to Handle Multiple Actions
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301449
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/use-const-for-action-types.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/use-const-for-action-types.english.md
index c105bc0b70..b2e1bccd38 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/use-const-for-action-types.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/use-const-for-action-types.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036152
 title: Use const for Action Types
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301450
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/use-middleware-to-handle-asynchronous-actions.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/use-middleware-to-handle-asynchronous-actions.english.md
index ed5f26d1fc..0d7970e1de 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/use-middleware-to-handle-asynchronous-actions.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/use-middleware-to-handle-asynchronous-actions.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036156
 title: Use Middleware to Handle Asynchronous Actions
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301451
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/use-the-spread-operator-on-arrays.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/use-the-spread-operator-on-arrays.english.md
index 098f7887a6..2387a2df6f 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/use-the-spread-operator-on-arrays.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/use-the-spread-operator-on-arrays.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036159
 title: Use the Spread Operator on Arrays
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301452
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/redux/write-a-counter-with-redux.english.md b/curriculum/challenges/english/03-front-end-libraries/redux/write-a-counter-with-redux.english.md
index 77825c413b..f343e233fa 100644
--- a/curriculum/challenges/english/03-front-end-libraries/redux/write-a-counter-with-redux.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/redux/write-a-counter-with-redux.english.md
@@ -2,6 +2,7 @@
 id: 5a24c314108439a4d4036157
 title: Write a Counter with Redux
 challengeType: 6
+isHidden: false
 isRequired: false
 forumTopicId: 301453
 ---
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/apply-a-style-until-a-condition-is-met-with-while.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/apply-a-style-until-a-condition-is-met-with-while.english.md
index ed2971c9b2..dc546c4f1e 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/apply-a-style-until-a-condition-is-met-with-while.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/apply-a-style-until-a-condition-is-met-with-while.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbf367417b2b2512bbb
 title: Apply a Style Until a Condition is Met with @while
 challengeType: 0
+isHidden: false
 forumTopicId: 301454
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
index f6e1ca8e16..d9aa545908 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbd367417b2b2512bb6
 title: Create Reusable CSS with Mixins
 challengeType: 0
+isHidden: false
 forumTopicId: 301455
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/extend-one-set-of-css-styles-to-another-element.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/extend-one-set-of-css-styles-to-another-element.english.md
index 9df5d6d11b..0e965cfb95 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/extend-one-set-of-css-styles-to-another-element.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/extend-one-set-of-css-styles-to-another-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa5367417b2b2512bbd
 title: Extend One Set of CSS Styles to Another Element
 challengeType: 0
+isHidden: false
 forumTopicId: 301456
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/nest-css-with-sass.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/nest-css-with-sass.english.md
index 6b3187d654..2eb164fb6f 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/nest-css-with-sass.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/nest-css-with-sass.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbd367417b2b2512bb5
 title: Nest CSS with Sass
 challengeType: 0
+isHidden: false
 forumTopicId: 301457
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/split-your-styles-into-smaller-chunks-with-partials.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/split-your-styles-into-smaller-chunks-with-partials.english.md
index d9275bf0b1..96302152c4 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/split-your-styles-into-smaller-chunks-with-partials.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/split-your-styles-into-smaller-chunks-with-partials.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbf367417b2b2512bbc
 title: Split Your Styles into Smaller Chunks with Partials
 challengeType: 0
+isHidden: false
 forumTopicId: 301459
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/store-data-with-sass-variables.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/store-data-with-sass-variables.english.md
index 9d8a555c48..5093aa90d4 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/store-data-with-sass-variables.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/store-data-with-sass-variables.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbd367417b2b2512bb4
 title: Store Data with Sass Variables
 challengeType: 0
+isHidden: false
 forumTopicId: 301460
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/use-each-to-map-over-items-in-a-list.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/use-each-to-map-over-items-in-a-list.english.md
index e045fa4db3..975658510b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/use-each-to-map-over-items-in-a-list.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/use-each-to-map-over-items-in-a-list.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbf367417b2b2512bba
 title: Use @each to Map Over Items in a List
 challengeType: 0
+isHidden: false
 forumTopicId: 301461
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/use-for-to-create-a-sass-loop.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/use-for-to-create-a-sass-loop.english.md
index 3e459b7a35..b354254430 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/use-for-to-create-a-sass-loop.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/use-for-to-create-a-sass-loop.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbe367417b2b2512bb9
 title: Use @for to Create a Sass Loop
 challengeType: 0
+isHidden: false
 forumTopicId: 301462
 ---
 
diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles.english.md
index faefa34200..da3313bf38 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/use-if-and-else-to-add-logic-to-your-styles.english.md
@@ -2,6 +2,7 @@
 id: 587d7dbe367417b2b2512bb8
 title: Use @if and @else to Add Logic To Your Styles
 challengeType: 0
+isHidden: false
 forumTopicId: 301463
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart.english.md
index 080af42c78..f2b3eeb401 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart.english.md
@@ -3,6 +3,7 @@ id: bd7168d8c242eddfaeb5bd13
 title: Visualize Data with a Bar Chart
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301464
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.english.md
index e167a075ed..c0d12a0c5f 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.english.md
@@ -3,6 +3,7 @@ id: 587d7fa6367417b2b2512bbf
 title: Visualize Data with a Choropleth Map
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301465
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-heat-map.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-heat-map.english.md
index 26a96f0bc3..cb71854a61 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-heat-map.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-heat-map.english.md
@@ -3,6 +3,7 @@ id: bd7188d8c242eddfaeb5bd13
 title: Visualize Data with a Heat Map
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301466
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.english.md
index 509738489a..93f6c87ab0 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.english.md
@@ -3,6 +3,7 @@ id: bd7178d8c242eddfaeb5bd13
 title: Visualize Data with a Scatterplot Graph
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301467
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.english.md
index d14c6e0677..47f364e621 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.english.md
@@ -3,6 +3,7 @@ id: 587d7fa6367417b2b2512bc0
 title: Visualize Data with a Treemap Diagram
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301468
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
index 4290bd690d..1924867c9d 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301469
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
index efb0058b07..43094cf663 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301470
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
index 71d3fc8dc2..4a2592f6ea 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301471
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
index 9518ead02c..b5ab88fb3d 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
 challengeType: 6
+isHidden: false
 forumTopicId: 301472
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
index e3aa00cc33..41958bbe34 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301473
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
index 105dac465d..29a88f95aa 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301474
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
index f6a765501b..9d0cbea73b 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301475
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
index 325bad816f..b73bb84e8e 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301476
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
index 23c46728ad..c8f0f41f37 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
 challengeType: 6
+isHidden: false
 forumTopicId: 301477
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
index f7e13ef2e0..c86d1ef47e 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
 challengeType: 6
+isHidden: false
 forumTopicId: 301479
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
index 3fb3faee79..5c74e91fee 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301480
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
index 5ac09a4132..cf33563afd 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
 challengeType: 6
+isHidden: false
 forumTopicId: 301481
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
index 4a635c54d7..bd7f5e515b 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
 challengeType: 6
+isHidden: false
 forumTopicId: 301482
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
index e4129faa91..af8388a6d3 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301483
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
index ea5b1d18e6..bf742bfd81 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
 challengeType: 6
+isHidden: false
 forumTopicId: 301484
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
index 5023052756..dc779df174 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
 challengeType: 6
+isHidden: false
 forumTopicId: 301485
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
index ab23ba02cb..d245a22167 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
 challengeType: 6
+isHidden: false
 forumTopicId: 301486
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
index cd11194bae..75c045ccac 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
 challengeType: 6
+isHidden: false
 forumTopicId: 301487
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
index 0ac2792be0..0ee7117976 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301488
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
index 914c03aa92..3d44351bf1 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301489
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
index 7387ae743f..11bc19ceb8 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301490
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
index c86a2123c3..a3b7f65c9b 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
 challengeType: 6
+isHidden: false
 forumTopicId: 301491
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
index 42257895f5..20ceed8961 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
 challengeType: 6
+isHidden: false
 forumTopicId: 301492
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
index 1f31b73245..6896772874 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
 challengeType: 6
+isHidden: false
 forumTopicId: 301493
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
index 3b451ab4a3..4e1a41768b 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301494
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
index 26963b5039..3dc754724e 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
 challengeType: 6
+isHidden: false
 forumTopicId: 301495
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
index ee2d62c6b1..4cb1ea185d 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
 challengeType: 6
+isHidden: false
 forumTopicId: 301496
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
index e2e4cd0193..6861f55656 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301497
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
index 85b8cc4d17..de650f8be3 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301498
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/access-the-json-data-from-an-api.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/access-the-json-data-from-an-api.english.md
index 41c354be97..cd1d20ef45 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/access-the-json-data-from-an-api.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/access-the-json-data-from-an-api.english.md
@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be4
 title: Access the JSON Data from an API
 challengeType: 6
+isHidden: false
 forumTopicId: 301499
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/change-text-with-click-events.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/change-text-with-click-events.english.md
index 2fea07e968..6bf9c90751 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/change-text-with-click-events.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/change-text-with-click-events.english.md
@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512be2
 title: Change Text with click Events
 challengeType: 6
+isHidden: false
 forumTopicId: 301500
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/convert-json-data-to-html.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/convert-json-data-to-html.english.md
index a75a4fb508..155cffc6d0 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/convert-json-data-to-html.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/convert-json-data-to-html.english.md
@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be5
 title: Convert JSON Data to HTML
 challengeType: 6
+isHidden: false
 forumTopicId: 16807
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.english.md
index bba3fbf685..b801dcb968 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.english.md
@@ -2,6 +2,7 @@
 id: 587d7faf367417b2b2512be8
 title: Get Geolocation Data to Find A User's GPS Coordinates
 challengeType: 6
+isHidden: false
 forumTopicId: 18188
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-fetch-method.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-fetch-method.english.md
index bff5eb66d0..ce91131e10 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-fetch-method.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-fetch-method.english.md
@@ -2,6 +2,7 @@
 id: 5ccfad82bb2dc6c965a848e5
 title: Get JSON with the JavaScript fetch method
 challengeType: 6
+isHidden: false
 forumTopicId: 301501
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md
index e509b0662d..3a88f25bb1 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be3
 title: Get JSON with the JavaScript XMLHttpRequest Method
 challengeType: 6
+isHidden: false
 forumTopicId: 301502
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/handle-click-events-with-javascript-using-the-onclick-property.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/handle-click-events-with-javascript-using-the-onclick-property.english.md
index 3aa05de169..fa08d18f50 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/handle-click-events-with-javascript-using-the-onclick-property.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/handle-click-events-with-javascript-using-the-onclick-property.english.md
@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512be1
 title: Handle Click Events with JavaScript using the onclick property
 challengeType: 6
+isHidden: false
 forumTopicId: 301503
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.english.md
index bb7e7e645f..e62054686d 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.english.md
@@ -2,6 +2,7 @@
 id: 587d7faf367417b2b2512be9
 title: Post Data with the JavaScript XMLHttpRequest Method
 challengeType: 6
+isHidden: false
 forumTopicId: 301504
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/pre-filter-json-to-get-the-data-you-need.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/pre-filter-json-to-get-the-data-you-need.english.md
index abaf627608..1fd445e85e 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/pre-filter-json-to-get-the-data-you-need.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/pre-filter-json-to-get-the-data-you-need.english.md
@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be7
 title: Pre-filter JSON to Get the Data You Need
 challengeType: 6
+isHidden: false
 forumTopicId: 18257
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/render-images-from-data-sources.english.md b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/render-images-from-data-sources.english.md
index 85afea0179..0ec7527117 100644
--- a/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/render-images-from-data-sources.english.md
+++ b/curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/render-images-from-data-sources.english.md
@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be6
 title: Render Images from Data Sources
 challengeType: 6
+isHidden: false
 forumTopicId: 18265
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/exercise-tracker.english.md b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/exercise-tracker.english.md
index 2dbe8df6cc..f5e596ee44 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/exercise-tracker.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/exercise-tracker.english.md
@@ -2,6 +2,7 @@
 id: 5a8b073d06fa14fcfde687aa
 title: Exercise Tracker
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301505
 ---
diff --git a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/file-metadata-microservice.english.md b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/file-metadata-microservice.english.md
index 07cafbe13e..35b13bd439 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/file-metadata-microservice.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/file-metadata-microservice.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443edefaeb5bd0f
 title: File Metadata Microservice
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301506
 ---
diff --git a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/request-header-parser-microservice.english.md b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/request-header-parser-microservice.english.md
index 93f0b2931d..084e5ea77d 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/request-header-parser-microservice.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/request-header-parser-microservice.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443edefaeb5bdff
 title: Request Header Parser Microservice
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301507
 ---
diff --git a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/timestamp-microservice.english.md b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/timestamp-microservice.english.md
index a20bc3183e..c57f95302f 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/timestamp-microservice.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/timestamp-microservice.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443edefaeb5bdef
 title: Timestamp Microservice
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301508
 ---
diff --git a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/url-shortener-microservice.english.md b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/url-shortener-microservice.english.md
index 8345089c1a..230a228f4b 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/url-shortener-microservice.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/apis-and-microservices-projects/url-shortener-microservice.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443edefaeb5bd0e
 title: URL Shortener Microservice
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301509
 ---
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/chain-middleware-to-create-a-time-server.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/chain-middleware-to-create-a-time-server.english.md
index 0fc6a663e9..abeb148365 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/chain-middleware-to-create-a-time-server.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/chain-middleware-to-create-a-time-server.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb1367417b2b2512bf4
 title: Chain Middleware to Create a Time Server
 challengeType: 2
+isHidden: false
 forumTopicId: 301510
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-data-from-post-requests.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-data-from-post-requests.english.md
index 0ad59398b7..9604b77f66 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-data-from-post-requests.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-data-from-post-requests.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb2367417b2b2512bf8
 title: Get Data from POST Requests
 challengeType: 2
+isHidden: false
 forumTopicId: 301511
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-query-parameter-input-from-the-client.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-query-parameter-input-from-the-client.english.md
index 27913b7885..17edb5e423 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-query-parameter-input-from-the-client.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-query-parameter-input-from-the-client.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb2367417b2b2512bf6
 title: Get Query Parameter Input from the Client
 challengeType: 2
+isHidden: false
 forumTopicId: 301512
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-route-parameter-input-from-the-client.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-route-parameter-input-from-the-client.english.md
index 3cf3133bcf..39fd97a675 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-route-parameter-input-from-the-client.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/get-route-parameter-input-from-the-client.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb2367417b2b2512bf5
 title: Get Route Parameter Input from the Client
 challengeType: 2
+isHidden: false
 forumTopicId: 301513
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/implement-a-root-level-request-logger-middleware.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/implement-a-root-level-request-logger-middleware.english.md
index cb798dfe6b..f54eb9eb76 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/implement-a-root-level-request-logger-middleware.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/implement-a-root-level-request-logger-middleware.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb1367417b2b2512bf3
 title: Implement a Root-Level Request Logger Middleware
 challengeType: 2
+isHidden: false
 forumTopicId: 301514
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/meet-the-node-console.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/meet-the-node-console.english.md
index 42fba4bb77..f1206507a2 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/meet-the-node-console.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/meet-the-node-console.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb0367417b2b2512bed
 title: Meet the Node console
 challengeType: 2
+isHidden: false
 forumTopicId: 301515
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-an-html-file.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-an-html-file.english.md
index 772fa614ee..9307a63704 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-an-html-file.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-an-html-file.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb0367417b2b2512bef
 title: Serve an HTML File
 challengeType: 2
+isHidden: false
 forumTopicId: 301516
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-json-on-a-specific-route.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-json-on-a-specific-route.english.md
index 3c944e1566..9b01fc277a 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-json-on-a-specific-route.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-json-on-a-specific-route.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb1367417b2b2512bf1
 title: Serve JSON on a Specific Route
 challengeType: 2
+isHidden: false
 forumTopicId: 301517
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-static-assets.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-static-assets.english.md
index 4cc5ed8b5c..85934fd49a 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-static-assets.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/serve-static-assets.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb0367417b2b2512bf0
 title: Serve Static Assets
 challengeType: 2
+isHidden: false
 forumTopicId: 301518
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/start-a-working-express-server.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/start-a-working-express-server.english.md
index 42a47c2aa7..445a075f6c 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/start-a-working-express-server.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/start-a-working-express-server.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb0367417b2b2512bee
 title: Start a Working Express Server
 challengeType: 2
+isHidden: false
 forumTopicId: 301519
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-body-parser-to-parse-post-requests.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-body-parser-to-parse-post-requests.english.md
index df2b517ffc..7a5eca037a 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-body-parser-to-parse-post-requests.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-body-parser-to-parse-post-requests.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb2367417b2b2512bf7
 title: Use body-parser to Parse POST Requests
 challengeType: 2
+isHidden: false
 forumTopicId: 301520
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-the-.env-file.english.md b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-the-.env-file.english.md
index 81da87b0f8..b3095f4263 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-the-.env-file.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/basic-node-and-express/use-the-.env-file.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb1367417b2b2512bf2
 title: Use the .env File
 challengeType: 2
+isHidden: false
 forumTopicId: 301521
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-description-to-your-package.json.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-description-to-your-package.json.english.md
index b5c4b79616..a82f0e5d87 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-description-to-your-package.json.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-description-to-your-package.json.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb3367417b2b2512bfc
 title: Add a Description to Your package.json
 challengeType: 2
+isHidden: false
 forumTopicId: 301522
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-license-to-your-package.json.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-license-to-your-package.json.english.md
index 98ce167cd8..e50b539b9b 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-license-to-your-package.json.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-license-to-your-package.json.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb4367417b2b2512bfe
 title: Add a License to Your package.json
 challengeType: 2
+isHidden: false
 forumTopicId: 301523
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-version-to-your-package.json.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-version-to-your-package.json.english.md
index 150634e09d..16c9ce7cdf 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-version-to-your-package.json.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-a-version-to-your-package.json.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb4367417b2b2512bff
 title: Add a Version to Your package.json
 challengeType: 2
+isHidden: false
 forumTopicId: 301525
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-keywords-to-your-package.json.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-keywords-to-your-package.json.english.md
index 5d44613e20..3ae9d6a465 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-keywords-to-your-package.json.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/add-keywords-to-your-package.json.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb4367417b2b2512bfd
 title: Add Keywords to Your package.json
 challengeType: 2
+isHidden: false
 forumTopicId: 301526
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/expand-your-project-with-external-packages-from-npm.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/expand-your-project-with-external-packages-from-npm.english.md
index 432212ed49..141fb3ddf5 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/expand-your-project-with-external-packages-from-npm.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/expand-your-project-with-external-packages-from-npm.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb4367417b2b2512c00
 title: Expand Your Project with External Packages from npm
 challengeType: 2
+isHidden: false
 forumTopicId: 301527
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.english.md
index f104de5029..023cb27583 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb3367417b2b2512bfb
 title: 'How to Use package.json, the Core of Any Node.js Project or npm Package'
 challengeType: 2
+isHidden: false
 forumTopicId: 301528
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/manage-npm-dependencies-by-understanding-semantic-versioning.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/manage-npm-dependencies-by-understanding-semantic-versioning.english.md
index d0ee1d78cc..3e2c94dcaa 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/manage-npm-dependencies-by-understanding-semantic-versioning.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/manage-npm-dependencies-by-understanding-semantic-versioning.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb5367417b2b2512c01
 title: Manage npm Dependencies By Understanding Semantic Versioning
 challengeType: 2
+isHidden: false
 forumTopicId: 301529
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/remove-a-package-from-your-dependencies.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/remove-a-package-from-your-dependencies.english.md
index d7470ba230..7d831ddf5b 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/remove-a-package-from-your-dependencies.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/remove-a-package-from-your-dependencies.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb5367417b2b2512c04
 title: Remove a Package from Your Dependencies
 challengeType: 2
+isHidden: false
 forumTopicId: 301530
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-caret-character-to-use-the-latest-minor-version-of-a-dependency.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-caret-character-to-use-the-latest-minor-version-of-a-dependency.english.md
index 135fe3bca2..647f32a840 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-caret-character-to-use-the-latest-minor-version-of-a-dependency.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-caret-character-to-use-the-latest-minor-version-of-a-dependency.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb5367417b2b2512c03
 title: Use the Caret-Character to Use the Latest Minor Version of a Dependency
 challengeType: 2
+isHidden: false
 forumTopicId: 301531
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-tilde-character-to-always-use-the-latest-patch-version-of-a-dependency.english.md b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-tilde-character-to-always-use-the-latest-patch-version-of-a-dependency.english.md
index 774b7922d3..8aa88d66db 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-tilde-character-to-always-use-the-latest-patch-version-of-a-dependency.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/managing-packages-with-npm/use-the-tilde-character-to-always-use-the-latest-patch-version-of-a-dependency.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb5367417b2b2512c02
 title: Use the Tilde-Character to Always Use the Latest Patch Version of a Dependency
 challengeType: 2
+isHidden: false
 forumTopicId: 301532
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/chain-search-query-helpers-to-narrow-search-results.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/chain-search-query-helpers-to-narrow-search-results.english.md
index b2a82ddcef..0d2577b968 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/chain-search-query-helpers-to-narrow-search-results.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/chain-search-query-helpers-to-narrow-search-results.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb9367417b2b2512c12
 title: Chain Search Query Helpers to Narrow Search Results
 challengeType: 2
+isHidden: false
 forumTopicId: 301533
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-a-model.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-a-model.english.md
index 663fd41ace..5e5266e188 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-a-model.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-a-model.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb6367417b2b2512c07
 title: Create a Model
 challengeType: 2
+isHidden: false
 forumTopicId: 301535
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-and-save-a-record-of-a-model.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-and-save-a-record-of-a-model.english.md
index 05c6ad868d..e8619d8a83 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-and-save-a-record-of-a-model.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-and-save-a-record-of-a-model.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb6367417b2b2512c09
 title: Create and Save a Record of a Model
 challengeType: 2
+isHidden: false
 forumTopicId: 301536
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-many-records-with-model.create.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-many-records-with-model.create.english.md
index e7239dd84b..86463c4eb6 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-many-records-with-model.create.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/create-many-records-with-model.create.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb7367417b2b2512c0a
 title: Create Many Records with model.create()
 challengeType: 2
+isHidden: false
 forumTopicId: 301537
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.english.md
index 83d0c6f1a4..32b08f6132 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb8367417b2b2512c11
 title: Delete Many Documents with model.remove()
 challengeType: 2
+isHidden: false
 forumTopicId: 301538
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-one-document-using-model.findbyidandremove.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-one-document-using-model.findbyidandremove.english.md
index 721d16a80b..03b12f0c9a 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-one-document-using-model.findbyidandremove.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/delete-one-document-using-model.findbyidandremove.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb8367417b2b2512c10
 title: Delete One Document Using model.findByIdAndRemove
 challengeType: 2
+isHidden: false
 forumTopicId: 301539
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose.english.md
index 5a996cca25..db42189d3c 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb6367417b2b2512c06
 title: Install and Set Up Mongoose
 challengeType: 2
+isHidden: false
 forumTopicId: 301540
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-classic-updates-by-running-find-edit-then-save.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-classic-updates-by-running-find-edit-then-save.english.md
index 256be77225..70495193e9 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-classic-updates-by-running-find-edit-then-save.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-classic-updates-by-running-find-edit-then-save.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb8367417b2b2512c0e
 title: 'Perform Classic Updates by Running Find, Edit, then Save'
 challengeType: 2
+isHidden: false
 forumTopicId: 301541
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-new-updates-on-a-document-using-model.findoneandupdate.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-new-updates-on-a-document-using-model.findoneandupdate.english.md
index 8f434445da..4d57587ab0 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-new-updates-on-a-document-using-model.findoneandupdate.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/perform-new-updates-on-a-document-using-model.findoneandupdate.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb8367417b2b2512c0f
 title: Perform New Updates on a Document Using model.findOneAndUpdate()
 challengeType: 2
+isHidden: false
 forumTopicId: 301542
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.find-to-search-your-database.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.find-to-search-your-database.english.md
index 0f5fc7b99b..1c45928317 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.find-to-search-your-database.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.find-to-search-your-database.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb7367417b2b2512c0b
 title: Use model.find() to Search Your Database
 challengeType: 2
+isHidden: false
 forumTopicId: 301543
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findbyid-to-search-your-database-by-id.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findbyid-to-search-your-database-by-id.english.md
index c7007ed3cc..ce762998ea 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findbyid-to-search-your-database-by-id.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findbyid-to-search-your-database-by-id.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb7367417b2b2512c0d
 title: Use model.findById() to Search Your Database By _id
 challengeType: 2
+isHidden: false
 forumTopicId: 301544
 ---
 
diff --git a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findone-to-return-a-single-matching-document-from-your-database.english.md b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findone-to-return-a-single-matching-document-from-your-database.english.md
index cee57f2209..df3f521478 100644
--- a/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findone-to-return-a-single-matching-document-from-your-database.english.md
+++ b/curriculum/challenges/english/05-apis-and-microservices/mongodb-and-mongoose/use-model.findone-to-return-a-single-matching-document-from-your-database.english.md
@@ -2,6 +2,7 @@
 id: 587d7fb7367417b2b2512c0c
 title: Use model.findOne() to Return a Single Matching Document from Your Database
 challengeType: 2
+isHidden: false
 forumTopicId: 301545
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/announce-new-users.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/announce-new-users.english.md
index ab8addffd3..3c363b006e 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/announce-new-users.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/announce-new-users.english.md
@@ -2,6 +2,7 @@
 id: 589fc832f9fc0f352b528e78
 title: Announce New Users
 challengeType: 2
+isHidden: false
 forumTopicId: 301546
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-strategies.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-strategies.english.md
index 7fa97be3f7..35fee287ee 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-strategies.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-strategies.english.md
@@ -2,6 +2,7 @@
 id: 5895f70df9fc0f352b528e68
 title: Authentication Strategies
 challengeType: 2
+isHidden: false
 forumTopicId: 301547
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-with-socket.io.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-with-socket.io.english.md
index f3bdfe8ab8..37ca6bc85d 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-with-socket.io.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/authentication-with-socket.io.english.md
@@ -2,6 +2,7 @@
 id: 589fc831f9fc0f352b528e77
 title: Authentication with Socket.IO
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+isHidden: false
 forumTopicId: 301548
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/clean-up-your-project-with-modules.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/clean-up-your-project-with-modules.english.md
index c35d4b116b..3bd88ccba4 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/clean-up-your-project-with-modules.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/clean-up-your-project-with-modules.english.md
@@ -2,6 +2,7 @@
 id: 589690e6f9fc0f352b528e6e
 title: Clean Up Your Project with Modules
 challengeType: 2
+isHidden: false
 forumTopicId: 301549
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/communicate-by-emitting.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/communicate-by-emitting.english.md
index 85e01479fb..a82e7a1121 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/communicate-by-emitting.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/communicate-by-emitting.english.md
@@ -2,6 +2,7 @@
 id: 589fc831f9fc0f352b528e75
 title: Communicate by Emitting
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/create-new-middleware.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/create-new-middleware.english.md
index c98ae85ccd..3ebce733e3 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/create-new-middleware.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/create-new-middleware.english.md
@@ -2,6 +2,7 @@
 id: 5895f70df9fc0f352b528e6a
 title: Create New Middleware
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/handle-a-disconnect.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/handle-a-disconnect.english.md
index 914a2ad0b9..4d1d870115 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/handle-a-disconnect.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/handle-a-disconnect.english.md
@@ -2,6 +2,7 @@
 id: 589fc831f9fc0f352b528e76
 title: Handle a Disconnect
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+isHidden: false
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diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/hashing-your-passwords.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/hashing-your-passwords.english.md
index a6bcda5c27..16ec7ebda1 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/hashing-your-passwords.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/hashing-your-passwords.english.md
@@ -2,6 +2,7 @@
 id: 58a25c98f9fc0f352b528e7f
 title: Hashing Your Passwords
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+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.english.md
index 627f2caea8..d31628420e 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.english.md
@@ -2,6 +2,7 @@
 id: 5895f70ef9fc0f352b528e6b
 title: How to Put a Profile Together
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-use-passport-strategies.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-use-passport-strategies.english.md
index 4bc123e874..031ef2d62a 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-use-passport-strategies.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/how-to-use-passport-strategies.english.md
@@ -2,6 +2,7 @@
 id: 5895f70df9fc0f352b528e69
 title: How to Use Passport Strategies
 challengeType: 2
+isHidden: false
 forumTopicId: 301555
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implement-the-serialization-of-a-passport-user.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implement-the-serialization-of-a-passport-user.english.md
index f8b78f07cf..2f2b0d6188 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implement-the-serialization-of-a-passport-user.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implement-the-serialization-of-a-passport-user.english.md
@@ -2,6 +2,7 @@
 id: 5895f70cf9fc0f352b528e67
 title: Implement the Serialization of a Passport User
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-ii.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-ii.english.md
index 8f6d21893a..36bd0fc44e 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-ii.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-ii.english.md
@@ -2,6 +2,7 @@
 id: 589a69f5f9fc0f352b528e71
 title: Implementation of Social Authentication II
 challengeType: 2
+isHidden: false
 forumTopicId: 301557
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-iii.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-iii.english.md
index 34ec317854..c165159e24 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-iii.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication-iii.english.md
@@ -2,6 +2,7 @@
 id: 589a8eb3f9fc0f352b528e72
 title: Implementation of Social Authentication III
 challengeType: 2
+isHidden: false
 forumTopicId: 301558
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication.english.md
index 48222c3e66..796a85cd9d 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/implementation-of-social-authentication.english.md
@@ -2,6 +2,7 @@
 id: 589a69f5f9fc0f352b528e70
 title: Implementation of Social Authentication
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+isHidden: false
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diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/logging-a-user-out.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/logging-a-user-out.english.md
index bc144ac293..719cd497d0 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/logging-a-user-out.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/logging-a-user-out.english.md
@@ -2,6 +2,7 @@
 id: 58965611f9fc0f352b528e6c
 title: Logging a User Out
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/registration-of-new-users.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/registration-of-new-users.english.md
index 52a7c89bca..ce6784a8ef 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/registration-of-new-users.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/registration-of-new-users.english.md
@@ -2,6 +2,7 @@
 id: 58966a17f9fc0f352b528e6d
 title: Registration of New Users
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+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/send-and-display-chat-messages.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/send-and-display-chat-messages.english.md
index fb0999f46c..37db0b6f62 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/send-and-display-chat-messages.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/send-and-display-chat-messages.english.md
@@ -2,6 +2,7 @@
 id: 589fc832f9fc0f352b528e79
 title: Send and Display Chat Messages
 challengeType: 2
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.english.md
index 1089749978..088ec7eefb 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.english.md
@@ -2,6 +2,7 @@
 id: 5895f70cf9fc0f352b528e66
 title: Serialization of a User Object
 challengeType: 2
+isHidden: false
 forumTopicId: 301563
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-a-template-engine.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-a-template-engine.english.md
index 32285f6e5f..d178dbba5e 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-a-template-engine.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-a-template-engine.english.md
@@ -2,6 +2,7 @@
 id: 5895f700f9fc0f352b528e63
 title: Set up a Template Engine
 challengeType: 2
+isHidden: false
 forumTopicId: 301564
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-passport.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-passport.english.md
index c6c5e1195a..3fdf83b292 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-passport.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-passport.english.md
@@ -2,6 +2,7 @@
 id: 5895f70cf9fc0f352b528e65
 title: Set up Passport
 challengeType: 2
+isHidden: false
 forumTopicId: 301565
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-the-environment.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-the-environment.english.md
index 88f3e6f834..87cdff4dff 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-the-environment.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/set-up-the-environment.english.md
@@ -2,6 +2,7 @@
 id: 589fc830f9fc0f352b528e74
 title: Set up the Environment
 challengeType: 2
+isHidden: false
 forumTopicId: 301566
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.english.md
index d19334b351..ae8c66bb52 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.english.md
@@ -2,6 +2,7 @@
 id: 5895f70bf9fc0f352b528e64
 title: Use a Template Engine's Powers
 challengeType: 2
+isHidden: false
 forumTopicId: 301567
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/anonymous-message-board.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/anonymous-message-board.english.md
index ec15c6b351..a2cc24da18 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/anonymous-message-board.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/anonymous-message-board.english.md
@@ -2,6 +2,7 @@
 id: 587d824a367417b2b2512c45
 title: Anonymous Message Board
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301568
 ---
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/issue-tracker.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/issue-tracker.english.md
index 801522cb65..be9075769b 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/issue-tracker.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/issue-tracker.english.md
@@ -2,6 +2,7 @@
 id: 587d8249367417b2b2512c42
 title: Issue Tracker
 challengeType: 4
+isHidden: false
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diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/metric-imperial-converter.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/metric-imperial-converter.english.md
index 77b5ac8999..b8e0fe4c5f 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/metric-imperial-converter.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/metric-imperial-converter.english.md
@@ -2,6 +2,7 @@
 id: 587d8249367417b2b2512c41
 title: Metric-Imperial Converter
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+isHidden: false
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diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/personal-library.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/personal-library.english.md
index cd0ac948a6..ac2411a635 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/personal-library.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/personal-library.english.md
@@ -2,6 +2,7 @@
 id: 587d824a367417b2b2512c43
 title: Personal Library
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+isHidden: false
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 ---
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/stock-price-checker.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/stock-price-checker.english.md
index 40f44ded2c..f794bceed9 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/stock-price-checker.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-and-quality-assurance-projects/stock-price-checker.english.md
@@ -2,6 +2,7 @@
 id: 587d824a367417b2b2512c44
 title: Stock Price Checker
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 301572
 ---
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/ask-browsers-to-access-your-site-via-https-only-with-helmet.hsts.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/ask-browsers-to-access-your-site-via-https-only-with-helmet.hsts.english.md
index c4a08923cc..f249cc69be 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/ask-browsers-to-access-your-site-via-https-only-with-helmet.hsts.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/ask-browsers-to-access-your-site-via-https-only-with-helmet.hsts.english.md
@@ -2,6 +2,7 @@
 id: 587d8248367417b2b2512c3c
 title: Ask Browsers to Access Your Site via HTTPS Only with helmet.hsts()
 challengeType: 2
+isHidden: false
 forumTopicId: 301573
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/avoid-inferring-the-response-mime-type-with-helmet.nosniff.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/avoid-inferring-the-response-mime-type-with-helmet.nosniff.english.md
index fe71dd9a9f..5b991019b0 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/avoid-inferring-the-response-mime-type-with-helmet.nosniff.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/avoid-inferring-the-response-mime-type-with-helmet.nosniff.english.md
@@ -2,6 +2,7 @@
 id: 587d8248367417b2b2512c3a
 title: Avoid Inferring the Response MIME Type with helmet.noSniff()
 challengeType: 2
+isHidden: false
 forumTopicId: 301574
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/configure-helmet-using-the-parent-helmet-middleware.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/configure-helmet-using-the-parent-helmet-middleware.english.md
index 5c70b2df27..e6e2ac1a18 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/configure-helmet-using-the-parent-helmet-middleware.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/configure-helmet-using-the-parent-helmet-middleware.english.md
@@ -2,6 +2,7 @@
 id: 587d8249367417b2b2512c40
 title: Configure Helmet Using the ‘parent’ helmet() Middleware
 challengeType: 2
+isHidden: false
 forumTopicId: 301575
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-client-side-caching-with-helmet.nocache.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-client-side-caching-with-helmet.nocache.english.md
index 4d9a7b489f..4f8c2aa21c 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-client-side-caching-with-helmet.nocache.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-client-side-caching-with-helmet.nocache.english.md
@@ -2,6 +2,7 @@
 id: 587d8249367417b2b2512c3e
 title: Disable Client-Side Caching with helmet.noCache()
 challengeType: 2
+isHidden: false
 forumTopicId: 301576
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-dns-prefetching-with-helmet.dnsprefetchcontrol.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-dns-prefetching-with-helmet.dnsprefetchcontrol.english.md
index 76b2737aad..891a34da6a 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-dns-prefetching-with-helmet.dnsprefetchcontrol.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/disable-dns-prefetching-with-helmet.dnsprefetchcontrol.english.md
@@ -2,6 +2,7 @@
 id: 587d8248367417b2b2512c3d
 title: Disable DNS Prefetching with helmet.dnsPrefetchControl()
 challengeType: 2
+isHidden: false
 forumTopicId: 301577
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-asynchronously.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-asynchronously.english.md
index 2d9a52fef4..e52a11eff9 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-asynchronously.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-asynchronously.english.md
@@ -2,6 +2,7 @@
 id: 58a25bcff9fc0f352b528e7d
 title: Hash and Compare Passwords Asynchronously
 challengeType: 2
+isHidden: false
 forumTopicId: 301578
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-synchronously.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-synchronously.english.md
index 3703d9bb13..eb25ccbc48 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-synchronously.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hash-and-compare-passwords-synchronously.english.md
@@ -2,6 +2,7 @@
 id: 58a25bcff9fc0f352b528e7e
 title: Hash and Compare Passwords Synchronously
 challengeType: 2
+isHidden: false
 forumTopicId: 301579
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hide-potentially-dangerous-information-using-helmet.hidepoweredby.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hide-potentially-dangerous-information-using-helmet.hidepoweredby.english.md
index e39d501beb..3b005a8a04 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hide-potentially-dangerous-information-using-helmet.hidepoweredby.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/hide-potentially-dangerous-information-using-helmet.hidepoweredby.english.md
@@ -2,6 +2,7 @@
 id: 587d8247367417b2b2512c37
 title: Hide Potentially Dangerous Information Using helmet.hidePoweredBy()
 challengeType: 2
+isHidden: false
 forumTopicId: 301580
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/install-and-require-helmet.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/install-and-require-helmet.english.md
index b5776eb9b7..b4e055c796 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/install-and-require-helmet.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/install-and-require-helmet.english.md
@@ -2,6 +2,7 @@
 id: 587d8247367417b2b2512c36
 title: Install and Require Helmet
 challengeType: 2
+isHidden: false
 forumTopicId: 301581
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-clickjacking-with-helmet.frameguard.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-clickjacking-with-helmet.frameguard.english.md
index 1fb856bde5..87cb9d8934 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-clickjacking-with-helmet.frameguard.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-clickjacking-with-helmet.frameguard.english.md
@@ -2,6 +2,7 @@
 id: 587d8247367417b2b2512c38
 title: Mitigate the Risk of Clickjacking with helmet.frameguard()
 challengeType: 2
+isHidden: false
 forumTopicId: 301582
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.english.md
index 7f2fb6ba80..c7f4296ab0 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.english.md
@@ -2,6 +2,7 @@
 id: 587d8247367417b2b2512c39
 title: Mitigate the Risk of Cross Site Scripting (XSS) Attacks with helmet.xssFilter()
 challengeType: 2
+isHidden: false
 forumTopicId: 301583
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/prevent-ie-from-opening-untrusted-html-with-helmet.ienoopen.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/prevent-ie-from-opening-untrusted-html-with-helmet.ienoopen.english.md
index f59b07c1c3..0ca67ff345 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/prevent-ie-from-opening-untrusted-html-with-helmet.ienoopen.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/prevent-ie-from-opening-untrusted-html-with-helmet.ienoopen.english.md
@@ -2,6 +2,7 @@
 id: 587d8248367417b2b2512c3b
 title: Prevent IE from Opening Untrusted HTML with helmet.ieNoOpen()
 challengeType: 2
+isHidden: false
 forumTopicId: 301584
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/set-a-content-security-policy-with-helmet.contentsecuritypolicy.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/set-a-content-security-policy-with-helmet.contentsecuritypolicy.english.md
index 82ab351e63..33fcced98b 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/set-a-content-security-policy-with-helmet.contentsecuritypolicy.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/set-a-content-security-policy-with-helmet.contentsecuritypolicy.english.md
@@ -2,6 +2,7 @@
 id: 587d8249367417b2b2512c3f
 title: Set a Content Security Policy with helmet.contentSecurityPolicy()
 challengeType: 2
+isHidden: false
 forumTopicId: 301585
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/understand-bcrypt-hashes.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/understand-bcrypt-hashes.english.md
index 335d6d0136..a13bbc36ec 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/understand-bcrypt-hashes.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/information-security-with-helmetjs/understand-bcrypt-hashes.english.md
@@ -2,6 +2,7 @@
 id: 58a25bcef9fc0f352b528e7c
 title: Understand BCrypt Hashes
 challengeType: 2
+isHidden: false
 forumTopicId: 301586
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/assert-deep-equality-with-.deepequal-and-.notdeepequal.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/assert-deep-equality-with-.deepequal-and-.notdeepequal.english.md
index a5ab16dffa..078a8326bc 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/assert-deep-equality-with-.deepequal-and-.notdeepequal.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/assert-deep-equality-with-.deepequal-and-.notdeepequal.english.md
@@ -2,6 +2,7 @@
 id: 587d824c367417b2b2512c4c
 title: Assert Deep Equality with .deepEqual and .notDeepEqual
 challengeType: 2
+isHidden: false
 forumTopicId: 301587
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/compare-the-properties-of-two-elements.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/compare-the-properties-of-two-elements.english.md
index a453677445..d00e38305d 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/compare-the-properties-of-two-elements.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/compare-the-properties-of-two-elements.english.md
@@ -2,6 +2,7 @@
 id: 587d824c367417b2b2512c4d
 title: Compare the Properties of Two Elements
 challengeType: 2
+isHidden: false
 forumTopicId: 301588
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.english.md
index a5d0bd34f8..ff49fc73df 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.english.md
@@ -2,6 +2,7 @@
 id: 587d824a367417b2b2512c46
 title: Learn How JavaScript Assertions Work
 challengeType: 2
+isHidden: false
 forumTopicId: 301589
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iii---put-method.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iii---put-method.english.md
index ad0ba8f6f9..771951c73e 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iii---put-method.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iii---put-method.english.md
@@ -2,6 +2,7 @@
 id: 587d824f367417b2b2512c5a
 title: Run Functional Tests on an API Response using Chai-HTTP III - PUT method
 challengeType: 2
+isHidden: false
 forumTopicId: 301590
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iv---put-method.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iv---put-method.english.md
index c4f3da41cf..d7c5e54a43 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iv---put-method.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-an-api-response-using-chai-http-iv---put-method.english.md
@@ -2,6 +2,7 @@
 id: 587d824f367417b2b2512c5b
 title: Run Functional Tests on an API Response using Chai-HTTP IV - PUT method
 challengeType: 2
+isHidden: false
 forumTopicId: 301591
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http-ii.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http-ii.english.md
index 4bc2b083d5..74aa4a382f 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http-ii.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http-ii.english.md
@@ -2,6 +2,7 @@
 id: 587d824f367417b2b2512c59
 title: Run Functional Tests on API Endpoints using Chai-HTTP II
 challengeType: 2
+isHidden: false
 forumTopicId: 301592
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http.english.md
index ae16537db4..ef746363bd 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-on-api-endpoints-using-chai-http.english.md
@@ -2,6 +2,7 @@
 id: 587d824e367417b2b2512c58
 title: Run Functional Tests on API Endpoints using Chai-HTTP
 challengeType: 2
+isHidden: false
 forumTopicId: 301593
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser-ii.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser-ii.english.md
index d0f395a023..1acb7c5d79 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser-ii.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser-ii.english.md
@@ -2,6 +2,7 @@
 id: 587d8250367417b2b2512c5d
 title: Run Functional Tests using a Headless Browser II
 challengeType: 2
+isHidden: false
 forumTopicId: 301594
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser.english.md
index 5bccdc7ca5..ee56ee8c5d 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/run-functional-tests-using-a-headless-browser.english.md
@@ -2,6 +2,7 @@
 id: 587d824f367417b2b2512c5c
 title: Run Functional Tests using a Headless Browser
 challengeType: 2
+isHidden: false
 forumTopicId: 301595
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-for-truthiness.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-for-truthiness.english.md
index cc10c6ff56..c9009128ea 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-for-truthiness.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-for-truthiness.english.md
@@ -2,6 +2,7 @@
 id: 587d824b367417b2b2512c49
 title: Test for Truthiness
 challengeType: 2
+isHidden: false
 forumTopicId: 301596
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-string-contains-a-substring.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-string-contains-a-substring.english.md
index 1295573fa2..a9289364be 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-string-contains-a-substring.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-string-contains-a-substring.english.md
@@ -2,6 +2,7 @@
 id: 587d824d367417b2b2512c53
 title: Test if a String Contains a Substring
 challengeType: 2
+isHidden: false
 forumTopicId: 301597
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-falls-within-a-specific-range.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-falls-within-a-specific-range.english.md
index f32be492ab..ba86420523 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-falls-within-a-specific-range.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-falls-within-a-specific-range.english.md
@@ -2,6 +2,7 @@
 id: 587d824c367417b2b2512c4f
 title: Test if a Value Falls within a Specific Range
 challengeType: 2
+isHidden: false
 forumTopicId: 301598
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-a-string.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-a-string.english.md
index e210941263..4a1fcd5146 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-a-string.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-a-string.english.md
@@ -2,6 +2,7 @@
 id: 587d824d367417b2b2512c52
 title: Test if a Value is a String
 challengeType: 2
+isHidden: false
 forumTopicId: 301599
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-an-array.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-an-array.english.md
index 1fab22ea95..ea5e78afc1 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-an-array.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-an-array.english.md
@@ -2,6 +2,7 @@
 id: 587d824d367417b2b2512c50
 title: Test if a Value is an Array
 challengeType: 2
+isHidden: false
 forumTopicId: 301600
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-of-a-specific-data-structure-type.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-of-a-specific-data-structure-type.english.md
index 6a39c3c7ad..c495dd1435 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-of-a-specific-data-structure-type.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-value-is-of-a-specific-data-structure-type.english.md
@@ -2,6 +2,7 @@
 id: 587d824e367417b2b2512c56
 title: Test if a Value is of a Specific Data Structure Type
 challengeType: 2
+isHidden: false
 forumTopicId: 301601
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-variable-or-function-is-defined.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-variable-or-function-is-defined.english.md
index 789842e2b1..cc72eb8c54 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-variable-or-function-is-defined.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-variable-or-function-is-defined.english.md
@@ -2,6 +2,7 @@
 id: 587d824b367417b2b2512c47
 title: Test if a Variable or Function is Defined
 challengeType: 2
+isHidden: false
 forumTopicId: 301602
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-array-contains-an-item.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-array-contains-an-item.english.md
index 34b53e8bce..603b7a089a 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-array-contains-an-item.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-array-contains-an-item.english.md
@@ -2,6 +2,7 @@
 id: 587d824d367417b2b2512c51
 title: Test if an Array Contains an Item
 challengeType: 2
+isHidden: false
 forumTopicId: 301603
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-has-a-property.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-has-a-property.english.md
index 6e25624862..3bb6c61457 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-has-a-property.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-has-a-property.english.md
@@ -2,6 +2,7 @@
 id: 587d824e367417b2b2512c55
 title: Test if an Object has a Property
 challengeType: 2
+isHidden: false
 forumTopicId: 301604
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-is-an-instance-of-a-constructor.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-is-an-instance-of-a-constructor.english.md
index bc61eaab55..512eeda0ad 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-is-an-instance-of-a-constructor.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-is-an-instance-of-a-constructor.english.md
@@ -2,6 +2,7 @@
 id: 587d824e367417b2b2512c57
 title: Test if an Object is an Instance of a Constructor
 challengeType: 2
+isHidden: false
 forumTopicId: 301605
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-one-value-is-below-or-at-least-as-large-as-another.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-one-value-is-below-or-at-least-as-large-as-another.english.md
index e4b7859bd4..1174fa0382 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-one-value-is-below-or-at-least-as-large-as-another.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/test-if-one-value-is-below-or-at-least-as-large-as-another.english.md
@@ -2,6 +2,7 @@
 id: 587d824c367417b2b2512c4e
 title: Test if One Value is Below or At Least as Large as Another
 challengeType: 2
+isHidden: false
 forumTopicId: 301606
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-assert.isok-and-assert.isnotok.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-assert.isok-and-assert.isnotok.english.md
index 51a3592e0d..403ebc224b 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-assert.isok-and-assert.isnotok.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-assert.isok-and-assert.isnotok.english.md
@@ -2,6 +2,7 @@
 id: 587d824b367417b2b2512c48
 title: Use Assert.isOK and Assert.isNotOK
 challengeType: 2
+isHidden: false
 forumTopicId: 301607
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-regular-expressions-to-test-a-string.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-regular-expressions-to-test-a-string.english.md
index 05c7d24c76..37822656c0 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-regular-expressions-to-test-a-string.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-regular-expressions-to-test-a-string.english.md
@@ -2,6 +2,7 @@
 id: 587d824d367417b2b2512c54
 title: Use Regular Expressions to Test a String
 challengeType: 2
+isHidden: false
 forumTopicId: 301608
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-double-equals-to-assert-equality.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-double-equals-to-assert-equality.english.md
index c68a3995b5..752e6eae39 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-double-equals-to-assert-equality.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-double-equals-to-assert-equality.english.md
@@ -2,6 +2,7 @@
 id: 587d824b367417b2b2512c4a
 title: Use the Double Equals to Assert Equality
 challengeType: 2
+isHidden: false
 forumTopicId: 301609
 ---
 
diff --git a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-triple-equals-to-assert-strict-equality.english.md b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-triple-equals-to-assert-strict-equality.english.md
index fe1cce704d..820eb7434a 100644
--- a/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-triple-equals-to-assert-strict-equality.english.md
+++ b/curriculum/challenges/english/06-information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-the-triple-equals-to-assert-strict-equality.english.md
@@ -2,6 +2,7 @@
 id: 587d824b367417b2b2512c4b
 title: Use the Triple Equals to Assert Strict Equality
 challengeType: 2
+isHidden: false
 forumTopicId: 301610
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/find-the-symmetric-difference.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/find-the-symmetric-difference.english.md
index 136e764b6a..060a91f525 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/find-the-symmetric-difference.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/find-the-symmetric-difference.english.md
@@ -2,6 +2,7 @@
 id: a3f503de51cf954ede28891d
 title: Find the Symmetric Difference
 challengeType: 5
+isHidden: false
 forumTopicId: 301611
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-bubble-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-bubble-sort.english.md
index 36fc5101be..729bfd78a4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-bubble-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-bubble-sort.english.md
@@ -2,6 +2,7 @@
 id: 8d5123c8c441eddfaeb5bdef
 title: Implement Bubble Sort
 challengeType: 1
+isHidden: false
 forumTopicId: 301612
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-insertion-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-insertion-sort.english.md
index 6bfce6b530..3c30fbf0d8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-insertion-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-insertion-sort.english.md
@@ -2,6 +2,7 @@
 id: 587d8259367417b2b2512c86
 title: Implement Insertion Sort
 challengeType: 1
+isHidden: false
 forumTopicId: 301613
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-merge-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-merge-sort.english.md
index cd4c4fb4ee..a2ef0507f2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-merge-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-merge-sort.english.md
@@ -2,6 +2,7 @@
 id: 587d825c367417b2b2512c8f
 title: Implement Merge Sort
 challengeType: 1
+isHidden: false
 forumTopicId: 301614
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-quick-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-quick-sort.english.md
index babda81e11..5f535a2cea 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-quick-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-quick-sort.english.md
@@ -2,6 +2,7 @@
 id: 587d825a367417b2b2512c89
 title: Implement Quick Sort
 challengeType: 1
+isHidden: false
 forumTopicId: 301615
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-selection-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-selection-sort.english.md
index 67d552b70e..1804a32f1d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-selection-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/implement-selection-sort.english.md
@@ -2,6 +2,7 @@
 id: 587d8259367417b2b2512c85
 title: Implement Selection Sort
 challengeType: 1
+isHidden: false
 forumTopicId: 301616
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/inventory-update.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/inventory-update.english.md
index b8ca781f12..6a8dee5dc2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/inventory-update.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/inventory-update.english.md
@@ -2,6 +2,7 @@
 id: a56138aff60341a09ed6c480
 title: Inventory Update
 challengeType: 5
+isHidden: false
 forumTopicId: 16019
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/no-repeats-please.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/no-repeats-please.english.md
index 95db4df569..9a4bade9ae 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/no-repeats-please.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/no-repeats-please.english.md
@@ -2,6 +2,7 @@
 id: a7bf700cd123b9a54eef01d5
 title: No Repeats Please
 challengeType: 5
+isHidden: false
 forumTopicId: 16037
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/algorithms/pairwise.english.md b/curriculum/challenges/english/08-coding-interview-prep/algorithms/pairwise.english.md
index 6c8f1e65ac..a713631b0d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/algorithms/pairwise.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/algorithms/pairwise.english.md
@@ -2,6 +2,7 @@
 id: a3f503de51cfab748ff001aa
 title: Pairwise
 challengeType: 5
+isHidden: false
 forumTopicId: 301617
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.english.md
index cafec3f7de..bb245b7200 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
 id: 587d8257367417b2b2512c7b
 title: Add a New Element to a Binary Search Tree
 challengeType: 1
+isHidden: false
 forumTopicId: 301618
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-elements-at-a-specific-index-in-a-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-elements-at-a-specific-index-in-a-linked-list.english.md
index d172206a6d..cf514e86d5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-elements-at-a-specific-index-in-a-linked-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/add-elements-at-a-specific-index-in-a-linked-list.english.md
@@ -2,6 +2,7 @@
 id: 587d8252367417b2b2512c67
 title: Add Elements at a Specific Index in a Linked List
 challengeType: 1
+isHidden: false
 forumTopicId: 301619
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-list.english.md
index 4ce5d1cd39..1f6f2458ff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-list.english.md
@@ -2,6 +2,7 @@
 id: 587d8256367417b2b2512c77
 title: Adjacency List
 challengeType: 1
+isHidden: false
 forumTopicId: 301620
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-matrix.english.md
index b50f740edb..60e9365efb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/adjacency-matrix.english.md
@@ -2,6 +2,7 @@
 id: 587d8256367417b2b2512c78
 title: Adjacency Matrix
 challengeType: 1
+isHidden: false
 forumTopicId: 301621
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/breadth-first-search.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/breadth-first-search.english.md
index 14ac244f21..f10ef62100 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/breadth-first-search.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/breadth-first-search.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.english.md
index 246689953b..a8e7bd1bd2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-binary-search-tree.english.md
index 01c059a64f..cbb061ded2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/check-if-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-circular-queue.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-circular-queue.english.md
index 1aa5bf4f47..a63c921902 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-circular-queue.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-doubly-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-doubly-linked-list.english.md
index c3bc59a6a9..2992e37077 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-doubly-linked-list.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-hash-table.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-hash-table.english.md
index 90e8806806..714a6f9c7a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-hash-table.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-linked-list-class.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-linked-list-class.english.md
index 8d1e093e9c..b0d54e95d6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-linked-list-class.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-map-data-structure.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-map-data-structure.english.md
index 77cd82138f..029227f0ce 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-map-data-structure.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-priority-queue-class.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-priority-queue-class.english.md
index 62b29f2822..fedd4c3053 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-priority-queue-class.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-queue-class.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-queue-class.english.md
index b55b51315e..8802d31776 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-queue-class.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-set-class.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-set-class.english.md
index a6f9627c56..e261522aff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-set-class.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-stack-class.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-stack-class.english.md
index 119e6e52f4..a970c4de85 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-stack-class.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-trie-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-trie-search-tree.english.md
index fad397c0f3..c6c9485e1b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-a-trie-search-tree.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-an-es6-javascript-map.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-an-es6-javascript-map.english.md
index 675d4fb198..321e96ea93 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-an-es6-javascript-map.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
index 0682d977c6..4e54e3eb82 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-leaf-node-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-leaf-node-in-a-binary-search-tree.english.md
index e54507d00d..f82a07a6ce 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-leaf-node-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-leaf-node-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-one-child-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-one-child-in-a-binary-search-tree.english.md
index 1d20c1e688..db7176d96e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-one-child-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-one-child-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-two-children-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-two-children-in-a-binary-search-tree.english.md
index a7e48c8dc4..ed1ae7f349 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-two-children-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/delete-a-node-with-two-children-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/depth-first-search.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/depth-first-search.english.md
index 4667a41a2a..3c3b401ac1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/depth-first-search.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.english.md
index 41021e359c..c6c3a65280 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.english.md
index 2141c693e7..9f4136d4c2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
 id: 587d8256367417b2b2512c7a
 title: Find the Minimum and Maximum Value in a Binary Search Tree
 challengeType: 1
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.english.md
index 14c6b78a93..cad247f43a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/incidence-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/incidence-matrix.english.md
index fef72bb94e..8a32ef559a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/incidence-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/incidence-matrix.english.md
@@ -2,6 +2,7 @@
 id: 587d8256367417b2b2512c79
 title: Incidence Matrix
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.english.md
index a1f0afdcc8..9db77d22a2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.english.md
@@ -2,6 +2,7 @@
 id: 587d825a367417b2b2512c8a
 title: Insert an Element into a Max Heap
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/invert-a-binary-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/invert-a-binary-tree.english.md
index 318f55e2ea..1e76490f0d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/invert-a-binary-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/invert-a-binary-tree.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/learn-how-a-stack-works.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/learn-how-a-stack-works.english.md
index 4504786b05..eb784ee00e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/learn-how-a-stack-works.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/learn-how-a-stack-works.english.md
@@ -2,6 +2,7 @@
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 title: Learn how a Stack Works
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.english.md
index 4f22b89699..70f8083d22 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.english.md
@@ -2,6 +2,7 @@
 id: 587d8254367417b2b2512c6e
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.english.md
index 98e55cf99d..c26880c003 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-union-on-two-sets.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-union-on-two-sets.english.md
index f5c7f3e0c3..dd83474947 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-union-on-two-sets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-a-union-on-two-sets.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.english.md
index 1e41fc3245..2ee4438649 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-an-element-from-a-max-heap.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-an-element-from-a-max-heap.english.md
index 5622b55469..0faa458dee 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-an-element-from-a-max-heap.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-an-element-from-a-max-heap.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list-by-index.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list-by-index.english.md
index c5a79585f6..0ac4136998 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list-by-index.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list-by-index.english.md
@@ -2,6 +2,7 @@
 id: 587d8251367417b2b2512c65
 title: Remove Elements from a Linked List by Index
 challengeType: 1
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.english.md
index 8d17bb4689..afa62cd4c1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.english.md
@@ -2,6 +2,7 @@
 id: 587d8251367417b2b2512c63
 title: Remove Elements from a Linked List
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-items-from-a-set-in-es6.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-items-from-a-set-in-es6.english.md
index 884aaa2f3c..914c824f13 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-items-from-a-set-in-es6.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/remove-items-from-a-set-in-es6.english.md
@@ -2,6 +2,7 @@
 id: 587d8254367417b2b2512c71
 title: Remove items from a set in ES6
 challengeType: 1
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.english.md
index 30cd037a37..94db84c92e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.english.md
@@ -2,6 +2,7 @@
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 title: Reverse a Doubly Linked List
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/search-within-a-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/search-within-a-linked-list.english.md
index 05bd9f1fc8..1f559a6c06 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/search-within-a-linked-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/search-within-a-linked-list.english.md
@@ -2,6 +2,7 @@
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 title: Search within a Linked List
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/typed-arrays.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/typed-arrays.english.md
index e81e55b8c6..2f52530bc8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/typed-arrays.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/typed-arrays.english.md
@@ -2,6 +2,7 @@
 id: 587d8253367417b2b2512c6a
 title: Typed Arrays
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-.has-and-.size-on-an-es6-set.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-.has-and-.size-on-an-es6-set.english.md
index 335359438a..d25925245d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-.has-and-.size-on-an-es6-set.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-.has-and-.size-on-an-es6-set.english.md
@@ -2,6 +2,7 @@
 id: 587d8255367417b2b2512c72
 title: Use .has and .size on an ES6 Set
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.english.md
index 2ec80e96e9..225d9ae927 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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 title: Use Breadth First Search in a Binary Search Tree
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.english.md
index 914799aab3..03f021da53 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.english.md
@@ -2,6 +2,7 @@
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 title: Use Depth First Search in a Binary Search Tree
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-spread-and-notes-for-es5-set-integration.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-spread-and-notes-for-es5-set-integration.english.md
index 31863a2c87..9eb3395472 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-spread-and-notes-for-es5-set-integration.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/use-spread-and-notes-for-es5-set-integration.english.md
@@ -2,6 +2,7 @@
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 title: Use Spread and Notes for ES5 Set() Integration
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/work-with-nodes-in-a-linked-list.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/work-with-nodes-in-a-linked-list.english.md
index e5cd9cd37e..fe982a4134 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/work-with-nodes-in-a-linked-list.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/work-with-nodes-in-a-linked-list.english.md
@@ -2,6 +2,7 @@
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 title: Work with Nodes in a Linked List
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-1-multiples-of-3-and-5.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-1-multiples-of-3-and-5.english.md
index 3daca99855..1da580ec2e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-1-multiples-of-3-and-5.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-1-multiples-of-3-and-5.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f36e1000cf542c50fe80
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-10-summation-of-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-10-summation-of-primes.english.md
index 69f8c25ddf..87ba383cb3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-10-summation-of-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-10-summation-of-primes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3761000cf542c50fe89
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+isHidden: false
 title: 'Problem 10: Summation of primes'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-100-arranged-probability.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-100-arranged-probability.english.md
index 5a31d92450..0a10abf577 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-100-arranged-probability.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-100-arranged-probability.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d01000cf542c50fee3
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+isHidden: false
 title: 'Problem 100: Arranged probability'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-101-optimum-polynomial.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-101-optimum-polynomial.english.md
index a7b0929f48..e57736e90d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-101-optimum-polynomial.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-101-optimum-polynomial.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d21000cf542c50fee4
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+isHidden: false
 title: 'Problem 101: Optimum polynomial'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-102-triangle-containment.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-102-triangle-containment.english.md
index 43ee98327c..f58dd04255 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-102-triangle-containment.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-102-triangle-containment.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d21000cf542c50fee5
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+isHidden: false
 title: 'Problem 102: Triangle containment'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-103-special-subset-sums-optimum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-103-special-subset-sums-optimum.english.md
index 665fbd0748..dfc6a28d8d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-103-special-subset-sums-optimum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-103-special-subset-sums-optimum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d61000cf542c50fee7
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+isHidden: false
 title: 'Problem 103: Special subset sums: optimum'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-104-pandigital-fibonacci-ends.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-104-pandigital-fibonacci-ends.english.md
index e51f25468f..7bf5656fff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-104-pandigital-fibonacci-ends.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-104-pandigital-fibonacci-ends.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d51000cf542c50fee6
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+isHidden: false
 title: 'Problem 104: Pandigital Fibonacci ends'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-105-special-subset-sums-testing.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-105-special-subset-sums-testing.english.md
index c9f0b8fdc2..e0480ff708 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-105-special-subset-sums-testing.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-105-special-subset-sums-testing.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d61000cf542c50fee8
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+isHidden: false
 title: 'Problem 105: Special subset sums: testing'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-106-special-subset-sums-meta-testing.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-106-special-subset-sums-meta-testing.english.md
index 740b70636f..e3efbacf2f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-106-special-subset-sums-meta-testing.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-106-special-subset-sums-meta-testing.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d71000cf542c50fee9
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+isHidden: false
 title: 'Problem 106: Special subset sums: meta-testing'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-107-minimal-network.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-107-minimal-network.english.md
index 45ec0cca4d..4b4726a0dc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-107-minimal-network.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-107-minimal-network.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d91000cf542c50feea
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+isHidden: false
 title: 'Problem 107: Minimal network'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-108-diophantine-reciprocals-i.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-108-diophantine-reciprocals-i.english.md
index 6cb97df5e2..beea5f5a1f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-108-diophantine-reciprocals-i.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-108-diophantine-reciprocals-i.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3d91000cf542c50feeb
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 title: 'Problem 108: Diophantine Reciprocals I'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-109-darts.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-109-darts.english.md
index a6552c6e38..fd597d3eba 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-109-darts.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-109-darts.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3db1000cf542c50feec
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+isHidden: false
 title: 'Problem 109: Darts'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-11-largest-product-in-a-grid.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-11-largest-product-in-a-grid.english.md
index 4af45aa659..497c9a2624 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-11-largest-product-in-a-grid.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-11-largest-product-in-a-grid.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3781000cf542c50fe8a
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+isHidden: false
 title: 'Problem 11: Largest product in a grid'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-110-diophantine-reciprocals-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-110-diophantine-reciprocals-ii.english.md
index 362dc704d6..ed3a1be0ca 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-110-diophantine-reciprocals-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-110-diophantine-reciprocals-ii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3db1000cf542c50feed
 challengeType: 5
+isHidden: false
 title: 'Problem 110: Diophantine Reciprocals II'
 forumTopicId: 301735
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-111-primes-with-runs.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-111-primes-with-runs.english.md
index 20843b8c96..592c0fbc25 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-111-primes-with-runs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-111-primes-with-runs.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3db1000cf542c50feee
 challengeType: 5
+isHidden: false
 title: 'Problem 111: Primes with runs'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-112-bouncy-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-112-bouncy-numbers.english.md
index 3cd0dbe822..933717028e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-112-bouncy-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-112-bouncy-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3dd1000cf542c50feef
 challengeType: 5
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 title: 'Problem 112: Bouncy numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-113-non-bouncy-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-113-non-bouncy-numbers.english.md
index 3a9722f7ed..97b146f9dd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-113-non-bouncy-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-113-non-bouncy-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3dd1000cf542c50fef0
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 title: 'Problem 113: Non-bouncy numbers'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-114-counting-block-combinations-i.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-114-counting-block-combinations-i.english.md
index 3afbe46014..63a97d4b69 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-114-counting-block-combinations-i.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-114-counting-block-combinations-i.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e01000cf542c50fef2
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 title: 'Problem 114: Counting block combinations I'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-115-counting-block-combinations-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-115-counting-block-combinations-ii.english.md
index 5c7232ca52..ce62bc85f2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-115-counting-block-combinations-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-115-counting-block-combinations-ii.english.md
@@ -1,6 +1,7 @@
 ---
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 title: 'Problem 115: Counting block combinations II'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-116-red-green-or-blue-tiles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-116-red-green-or-blue-tiles.english.md
index 4122530fd6..2a63126c1d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-116-red-green-or-blue-tiles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-116-red-green-or-blue-tiles.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-117-red-green-and-blue-tiles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-117-red-green-and-blue-tiles.english.md
index 594b6c7e88..7fa27cfeda 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-117-red-green-and-blue-tiles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-117-red-green-and-blue-tiles.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-118-pandigital-prime-sets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-118-pandigital-prime-sets.english.md
index b0b4433c7b..a1e494aec1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-118-pandigital-prime-sets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-118-pandigital-prime-sets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e21000cf542c50fef5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-119-digit-power-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-119-digit-power-sum.english.md
index 0ff3acd021..f9e7638378 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-119-digit-power-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-119-digit-power-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e41000cf542c50fef6
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-12-highly-divisible-triangular-number.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-12-highly-divisible-triangular-number.english.md
index 95b33c789a..495399b516 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-12-highly-divisible-triangular-number.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-12-highly-divisible-triangular-number.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3781000cf542c50fe8b
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-120-square-remainders.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-120-square-remainders.english.md
index 1d7208b03a..223a470135 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-120-square-remainders.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-120-square-remainders.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-121-disc-game-prize-fund.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-121-disc-game-prize-fund.english.md
index 33cd2c0e4d..91d4cdaf57 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-121-disc-game-prize-fund.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-121-disc-game-prize-fund.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e51000cf542c50fef8
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-122-efficient-exponentiation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-122-efficient-exponentiation.english.md
index e24b933b76..e61ed98298 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-122-efficient-exponentiation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-122-efficient-exponentiation.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e61000cf542c50fef9
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+isHidden: false
 title: 'Problem 122: Efficient exponentiation'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-123-prime-square-remainders.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-123-prime-square-remainders.english.md
index 14aff5415c..222137a126 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-123-prime-square-remainders.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-123-prime-square-remainders.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e71000cf542c50fefa
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+isHidden: false
 title: 'Problem 123: Prime square remainders'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-124-ordered-radicals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-124-ordered-radicals.english.md
index 360f597aa7..2583fc4714 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-124-ordered-radicals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-124-ordered-radicals.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e81000cf542c50fefb
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-125-palindromic-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-125-palindromic-sums.english.md
index ebe62d5725..104ba449c0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-125-palindromic-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-125-palindromic-sums.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3e91000cf542c50fefc
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+isHidden: false
 title: 'Problem 125: Palindromic sums'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-126-cuboid-layers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-126-cuboid-layers.english.md
index 3c16b1eabd..c520107a09 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-126-cuboid-layers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-126-cuboid-layers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ea1000cf542c50fefd
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-127-abc-hits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-127-abc-hits.english.md
index 55a100c39e..4001c0b55e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-127-abc-hits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-127-abc-hits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ec1000cf542c50fefe
 challengeType: 5
+isHidden: false
 title: 'Problem 127: abc-hits'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-128-hexagonal-tile-differences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-128-hexagonal-tile-differences.english.md
index 546ee3cd9b..2fc369b8c8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-128-hexagonal-tile-differences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-128-hexagonal-tile-differences.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ec1000cf542c50feff
 challengeType: 5
+isHidden: false
 title: 'Problem 128: Hexagonal tile differences'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-129-repunit-divisibility.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-129-repunit-divisibility.english.md
index f51514a0de..83d5ec43c7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-129-repunit-divisibility.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-129-repunit-divisibility.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ef1000cf542c50ff01
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+isHidden: false
 title: 'Problem 129: Repunit divisibility'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-13-large-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-13-large-sum.english.md
index a72f23b3e3..9c00cd1a11 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-13-large-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-13-large-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37a1000cf542c50fe8c
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+isHidden: false
 title: 'Problem 13: Large sum'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-130-composites-with-prime-repunit-property.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-130-composites-with-prime-repunit-property.english.md
index 09bb8615f9..31c78f9ace 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-130-composites-with-prime-repunit-property.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-130-composites-with-prime-repunit-property.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ee1000cf542c50ff00
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+isHidden: false
 title: 'Problem 130: Composites with prime repunit property'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-131-prime-cube-partnership.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-131-prime-cube-partnership.english.md
index 864c19136b..e5a630d88e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-131-prime-cube-partnership.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-131-prime-cube-partnership.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ef1000cf542c50ff02
 challengeType: 5
+isHidden: false
 title: 'Problem 131: Prime cube partnership'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-132-large-repunit-factors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-132-large-repunit-factors.english.md
index d17bde17cd..9b960461c0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-132-large-repunit-factors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-132-large-repunit-factors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f11000cf542c50ff03
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+isHidden: false
 title: 'Problem 132: Large repunit factors'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-133-repunit-nonfactors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-133-repunit-nonfactors.english.md
index 2e32064dec..31fa127afa 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-133-repunit-nonfactors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-133-repunit-nonfactors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f21000cf542c50ff04
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+isHidden: false
 title: 'Problem 133: Repunit nonfactors'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-134-prime-pair-connection.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-134-prime-pair-connection.english.md
index 62723180ea..7fd89d1d1d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-134-prime-pair-connection.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-134-prime-pair-connection.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f21000cf542c50ff05
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+isHidden: false
 title: 'Problem 134: Prime pair connection'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-135-same-differences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-135-same-differences.english.md
index 736ab241b4..d577034c9e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-135-same-differences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-135-same-differences.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f31000cf542c50ff06
 challengeType: 5
+isHidden: false
 title: 'Problem 135: Same differences'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-136-singleton-difference.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-136-singleton-difference.english.md
index 84ae83d0a7..9b2012d05f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-136-singleton-difference.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-136-singleton-difference.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f51000cf542c50ff07
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+isHidden: false
 title: 'Problem 136: Singleton difference'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-137-fibonacci-golden-nuggets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-137-fibonacci-golden-nuggets.english.md
index efe86d29ae..6acf068a59 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-137-fibonacci-golden-nuggets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-137-fibonacci-golden-nuggets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f51000cf542c50ff08
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+isHidden: false
 title: 'Problem 137: Fibonacci golden nuggets'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-138-special-isosceles-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-138-special-isosceles-triangles.english.md
index da2d02ed40..1f75388461 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-138-special-isosceles-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-138-special-isosceles-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f61000cf542c50ff09
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+isHidden: false
 title: 'Problem 138: Special isosceles triangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-139-pythagorean-tiles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-139-pythagorean-tiles.english.md
index 37d83007e9..11eaf24181 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-139-pythagorean-tiles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-139-pythagorean-tiles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f71000cf542c50ff0a
 challengeType: 5
+isHidden: false
 title: 'Problem 139: Pythagorean tiles'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-14-longest-collatz-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-14-longest-collatz-sequence.english.md
index 22c14a2423..70cc6d0b16 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-14-longest-collatz-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-14-longest-collatz-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37a1000cf542c50fe8d
 challengeType: 5
+isHidden: false
 title: 'Problem 14: Longest Collatz sequence'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-140-modified-fibonacci-golden-nuggets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-140-modified-fibonacci-golden-nuggets.english.md
index 1dbd8b18ca..d8fd0bb349 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-140-modified-fibonacci-golden-nuggets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-140-modified-fibonacci-golden-nuggets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fa1000cf542c50ff0c
 challengeType: 5
+isHidden: false
 title: 'Problem 140: Modified Fibonacci golden nuggets'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-141-investigating-progressive-numbers-n-which-are-also-square.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-141-investigating-progressive-numbers-n-which-are-also-square.english.md
index 7336331700..f970ce7b32 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-141-investigating-progressive-numbers-n-which-are-also-square.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-141-investigating-progressive-numbers-n-which-are-also-square.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3f91000cf542c50ff0b
 challengeType: 5
+isHidden: false
 title: 'Problem 141: Investigating progressive numbers, n, which are also square'
 forumTopicId: 301770
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-142-perfect-square-collection.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-142-perfect-square-collection.english.md
index ead7cbd021..c6c1574d98 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-142-perfect-square-collection.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-142-perfect-square-collection.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fa1000cf542c50ff0d
 challengeType: 5
+isHidden: false
 title: 'Problem 142: Perfect Square Collection'
 forumTopicId: 301771
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-143-investigating-the-torricelli-point-of-a-triangle.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-143-investigating-the-torricelli-point-of-a-triangle.english.md
index abdddd6520..c33e19cb70 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-143-investigating-the-torricelli-point-of-a-triangle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-143-investigating-the-torricelli-point-of-a-triangle.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fc1000cf542c50ff0e
 challengeType: 5
+isHidden: false
 title: 'Problem 143: Investigating the Torricelli point of a triangle'
 forumTopicId: 301772
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-144-investigating-multiple-reflections-of-a-laser-beam.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-144-investigating-multiple-reflections-of-a-laser-beam.english.md
index 85d76f3eca..5eb0b42bc5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-144-investigating-multiple-reflections-of-a-laser-beam.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-144-investigating-multiple-reflections-of-a-laser-beam.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fc1000cf542c50ff0f
 challengeType: 5
+isHidden: false
 title: 'Problem 144: Investigating multiple reflections of a laser beam'
 forumTopicId: 301773
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-145-how-many-reversible-numbers-are-there-below-one-billion.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-145-how-many-reversible-numbers-are-there-below-one-billion.english.md
index 0ecf2f9063..5a025e592c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-145-how-many-reversible-numbers-are-there-below-one-billion.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-145-how-many-reversible-numbers-are-there-below-one-billion.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fd1000cf542c50ff10
 challengeType: 5
+isHidden: false
 title: 'Problem 145: How many reversible numbers are there below one-billion?'
 forumTopicId: 301774
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-146-investigating-a-prime-pattern.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-146-investigating-a-prime-pattern.english.md
index d62baf5f9d..cde81a64c4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-146-investigating-a-prime-pattern.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-146-investigating-a-prime-pattern.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3fe1000cf542c50ff11
 challengeType: 5
+isHidden: false
 title: 'Problem 146: Investigating a Prime Pattern'
 forumTopicId: 301775
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-147-rectangles-in-cross-hatched-grids.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-147-rectangles-in-cross-hatched-grids.english.md
index fc8f15ea3a..2bbc6eab0f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-147-rectangles-in-cross-hatched-grids.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-147-rectangles-in-cross-hatched-grids.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ff1000cf542c50ff12
 challengeType: 5
+isHidden: false
 title: 'Problem 147: Rectangles in cross-hatched grids'
 forumTopicId: 301776
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-148-exploring-pascals-triangle.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-148-exploring-pascals-triangle.english.md
index a1847bf6d4..9d237d47a4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-148-exploring-pascals-triangle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-148-exploring-pascals-triangle.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4021000cf542c50ff14
 challengeType: 5
+isHidden: false
 title: 'Problem 148: Exploring Pascal''s triangle'
 forumTopicId: 301777
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-149-searching-for-a-maximum-sum-subsequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-149-searching-for-a-maximum-sum-subsequence.english.md
index 1edaab0482..aa787460ee 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-149-searching-for-a-maximum-sum-subsequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-149-searching-for-a-maximum-sum-subsequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4021000cf542c50ff13
 challengeType: 5
+isHidden: false
 title: 'Problem 149: Searching for a maximum-sum subsequence'
 forumTopicId: 301778
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-15-lattice-paths.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-15-lattice-paths.english.md
index c65d88df61..95fc61baaa 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-15-lattice-paths.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-15-lattice-paths.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37b1000cf542c50fe8e
 challengeType: 5
+isHidden: false
 title: 'Problem 15: Lattice paths'
 forumTopicId: 301780
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.english.md
index 8be6734626..407b270ae3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4031000cf542c50ff15
 challengeType: 5
+isHidden: false
 title: 'Problem 150: Searching a triangular array for a sub-triangle having minimum-sum'
 forumTopicId: 301781
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.english.md
index f1dbafaaca..0f8cddc52b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4031000cf542c50ff16
 challengeType: 5
+isHidden: false
 title: 'Problem 151: Paper sheets of standard sizes: an expected-value problem'
 forumTopicId: 301782
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-152-writing-one-half-as-a-sum-of-inverse-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-152-writing-one-half-as-a-sum-of-inverse-squares.english.md
index c68b3d23f8..552c0b141d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-152-writing-one-half-as-a-sum-of-inverse-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-152-writing-one-half-as-a-sum-of-inverse-squares.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4041000cf542c50ff17
 challengeType: 5
+isHidden: false
 title: 'Problem 152: Writing one half as a sum of inverse squares'
 forumTopicId: 301783
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-153-investigating-gaussian-integers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-153-investigating-gaussian-integers.english.md
index 1280060f1c..3e5e039a36 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-153-investigating-gaussian-integers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-153-investigating-gaussian-integers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4051000cf542c50ff18
 challengeType: 5
+isHidden: false
 title: 'Problem 153: Investigating Gaussian Integers'
 forumTopicId: 301784
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-154-exploring-pascals-pyramid.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-154-exploring-pascals-pyramid.english.md
index 74f3da9da6..26c1614cda 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-154-exploring-pascals-pyramid.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-154-exploring-pascals-pyramid.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4071000cf542c50ff19
 challengeType: 5
+isHidden: false
 title: 'Problem 154: Exploring Pascal''s pyramid'
 forumTopicId: 301785
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-155-counting-capacitor-circuits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-155-counting-capacitor-circuits.english.md
index 8693b253b7..04e8a8bc08 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-155-counting-capacitor-circuits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-155-counting-capacitor-circuits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4081000cf542c50ff1a
 challengeType: 5
+isHidden: false
 title: 'Problem 155: Counting Capacitor Circuits'
 forumTopicId: 301786
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-156-counting-digits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-156-counting-digits.english.md
index dca0927854..97de045e81 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-156-counting-digits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-156-counting-digits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4091000cf542c50ff1b
 challengeType: 5
+isHidden: false
 title: 'Problem 156: Counting Digits'
 forumTopicId: 301787
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-157-solving-the-diophantine-equation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-157-solving-the-diophantine-equation.english.md
index eb98032f8c..1049de1f76 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-157-solving-the-diophantine-equation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-157-solving-the-diophantine-equation.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4091000cf542c50ff1c
 challengeType: 5
+isHidden: false
 title: 'Problem 157: Solving the diophantine equation'
 forumTopicId: 301788
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.english.md
index 219a9ba967..cd7e864480 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40a1000cf542c50ff1d
 challengeType: 5
+isHidden: false
 title: 'Problem 158: Exploring strings for which only one character comes lexicographically after its neighbour to the left'
 forumTopicId: 301789
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-159-digital-root-sums-of-factorisations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-159-digital-root-sums-of-factorisations.english.md
index 3ddafa2007..ee9d4e7d80 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-159-digital-root-sums-of-factorisations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-159-digital-root-sums-of-factorisations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40c1000cf542c50ff1e
 challengeType: 5
+isHidden: false
 title: 'Problem 159: Digital root sums of factorisations'
 forumTopicId: 301790
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-16-power-digit-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-16-power-digit-sum.english.md
index 9070e79235..543e7841f9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-16-power-digit-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-16-power-digit-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37d1000cf542c50fe8f
 challengeType: 5
+isHidden: false
 title: 'Problem 16: Power digit sum'
 forumTopicId: 301791
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-160-factorial-trailing-digits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-160-factorial-trailing-digits.english.md
index fa859fed13..9c2a68ccf8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-160-factorial-trailing-digits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-160-factorial-trailing-digits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40d1000cf542c50ff1f
 challengeType: 5
+isHidden: false
 title: 'Problem 160: Factorial trailing digits'
 forumTopicId: 301794
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-161-triominoes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-161-triominoes.english.md
index 55f6c68796..5cf7bca3c0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-161-triominoes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-161-triominoes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40d1000cf542c50ff20
 challengeType: 5
+isHidden: false
 title: 'Problem 161: Triominoes'
 forumTopicId: 301795
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-162-hexadecimal-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-162-hexadecimal-numbers.english.md
index 09ce7f0c7a..d651388284 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-162-hexadecimal-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-162-hexadecimal-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40e1000cf542c50ff21
 challengeType: 5
+isHidden: false
 title: 'Problem 162: Hexadecimal numbers'
 forumTopicId: 301796
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-163-cross-hatched-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-163-cross-hatched-triangles.english.md
index 3be211c948..301f5da2fb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-163-cross-hatched-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-163-cross-hatched-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f40f1000cf542c50ff22
 challengeType: 5
+isHidden: false
 title: 'Problem 163: Cross-hatched triangles'
 forumTopicId: 301797
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.english.md
index 633e52c8c8..479b7cfa8d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4111000cf542c50ff23
 challengeType: 5
+isHidden: false
 title: 'Problem 164: Numbers for which no three consecutive digits have a sum greater than a given value'
 forumTopicId: 301798
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-165-intersections.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-165-intersections.english.md
index 5bb1166bf1..297e6f66bc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-165-intersections.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-165-intersections.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4111000cf542c50ff24
 challengeType: 5
+isHidden: false
 title: 'Problem 165: Intersections'
 forumTopicId: 301799
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-166-criss-cross.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-166-criss-cross.english.md
index c3c4949cd5..abf660d015 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-166-criss-cross.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-166-criss-cross.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4131000cf542c50ff25
 challengeType: 5
+isHidden: false
 title: 'Problem 166: Criss Cross'
 forumTopicId: 301800
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-167-investigating-ulam-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-167-investigating-ulam-sequences.english.md
index 4bf712fb07..25e105fadd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-167-investigating-ulam-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-167-investigating-ulam-sequences.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4141000cf542c50ff26
 challengeType: 5
+isHidden: false
 title: 'Problem 167: Investigating Ulam sequences'
 forumTopicId: 301801
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-168-number-rotations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-168-number-rotations.english.md
index 75fd32fefe..f11c71fc16 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-168-number-rotations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-168-number-rotations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4151000cf542c50ff27
 challengeType: 5
+isHidden: false
 title: 'Problem 168: Number Rotations'
 forumTopicId: 301802
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
index 0da794368c..7318dd1b90 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4151000cf542c50ff28
 challengeType: 5
+isHidden: false
 title: 'Problem 169: Exploring the number of different ways a number can be expressed as a sum of powers of 2'
 forumTopicId: 301803
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-17-number-letter-counts.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-17-number-letter-counts.english.md
index 4ee073689e..47b6129323 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-17-number-letter-counts.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-17-number-letter-counts.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37d1000cf542c50fe90
 challengeType: 5
+isHidden: false
 title: 'Problem 17: Number letter counts'
 forumTopicId: 301804
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.english.md
index 7ffbb6aff4..0fb886297e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4161000cf542c50ff29
 challengeType: 5
+isHidden: false
 title: 'Problem 170: Find the largest 0 to 9 pandigital that can be formed by concatenating products'
 forumTopicId: 301805
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.english.md
index 33e796d001..7ff3cd2a22 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4181000cf542c50ff2a
 challengeType: 5
+isHidden: false
 title: 'Problem 171: Finding numbers for which the sum of the squares of the digits is a square'
 forumTopicId: 301806
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-172-investigating-numbers-with-few-repeated-digits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-172-investigating-numbers-with-few-repeated-digits.english.md
index f14f911bb4..03af38fed4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-172-investigating-numbers-with-few-repeated-digits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-172-investigating-numbers-with-few-repeated-digits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4181000cf542c50ff2b
 challengeType: 5
+isHidden: false
 title: 'Problem 172: Investigating numbers with few repeated digits'
 forumTopicId: 301807
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.english.md
index e5292681e0..0b6727ceea 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41a1000cf542c50ff2c
 challengeType: 5
+isHidden: false
 title: 'Problem 173: Using up to one million tiles how many different "hollow" square laminae can be formed?'
 forumTopicId: 301808
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.english.md
index c50ccf9614..9d05996132 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41a1000cf542c50ff2d
 challengeType: 5
+isHidden: false
 title: 'Problem 174: Counting the number of "hollow" square laminae that can form one, two, three, ... distinct arrangements'
 forumTopicId: 301809
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
index 0b0eac0190..89c3c62004 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41c1000cf542c50ff2e
 challengeType: 5
+isHidden: false
 title: 'Problem 175: Fractions involving the number of different ways a number can be expressed as a sum of powers of 2'
 forumTopicId: 301810
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-176-right-angled-triangles-that-share-a-cathetus.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-176-right-angled-triangles-that-share-a-cathetus.english.md
index aeeaf82ec0..c468dc3d17 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-176-right-angled-triangles-that-share-a-cathetus.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-176-right-angled-triangles-that-share-a-cathetus.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41c1000cf542c50ff2f
 challengeType: 5
+isHidden: false
 title: 'Problem 176: Right-angled triangles that share a cathetus'
 forumTopicId: 301811
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-177-integer-angled-quadrilaterals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-177-integer-angled-quadrilaterals.english.md
index b1907d2148..4f12be7983 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-177-integer-angled-quadrilaterals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-177-integer-angled-quadrilaterals.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41e1000cf542c50ff30
 challengeType: 5
+isHidden: false
 title: 'Problem 177: Integer angled Quadrilaterals'
 forumTopicId: 301812
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-178-step-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-178-step-numbers.english.md
index f0617c455b..3ee93b0f44 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-178-step-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-178-step-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41e1000cf542c50ff31
 challengeType: 5
+isHidden: false
 title: 'Problem 178: Step Numbers'
 forumTopicId: 301813
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-179-consecutive-positive-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-179-consecutive-positive-divisors.english.md
index 6c93b8ebfc..b0c0efb17e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-179-consecutive-positive-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-179-consecutive-positive-divisors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f41f1000cf542c50ff32
 challengeType: 5
+isHidden: false
 title: 'Problem 179: Consecutive positive divisors'
 forumTopicId: 301814
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-18-maximum-path-sum-i.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-18-maximum-path-sum-i.english.md
index f0d57c511c..03c6266939 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-18-maximum-path-sum-i.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-18-maximum-path-sum-i.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37e1000cf542c50fe91
 challengeType: 5
+isHidden: false
 title: 'Problem 18: Maximum path sum I'
 forumTopicId: 301815
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-180-rational-zeros-of-a-function-of-three-variables.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-180-rational-zeros-of-a-function-of-three-variables.english.md
index 3657d41be5..16c6438eff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-180-rational-zeros-of-a-function-of-three-variables.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-180-rational-zeros-of-a-function-of-three-variables.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4201000cf542c50ff33
 challengeType: 5
+isHidden: false
 title: 'Problem 180: Rational zeros of a function of three variables'
 forumTopicId: 301816
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.english.md
index 02cc2ea738..4b15a958e8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4231000cf542c50ff34
 challengeType: 5
+isHidden: false
 title: 'Problem 181: Investigating in how many ways objects of two different colours can be grouped'
 forumTopicId: 301817
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-182-rsa-encryption.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-182-rsa-encryption.english.md
index 7b0fba6579..9f2467f379 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-182-rsa-encryption.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-182-rsa-encryption.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4231000cf542c50ff35
 challengeType: 5
+isHidden: false
 title: 'Problem 182: RSA encryption'
 forumTopicId: 301818
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-183-maximum-product-of-parts.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-183-maximum-product-of-parts.english.md
index 19666cac62..9dfd196936 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-183-maximum-product-of-parts.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-183-maximum-product-of-parts.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4231000cf542c50ff36
 challengeType: 5
+isHidden: false
 title: 'Problem 183: Maximum product of parts'
 forumTopicId: 301819
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-184-triangles-containing-the-origin.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-184-triangles-containing-the-origin.english.md
index 1900e92b0c..819e0636ee 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-184-triangles-containing-the-origin.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-184-triangles-containing-the-origin.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4241000cf542c50ff37
 challengeType: 5
+isHidden: false
 title: 'Problem 184: Triangles containing the origin'
 forumTopicId: 301820
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-185-number-mind.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-185-number-mind.english.md
index a4bcdfed73..69bc64a903 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-185-number-mind.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-185-number-mind.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4251000cf542c50ff38
 challengeType: 5
+isHidden: false
 title: 'Problem 185: Number Mind'
 forumTopicId: 301821
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-186-connectedness-of-a-network.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-186-connectedness-of-a-network.english.md
index 03b55be5d8..f8220532d5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-186-connectedness-of-a-network.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-186-connectedness-of-a-network.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4281000cf542c50ff39
 challengeType: 5
+isHidden: false
 title: 'Problem 186: Connectedness of a network'
 forumTopicId: 301822
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-187-semiprimes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-187-semiprimes.english.md
index ab5c6634e9..207e5d52b5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-187-semiprimes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-187-semiprimes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4291000cf542c50ff3a
 challengeType: 5
+isHidden: false
 title: 'Problem 187: Semiprimes'
 forumTopicId: 301823
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-188-the-hyperexponentiation-of-a-number.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-188-the-hyperexponentiation-of-a-number.english.md
index 4684c35890..84ad48684e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-188-the-hyperexponentiation-of-a-number.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-188-the-hyperexponentiation-of-a-number.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4291000cf542c50ff3b
 challengeType: 5
+isHidden: false
 title: 'Problem 188: The hyperexponentiation of a number'
 forumTopicId: 301824
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-189-tri-colouring-a-triangular-grid.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-189-tri-colouring-a-triangular-grid.english.md
index c784e483e2..d9ed4fd40b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-189-tri-colouring-a-triangular-grid.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-189-tri-colouring-a-triangular-grid.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4291000cf542c50ff3c
 challengeType: 5
+isHidden: false
 title: 'Problem 189: Tri-colouring a triangular grid'
 forumTopicId: 301825
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-19-counting-sundays.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-19-counting-sundays.english.md
index 8fa027b27b..f635698596 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-19-counting-sundays.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-19-counting-sundays.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f37f1000cf542c50fe92
 challengeType: 5
+isHidden: false
 title: 'Problem 19: Counting Sundays'
 forumTopicId: 301827
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-190-maximising-a-weighted-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-190-maximising-a-weighted-product.english.md
index a9cd54b8a8..d96a39af9c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-190-maximising-a-weighted-product.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-190-maximising-a-weighted-product.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f42b1000cf542c50ff3d
 challengeType: 5
+isHidden: false
 title: 'Problem 190: Maximising a weighted product'
 forumTopicId: 301828
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-191-prize-strings.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-191-prize-strings.english.md
index 1e0e4b2a75..71670ac192 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-191-prize-strings.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-191-prize-strings.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f42b1000cf542c50ff3e
 challengeType: 5
+isHidden: false
 title: 'Problem 191: Prize Strings'
 forumTopicId: 301829
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-192-best-approximations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-192-best-approximations.english.md
index 4a59cea4da..135c6442f6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-192-best-approximations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-192-best-approximations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f42c1000cf542c50ff3f
 challengeType: 5
+isHidden: false
 title: 'Problem 192: Best Approximations'
 forumTopicId: 301830
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-193-squarefree-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-193-squarefree-numbers.english.md
index 156223865c..fb0d853075 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-193-squarefree-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-193-squarefree-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f42f1000cf542c50ff41
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 title: 'Problem 193: Squarefree Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-194-coloured-configurations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-194-coloured-configurations.english.md
index 89594b5ead..54270462d5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-194-coloured-configurations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-194-coloured-configurations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f42f1000cf542c50ff40
 challengeType: 5
+isHidden: false
 title: 'Problem 194: Coloured Configurations'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-195-inscribed-circles-of-triangles-with-one-angle-of-60-degrees.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-195-inscribed-circles-of-triangles-with-one-angle-of-60-degrees.english.md
index 9a88608220..e54d27bea9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-195-inscribed-circles-of-triangles-with-one-angle-of-60-degrees.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-195-inscribed-circles-of-triangles-with-one-angle-of-60-degrees.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4311000cf542c50ff43
 challengeType: 5
+isHidden: false
 title: 'Problem 195: Inscribed circles of triangles with one angle of 60 degrees'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-196-prime-triplets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-196-prime-triplets.english.md
index a03e9330a9..5dc32b678f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-196-prime-triplets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-196-prime-triplets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4301000cf542c50ff42
 challengeType: 5
+isHidden: false
 title: 'Problem 196: Prime triplets'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.english.md
index 45ab18b9ca..693173ed4d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4311000cf542c50ff44
 challengeType: 5
+isHidden: false
 title: 'Problem 197: Investigating the behaviour of a recursively defined sequence'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-198-ambiguous-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-198-ambiguous-numbers.english.md
index 1e4b599cea..d4cccf5979 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-198-ambiguous-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-198-ambiguous-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4331000cf542c50ff45
 challengeType: 5
+isHidden: false
 title: 'Problem 198: Ambiguous Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-199-iterative-circle-packing.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-199-iterative-circle-packing.english.md
index 1da856e3f2..7ea4bc51bb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-199-iterative-circle-packing.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-199-iterative-circle-packing.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4341000cf542c50ff46
 challengeType: 5
+isHidden: false
 title: 'Problem 199: Iterative Circle Packing'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-2-even-fibonacci-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-2-even-fibonacci-numbers.english.md
index 7436258864..1f6e7d952d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-2-even-fibonacci-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-2-even-fibonacci-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f36e1000cf542c50fe81
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+isHidden: false
 title: 'Problem 2: Even Fibonacci Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-20-factorial-digit-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-20-factorial-digit-sum.english.md
index 8b0814905a..c92a8efb14 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-20-factorial-digit-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-20-factorial-digit-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3801000cf542c50fe93
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+isHidden: false
 title: 'Problem 20: Factorial digit sum'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.english.md
index 90caa69ec4..24e4a45536 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4351000cf542c50ff47
 challengeType: 5
+isHidden: false
 title: 'Problem 200: Find the 200th prime-proof sqube containing the contiguous sub-string "200"'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-201-subsets-with-a-unique-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-201-subsets-with-a-unique-sum.english.md
index ab08c1c083..d1548d8f20 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-201-subsets-with-a-unique-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-201-subsets-with-a-unique-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4361000cf542c50ff48
 challengeType: 5
+isHidden: false
 title: 'Problem 201: Subsets with a unique sum'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-202-laserbeam.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-202-laserbeam.english.md
index c8337f859d..5915cb130d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-202-laserbeam.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-202-laserbeam.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4371000cf542c50ff49
 challengeType: 5
+isHidden: false
 title: 'Problem 202: Laserbeam'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-203-squarefree-binomial-coefficients.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-203-squarefree-binomial-coefficients.english.md
index d69e0fc644..5d980ffb67 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-203-squarefree-binomial-coefficients.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-203-squarefree-binomial-coefficients.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4381000cf542c50ff4a
 challengeType: 5
+isHidden: false
 title: 'Problem 203: Squarefree Binomial Coefficients'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-204-generalised-hamming-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-204-generalised-hamming-numbers.english.md
index b026970889..8e009a7851 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-204-generalised-hamming-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-204-generalised-hamming-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4381000cf542c50ff4b
 challengeType: 5
+isHidden: false
 title: 'Problem 204: Generalised Hamming Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-205-dice-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-205-dice-game.english.md
index 06fcef0ffe..6eeaec8d3e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-205-dice-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-205-dice-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4391000cf542c50ff4c
 challengeType: 5
+isHidden: false
 title: 'Problem 205: Dice Game'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-206-concealed-square.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-206-concealed-square.english.md
index 4b4f8de1cd..a442cf657e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-206-concealed-square.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-206-concealed-square.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43a1000cf542c50ff4d
 challengeType: 5
+isHidden: false
 title: 'Problem 206: Concealed Square'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-207-integer-partition-equations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-207-integer-partition-equations.english.md
index 0d6d08cac6..de2c2a5e06 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-207-integer-partition-equations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-207-integer-partition-equations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43c1000cf542c50ff4e
 challengeType: 5
+isHidden: false
 title: 'Problem 207: Integer partition equations'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-208-robot-walks.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-208-robot-walks.english.md
index 2dc50781e2..4ea27d06d6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-208-robot-walks.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-208-robot-walks.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43f1000cf542c50ff51
 challengeType: 5
+isHidden: false
 title: 'Problem 208: Robot Walks'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-209-circular-logic.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-209-circular-logic.english.md
index dc95d8bf4d..53d117f53e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-209-circular-logic.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-209-circular-logic.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43e1000cf542c50ff4f
 challengeType: 5
+isHidden: false
 title: 'Problem 209: Circular Logic'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-21-amicable-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-21-amicable-numbers.english.md
index bec9504ffa..18bda16d4b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-21-amicable-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-21-amicable-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3811000cf542c50fe94
 challengeType: 5
+isHidden: false
 title: 'Problem 21: Amicable numbers'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-210-obtuse-angled-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-210-obtuse-angled-triangles.english.md
index e2f689986d..d7d84ad38d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-210-obtuse-angled-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-210-obtuse-angled-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43e1000cf542c50ff50
 challengeType: 5
+isHidden: false
 title: 'Problem 210: Obtuse Angled Triangles'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-211-divisor-square-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-211-divisor-square-sum.english.md
index f23cc98d43..475e2b1764 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-211-divisor-square-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-211-divisor-square-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f43f1000cf542c50ff52
 challengeType: 5
+isHidden: false
 title: 'Problem 211: Divisor Square Sum'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-212-combined-volume-of-cuboids.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-212-combined-volume-of-cuboids.english.md
index 827f76c215..7e9f247fa1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-212-combined-volume-of-cuboids.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-212-combined-volume-of-cuboids.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4411000cf542c50ff53
 challengeType: 5
+isHidden: false
 title: 'Problem 212: Combined Volume of Cuboids'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-213-flea-circus.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-213-flea-circus.english.md
index 2f3d27da4b..6fce134867 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-213-flea-circus.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-213-flea-circus.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4411000cf542c50ff54
 challengeType: 5
+isHidden: false
 title: 'Problem 213: Flea Circus'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-214-totient-chains.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-214-totient-chains.english.md
index 268b4b884a..7387b6823e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-214-totient-chains.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-214-totient-chains.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4421000cf542c50ff55
 challengeType: 5
+isHidden: false
 title: 'Problem 214: Totient Chains'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-215-crack-free-walls.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-215-crack-free-walls.english.md
index e80adc26fd..6f449f9cf4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-215-crack-free-walls.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-215-crack-free-walls.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4431000cf542c50ff56
 challengeType: 5
+isHidden: false
 title: 'Problem 215: Crack-free Walls'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-216-investigating-the-primality-of-numbers-of-the-form-2n2-1.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-216-investigating-the-primality-of-numbers-of-the-form-2n2-1.english.md
index 3558f187f8..ea1103c984 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-216-investigating-the-primality-of-numbers-of-the-form-2n2-1.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-216-investigating-the-primality-of-numbers-of-the-form-2n2-1.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4451000cf542c50ff57
 challengeType: 5
+isHidden: false
 title: 'Problem 216: Investigating the primality of numbers of the form 2n2-1'
 forumTopicId: 301858
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-217-balanced-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-217-balanced-numbers.english.md
index ee9ebdf61b..dd16c3403f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-217-balanced-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-217-balanced-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4461000cf542c50ff58
 challengeType: 5
+isHidden: false
 title: 'Problem 217: Balanced Numbers'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-218-perfect-right-angled-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-218-perfect-right-angled-triangles.english.md
index d30a4f3fda..d03975f9d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-218-perfect-right-angled-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-218-perfect-right-angled-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4461000cf542c50ff59
 challengeType: 5
+isHidden: false
 title: 'Problem 218: Perfect right-angled triangles'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-219-skew-cost-coding.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-219-skew-cost-coding.english.md
index eb4619049a..9932cab907 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-219-skew-cost-coding.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-219-skew-cost-coding.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4481000cf542c50ff5a
 challengeType: 5
+isHidden: false
 title: 'Problem 219: Skew-cost coding'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-22-names-scores.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-22-names-scores.english.md
index 24b9a213ab..accf62afcf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-22-names-scores.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-22-names-scores.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-220-heighway-dragon.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-220-heighway-dragon.english.md
index 71374a7058..803ace65ef 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-220-heighway-dragon.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-220-heighway-dragon.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-221-alexandrian-integers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-221-alexandrian-integers.english.md
index 0c920fe32f..c54726f229 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-221-alexandrian-integers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-221-alexandrian-integers.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-222-sphere-packing.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-222-sphere-packing.english.md
index 1c516e7416..df0914f1f0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-222-sphere-packing.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-222-sphere-packing.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-223-almost-right-angled-triangles-i.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-223-almost-right-angled-triangles-i.english.md
index 6f6c8a425d..8e84abfb42 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-223-almost-right-angled-triangles-i.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-223-almost-right-angled-triangles-i.english.md
@@ -1,6 +1,7 @@
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 id: 5900f44b1000cf542c50ff5e
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-224-almost-right-angled-triangles-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-224-almost-right-angled-triangles-ii.english.md
index 54b3fef180..9623a63e9d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-224-almost-right-angled-triangles-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-224-almost-right-angled-triangles-ii.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-225-tribonacci-non-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-225-tribonacci-non-divisors.english.md
index e7034e96c6..14164d86d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-225-tribonacci-non-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-225-tribonacci-non-divisors.english.md
@@ -1,6 +1,7 @@
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 id: 5900f44e1000cf542c50ff60
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-226-a-scoop-of-blancmange.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-226-a-scoop-of-blancmange.english.md
index cb8c4b1035..f143076eee 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-226-a-scoop-of-blancmange.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-226-a-scoop-of-blancmange.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4511000cf542c50ff62
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-227-the-chase.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-227-the-chase.english.md
index ae101e286a..5274462a67 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-227-the-chase.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-227-the-chase.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-228-minkowski-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-228-minkowski-sums.english.md
index 14715a08b8..1d4be56427 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-228-minkowski-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-228-minkowski-sums.english.md
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 id: 5900f4511000cf542c50ff63
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-229-four-representations-using-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-229-four-representations-using-squares.english.md
index 00cf6800ed..1fac348262 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-229-four-representations-using-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-229-four-representations-using-squares.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4521000cf542c50ff64
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-23-non-abundant-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-23-non-abundant-sums.english.md
index ee7e57b83f..9557e6cbba 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-23-non-abundant-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-23-non-abundant-sums.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3831000cf542c50fe96
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-230-fibonacci-words.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-230-fibonacci-words.english.md
index 9fb6420410..ae922a1745 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-230-fibonacci-words.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-230-fibonacci-words.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4531000cf542c50ff65
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-231-the-prime-factorisation-of-binomial-coefficients.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-231-the-prime-factorisation-of-binomial-coefficients.english.md
index 2e39edf908..ac1865e11b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-231-the-prime-factorisation-of-binomial-coefficients.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-231-the-prime-factorisation-of-binomial-coefficients.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4531000cf542c50ff66
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+isHidden: false
 title: 'Problem 231: The prime factorisation of binomial coefficients'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-232-the-race.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-232-the-race.english.md
index 98fa0dd6cf..930e67c9e6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-232-the-race.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-232-the-race.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4551000cf542c50ff67
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+isHidden: false
 title: 'Problem 232: The Race'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-233-lattice-points-on-a-circle.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-233-lattice-points-on-a-circle.english.md
index 80235cff7e..26f58fdafe 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-233-lattice-points-on-a-circle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-233-lattice-points-on-a-circle.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4551000cf542c50ff68
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+isHidden: false
 title: 'Problem 233: Lattice points on a circle'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-234-semidivisible-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-234-semidivisible-numbers.english.md
index 8713da1419..bbc0762d13 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-234-semidivisible-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-234-semidivisible-numbers.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4571000cf542c50ff69
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-235-an-arithmetic-geometric-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-235-an-arithmetic-geometric-sequence.english.md
index 966758943a..a1e695e1ad 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-235-an-arithmetic-geometric-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-235-an-arithmetic-geometric-sequence.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4571000cf542c50ff6a
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+isHidden: false
 title: 'Problem 235: An Arithmetic Geometric sequence'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-236-luxury-hampers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-236-luxury-hampers.english.md
index d5e3696dfa..8c41bfd537 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-236-luxury-hampers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-236-luxury-hampers.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4591000cf542c50ff6b
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+isHidden: false
 title: 'Problem 236: Luxury Hampers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-237-tours-on-a-4-x-n-playing-board.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-237-tours-on-a-4-x-n-playing-board.english.md
index 0214828595..331ea1de53 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-237-tours-on-a-4-x-n-playing-board.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-237-tours-on-a-4-x-n-playing-board.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4591000cf542c50ff6c
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+isHidden: false
 title: 'Problem 237: Tours on a 4 x n playing board'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-238-infinite-string-tour.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-238-infinite-string-tour.english.md
index 085d84eb23..8e1899d78d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-238-infinite-string-tour.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-238-infinite-string-tour.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f45b1000cf542c50ff6d
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+isHidden: false
 title: 'Problem 238: Infinite string tour'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-239-twenty-two-foolish-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-239-twenty-two-foolish-primes.english.md
index 840d5dec50..22fea426cf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-239-twenty-two-foolish-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-239-twenty-two-foolish-primes.english.md
@@ -1,6 +1,7 @@
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 id: 5900f45c1000cf542c50ff6e
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+isHidden: false
 title: 'Problem 239: Twenty-two Foolish Primes'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-24-lexicographic-permutations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-24-lexicographic-permutations.english.md
index fd640b3b61..9dbccb3c89 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-24-lexicographic-permutations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-24-lexicographic-permutations.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3841000cf542c50fe97
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+isHidden: false
 title: 'Problem 24: Lexicographic permutations'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-240-top-dice.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-240-top-dice.english.md
index 036a82d1cb..4ff0c7dc4d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-240-top-dice.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-240-top-dice.english.md
@@ -1,6 +1,7 @@
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 id: 5900f45d1000cf542c50ff6f
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+isHidden: false
 title: 'Problem 240: Top Dice'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-241-perfection-quotients.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-241-perfection-quotients.english.md
index 452198e09c..5b86d0a74d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-241-perfection-quotients.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-241-perfection-quotients.english.md
@@ -1,6 +1,7 @@
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 id: 5900f45d1000cf542c50ff70
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+isHidden: false
 title: 'Problem 241: Perfection Quotients'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-242-odd-triplets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-242-odd-triplets.english.md
index dc2cd95389..0aaaa70fb8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-242-odd-triplets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-242-odd-triplets.english.md
@@ -1,6 +1,7 @@
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 id: 5900f45f1000cf542c50ff71
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 title: 'Problem 242: Odd Triplets'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-243-resilience.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-243-resilience.english.md
index 5335f6430a..379387f495 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-243-resilience.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-243-resilience.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4601000cf542c50ff73
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+isHidden: false
 title: 'Problem 243: Resilience'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-244-sliders.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-244-sliders.english.md
index 7d278b59a9..9039459be8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-244-sliders.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-244-sliders.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4601000cf542c50ff72
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 title: 'Problem 244: Sliders'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-245-coresilience.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-245-coresilience.english.md
index 8882490619..088bf42c7f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-245-coresilience.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-245-coresilience.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4621000cf542c50ff74
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 title: 'Problem 245: Coresilience'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-246-tangents-to-an-ellipse.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-246-tangents-to-an-ellipse.english.md
index 8d21e1e9e7..c55f00fb7c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-246-tangents-to-an-ellipse.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-246-tangents-to-an-ellipse.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4621000cf542c50ff75
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+isHidden: false
 title: 'Problem 246: Tangents to an ellipse'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-247-squares-under-a-hyperbola.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-247-squares-under-a-hyperbola.english.md
index 99f434bf09..eb1319c140 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-247-squares-under-a-hyperbola.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-247-squares-under-a-hyperbola.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-248-numbers-for-which-eulers-totient-function-equals-13.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-248-numbers-for-which-eulers-totient-function-equals-13.english.md
index f87061ad7a..17d638d2a6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-248-numbers-for-which-eulers-totient-function-equals-13.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-248-numbers-for-which-eulers-totient-function-equals-13.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4651000cf542c50ff77
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-249-prime-subset-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-249-prime-subset-sums.english.md
index 81ed506608..1a1aa25b59 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-249-prime-subset-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-249-prime-subset-sums.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4671000cf542c50ff79
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 title: 'Problem 249: Prime Subset Sums'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-25-1000-digit-fibonacci-number.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-25-1000-digit-fibonacci-number.english.md
index 3c0fa273f1..df30c13a50 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-25-1000-digit-fibonacci-number.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-25-1000-digit-fibonacci-number.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-250-250250.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-250-250250.english.md
index ec85ab7f71..7c4d98e470 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-250-250250.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-250-250250.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4661000cf542c50ff78
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-251-cardano-triplets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-251-cardano-triplets.english.md
index 4f4ef30d37..1a372822e8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-251-cardano-triplets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-251-cardano-triplets.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4671000cf542c50ff7a
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-252-convex-holes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-252-convex-holes.english.md
index 653199f47a..4c6d8df21c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-252-convex-holes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-252-convex-holes.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4691000cf542c50ff7b
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-253-tidying-up.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-253-tidying-up.english.md
index 50e2b408da..877e2955f9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-253-tidying-up.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-253-tidying-up.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4691000cf542c50ff7c
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+isHidden: false
 title: 'Problem 253: Tidying up'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-254-sums-of-digit-factorials.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-254-sums-of-digit-factorials.english.md
index 9129aec3df..fc2e7b8044 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-254-sums-of-digit-factorials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-254-sums-of-digit-factorials.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-255-rounded-square-roots.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-255-rounded-square-roots.english.md
index b17cda4c88..299edcf664 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-255-rounded-square-roots.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-255-rounded-square-roots.english.md
@@ -1,6 +1,7 @@
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 id: 5900f46d1000cf542c50ff7f
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 title: 'Problem 255: Rounded Square Roots'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-256-tatami-free-rooms.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-256-tatami-free-rooms.english.md
index 893695c376..9be9abbd27 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-256-tatami-free-rooms.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-256-tatami-free-rooms.english.md
@@ -1,6 +1,7 @@
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 id: 5900f46c1000cf542c50ff7e
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 title: 'Problem 256: Tatami-Free Rooms'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-257-angular-bisectors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-257-angular-bisectors.english.md
index e09294454d..64825720c8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-257-angular-bisectors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-257-angular-bisectors.english.md
@@ -1,6 +1,7 @@
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 id: 5900f46e1000cf542c50ff80
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 title: 'Problem 257: Angular Bisectors'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-258-a-lagged-fibonacci-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-258-a-lagged-fibonacci-sequence.english.md
index 2343ce2d5f..5091efd6b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-258-a-lagged-fibonacci-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-258-a-lagged-fibonacci-sequence.english.md
@@ -1,6 +1,7 @@
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 id: 5900f46e1000cf542c50ff81
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 title: 'Problem 258: A lagged Fibonacci sequence'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-259-reachable-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-259-reachable-numbers.english.md
index fbc4952ddb..028f21bcf2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-259-reachable-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-259-reachable-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4701000cf542c50ff82
 challengeType: 5
+isHidden: false
 title: 'Problem 259: Reachable Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-26-reciprocal-cycles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-26-reciprocal-cycles.english.md
index d370f1fe36..83ab0825d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-26-reciprocal-cycles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-26-reciprocal-cycles.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3861000cf542c50fe99
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 title: 'Problem 26: Reciprocal cycles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-260-stone-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-260-stone-game.english.md
index 2b969a92f9..5536969b52 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-260-stone-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-260-stone-game.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4701000cf542c50ff83
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+isHidden: false
 title: 'Problem 260: Stone Game'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-261-pivotal-square-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-261-pivotal-square-sums.english.md
index 400ae1fa04..b7c22c1736 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-261-pivotal-square-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-261-pivotal-square-sums.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4711000cf542c50ff84
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+isHidden: false
 title: 'Problem 261: Pivotal Square Sums'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-262-mountain-range.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-262-mountain-range.english.md
index 7a55065a46..5213ded006 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-262-mountain-range.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-262-mountain-range.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4731000cf542c50ff85
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+isHidden: false
 title: 'Problem 262: Mountain Range'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-263-an-engineers-dream-come-true.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-263-an-engineers-dream-come-true.english.md
index 84c35f7d5d..5053b9cbe2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-263-an-engineers-dream-come-true.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-263-an-engineers-dream-come-true.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4741000cf542c50ff86
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 title: 'Problem 263: An engineers'' dream come true'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-264-triangle-centres.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-264-triangle-centres.english.md
index a1b4c7e18e..5d6f683f0d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-264-triangle-centres.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-264-triangle-centres.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4751000cf542c50ff87
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 title: 'Problem 264: Triangle Centres'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-265-binary-circles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-265-binary-circles.english.md
index a0503ac16c..d357b9e687 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-265-binary-circles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-265-binary-circles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4761000cf542c50ff88
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 title: 'Problem 265: Binary Circles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-266-pseudo-square-root.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-266-pseudo-square-root.english.md
index 8db5eccd90..ab7da5faa3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-266-pseudo-square-root.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-266-pseudo-square-root.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4771000cf542c50ff89
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-267-billionaire.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-267-billionaire.english.md
index 9c121bc4ac..45384ae73b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-267-billionaire.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-267-billionaire.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4771000cf542c50ff8a
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+isHidden: false
 title: 'Problem 267: Billionaire'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.english.md
index 1cf77c8fc2..a84261573a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4791000cf542c50ff8b
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 title: 'Problem 268: Counting numbers with at least four distinct prime factors less than 100'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-269-polynomials-with-at-least-one-integer-root.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-269-polynomials-with-at-least-one-integer-root.english.md
index 1f83509e95..a1af55751c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-269-polynomials-with-at-least-one-integer-root.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-269-polynomials-with-at-least-one-integer-root.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4791000cf542c50ff8c
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 title: 'Problem 269: Polynomials with at least one integer root'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-27-quadratic-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-27-quadratic-primes.english.md
index d038a859c6..f03457ed61 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-27-quadratic-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-27-quadratic-primes.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3871000cf542c50fe9a
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-270-cutting-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-270-cutting-squares.english.md
index 033d361b2c..91ef094a09 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-270-cutting-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-270-cutting-squares.english.md
@@ -1,6 +1,7 @@
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 id: 5900f47c1000cf542c50ff8e
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 title: 'Problem 270: Cutting Squares'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-271-modular-cubes-part-1.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-271-modular-cubes-part-1.english.md
index 55be7dabad..ba47de490e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-271-modular-cubes-part-1.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-271-modular-cubes-part-1.english.md
@@ -1,6 +1,7 @@
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 id: 5900f47b1000cf542c50ff8d
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-272-modular-cubes-part-2.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-272-modular-cubes-part-2.english.md
index df1a6e9657..11787a8c80 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-272-modular-cubes-part-2.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-272-modular-cubes-part-2.english.md
@@ -1,6 +1,7 @@
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 id: 5900f47d1000cf542c50ff8f
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 title: 'Problem 272: Modular Cubes, part 2'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-273-sum-of-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-273-sum-of-squares.english.md
index b20262bc76..7ff21a858c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-273-sum-of-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-273-sum-of-squares.english.md
@@ -1,6 +1,7 @@
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 id: 5900f47e1000cf542c50ff90
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-274-divisibility-multipliers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-274-divisibility-multipliers.english.md
index 788432e60a..0445a75837 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-274-divisibility-multipliers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-274-divisibility-multipliers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f47f1000cf542c50ff91
 challengeType: 5
+isHidden: false
 title: 'Problem 274: Divisibility Multipliers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-275-balanced-sculptures.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-275-balanced-sculptures.english.md
index 8f8a76979d..b8435feee6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-275-balanced-sculptures.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-275-balanced-sculptures.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4801000cf542c50ff92
 challengeType: 5
+isHidden: false
 title: 'Problem 275: Balanced Sculptures'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-276-primitive-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-276-primitive-triangles.english.md
index fe27f59c8e..5480601a04 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-276-primitive-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-276-primitive-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4801000cf542c50ff93
 challengeType: 5
+isHidden: false
 title: 'Problem 276: Primitive Triangles'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-277-a-modified-collatz-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-277-a-modified-collatz-sequence.english.md
index 10b1ab2d44..721bb27610 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-277-a-modified-collatz-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-277-a-modified-collatz-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4811000cf542c50ff94
 challengeType: 5
+isHidden: false
 title: 'Problem 277: A Modified Collatz sequence'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-278-linear-combinations-of-semiprimes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-278-linear-combinations-of-semiprimes.english.md
index d32aaf79fc..c9e2be2b99 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-278-linear-combinations-of-semiprimes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-278-linear-combinations-of-semiprimes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4831000cf542c50ff95
 challengeType: 5
+isHidden: false
 title: 'Problem 278: Linear Combinations of Semiprimes'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-279-triangles-with-integral-sides-and-an-integral-angle.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-279-triangles-with-integral-sides-and-an-integral-angle.english.md
index 05243f23f9..4254b5e493 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-279-triangles-with-integral-sides-and-an-integral-angle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-279-triangles-with-integral-sides-and-an-integral-angle.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4841000cf542c50ff96
 challengeType: 5
+isHidden: false
 title: 'Problem 279: Triangles with integral sides and an integral angle'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-28-number-spiral-diagonals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-28-number-spiral-diagonals.english.md
index ecc5fe1e67..5acac45a44 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-28-number-spiral-diagonals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-28-number-spiral-diagonals.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3881000cf542c50fe9b
 challengeType: 5
+isHidden: false
 title: 'Problem 28: Number spiral diagonals'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-280-ant-and-seeds.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-280-ant-and-seeds.english.md
index d7d2db18ee..b6226df1b7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-280-ant-and-seeds.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-280-ant-and-seeds.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4841000cf542c50ff97
 challengeType: 5
+isHidden: false
 title: 'Problem 280: Ant and seeds'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-281-pizza-toppings.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-281-pizza-toppings.english.md
index 856b2dafef..46a3679c1f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-281-pizza-toppings.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-281-pizza-toppings.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4861000cf542c50ff98
 challengeType: 5
+isHidden: false
 title: 'Problem 281: Pizza Toppings'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-282-the-ackermann-function.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-282-the-ackermann-function.english.md
index 1194fd5a27..6a0d59b382 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-282-the-ackermann-function.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-282-the-ackermann-function.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4861000cf542c50ff99
 challengeType: 5
+isHidden: false
 title: 'Problem 282: The Ackermann function'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-283-integer-sided-triangles-for-which-the-area--perimeter-ratio-is-integral.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-283-integer-sided-triangles-for-which-the-area--perimeter-ratio-is-integral.english.md
index b69fa5803c..a2175ff99f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-283-integer-sided-triangles-for-which-the-area--perimeter-ratio-is-integral.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-283-integer-sided-triangles-for-which-the-area--perimeter-ratio-is-integral.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4881000cf542c50ff9a
 challengeType: 5
+isHidden: false
 title: 'Problem 283: Integer sided triangles for which the area * perimeter ratio is integral'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-284-steady-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-284-steady-squares.english.md
index 1b5b37ed03..c823b2f589 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-284-steady-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-284-steady-squares.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4891000cf542c50ff9b
 challengeType: 5
+isHidden: false
 title: 'Problem 284: Steady Squares'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-285-pythagorean-odds.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-285-pythagorean-odds.english.md
index 62675ae3af..7af0a66109 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-285-pythagorean-odds.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-285-pythagorean-odds.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48a1000cf542c50ff9c
 challengeType: 5
+isHidden: false
 title: 'Problem 285: Pythagorean odds'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-286-scoring-probabilities.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-286-scoring-probabilities.english.md
index 8f9c97758d..d32eaa6f23 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-286-scoring-probabilities.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-286-scoring-probabilities.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48a1000cf542c50ff9d
 challengeType: 5
+isHidden: false
 title: 'Problem 286: Scoring probabilities'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-287-quadtree-encoding-a-simple-compression-algorithm.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-287-quadtree-encoding-a-simple-compression-algorithm.english.md
index c548faec23..813b4499b8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-287-quadtree-encoding-a-simple-compression-algorithm.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-287-quadtree-encoding-a-simple-compression-algorithm.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48b1000cf542c50ff9e
 challengeType: 5
+isHidden: false
 title: 'Problem 287: Quadtree encoding (a simple compression algorithm)'
 forumTopicId: 301938
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-288-an-enormous-factorial.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-288-an-enormous-factorial.english.md
index 3de846c971..56d7bbc8e7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-288-an-enormous-factorial.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-288-an-enormous-factorial.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48d1000cf542c50ff9f
 challengeType: 5
+isHidden: false
 title: 'Problem 288: An enormous factorial'
 forumTopicId: 301939
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-289-eulerian-cycles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-289-eulerian-cycles.english.md
index 6203b91ba4..0fe3463868 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-289-eulerian-cycles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-289-eulerian-cycles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48d1000cf542c50ffa0
 challengeType: 5
+isHidden: false
 title: 'Problem 289: Eulerian Cycles'
 forumTopicId: 301940
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-29-distinct-powers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-29-distinct-powers.english.md
index faa653450e..54a830df91 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-29-distinct-powers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-29-distinct-powers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3891000cf542c50fe9c
 challengeType: 5
+isHidden: false
 title: 'Problem 29: Distinct powers'
 forumTopicId: 301941
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-290-digital-signature.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-290-digital-signature.english.md
index 20c0a83126..986d45c50c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-290-digital-signature.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-290-digital-signature.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48f1000cf542c50ffa1
 challengeType: 5
+isHidden: false
 title: 'Problem 290: Digital Signature'
 forumTopicId: 301942
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-291-panaitopol-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-291-panaitopol-primes.english.md
index 7d0c9a9628..497137e873 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-291-panaitopol-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-291-panaitopol-primes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f48f1000cf542c50ffa2
 challengeType: 5
+isHidden: false
 title: 'Problem 291: Panaitopol Primes'
 forumTopicId: 301943
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-292-pythagorean-polygons.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-292-pythagorean-polygons.english.md
index 968804fd0b..dcaca9d816 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-292-pythagorean-polygons.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-292-pythagorean-polygons.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4911000cf542c50ffa3
 challengeType: 5
+isHidden: false
 title: 'Problem 292: Pythagorean Polygons'
 forumTopicId: 301944
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-293-pseudo-fortunate-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-293-pseudo-fortunate-numbers.english.md
index 6d27527679..6674ab7658 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-293-pseudo-fortunate-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-293-pseudo-fortunate-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4931000cf542c50ffa4
 challengeType: 5
+isHidden: false
 title: 'Problem 293: Pseudo-Fortunate Numbers'
 forumTopicId: 301945
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-294-sum-of-digits---experience-23.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-294-sum-of-digits---experience-23.english.md
index b34ce38cb4..85e5db30e2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-294-sum-of-digits---experience-23.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-294-sum-of-digits---experience-23.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4931000cf542c50ffa5
 challengeType: 5
+isHidden: false
 title: 'Problem 294: Sum of digits - experience #23'
 forumTopicId: 301946
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-295-lenticular-holes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-295-lenticular-holes.english.md
index c3430f0319..c8ac830d20 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-295-lenticular-holes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-295-lenticular-holes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4931000cf542c50ffa6
 challengeType: 5
+isHidden: false
 title: 'Problem 295: Lenticular holes'
 forumTopicId: 301947
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-296-angular-bisector-and-tangent.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-296-angular-bisector-and-tangent.english.md
index ed45d607e3..e19d7bc519 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-296-angular-bisector-and-tangent.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-296-angular-bisector-and-tangent.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4941000cf542c50ffa7
 challengeType: 5
+isHidden: false
 title: 'Problem 296: Angular Bisector and Tangent'
 forumTopicId: 301948
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-297-zeckendorf-representation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-297-zeckendorf-representation.english.md
index 1ad9170108..17dfffeb0d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-297-zeckendorf-representation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-297-zeckendorf-representation.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4951000cf542c50ffa8
 challengeType: 5
+isHidden: false
 title: 'Problem 297: Zeckendorf Representation'
 forumTopicId: 301949
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-298-selective-amnesia.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-298-selective-amnesia.english.md
index 1e2c438476..2ae949ef66 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-298-selective-amnesia.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-298-selective-amnesia.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4971000cf542c50ffa9
 challengeType: 5
+isHidden: false
 title: 'Problem 298: Selective Amnesia'
 forumTopicId: 301950
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-299-three-similar-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-299-three-similar-triangles.english.md
index fc7e5ca104..e132c5dd69 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-299-three-similar-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-299-three-similar-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4971000cf542c50ffaa
 challengeType: 5
+isHidden: false
 title: 'Problem 299: Three similar triangles'
 forumTopicId: 301951
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-3-largest-prime-factor.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-3-largest-prime-factor.english.md
index faf6be781d..c4e0242cc6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-3-largest-prime-factor.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-3-largest-prime-factor.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f36f1000cf542c50fe82
 challengeType: 5
+isHidden: false
 title: 'Problem 3: Largest prime factor'
 forumTopicId: 301952
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-30-digit-n-powers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-30-digit-n-powers.english.md
index cfcdb839c1..aaa7dc269b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-30-digit-n-powers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-30-digit-n-powers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f38a1000cf542c50fe9d
 challengeType: 5
+isHidden: false
 title: 'Problem 30: Digit n powers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-300-protein-folding.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-300-protein-folding.english.md
index 4a339dfe1f..48b8590121 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-300-protein-folding.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-300-protein-folding.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-301-nim.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-301-nim.english.md
index df8a65c931..58148f49ff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-301-nim.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-301-nim.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-302-strong-achilles-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-302-strong-achilles-numbers.english.md
index 46b6c45a1a..09db210df7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-302-strong-achilles-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-302-strong-achilles-numbers.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-303-multiples-with-small-digits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-303-multiples-with-small-digits.english.md
index 958dfec2f2..be3d4e9c22 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-303-multiples-with-small-digits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-303-multiples-with-small-digits.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-304-primonacci.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-304-primonacci.english.md
index 8823f6e85a..cafe6aac22 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-304-primonacci.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-304-primonacci.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-305-reflexive-position.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-305-reflexive-position.english.md
index b0251e4a60..1651f3e2f3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-305-reflexive-position.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-305-reflexive-position.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-306-paper-strip-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-306-paper-strip-game.english.md
index f3e33a8016..8e194c652f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-306-paper-strip-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-306-paper-strip-game.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-307-chip-defects.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-307-chip-defects.english.md
index 06894d5182..b70eca617a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-307-chip-defects.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-307-chip-defects.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-308-an-amazing-prime-generating-automaton.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-308-an-amazing-prime-generating-automaton.english.md
index 7ec9d5efcd..c9bfae3a30 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-308-an-amazing-prime-generating-automaton.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-308-an-amazing-prime-generating-automaton.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-309-integer-ladders.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-309-integer-ladders.english.md
index 93e7a9e853..75b3b139bb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-309-integer-ladders.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-309-integer-ladders.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-31-coin-sums.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-31-coin-sums.english.md
index 7055b66351..2bc3421747 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-31-coin-sums.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-31-coin-sums.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-310-nim-square.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-310-nim-square.english.md
index 2d056f6285..cd8c5ca778 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-310-nim-square.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-311-biclinic-integral-quadrilaterals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-311-biclinic-integral-quadrilaterals.english.md
index 12126f0726..b525771d9b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-311-biclinic-integral-quadrilaterals.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-312-cyclic-paths-on-sierpiski-graphs.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-312-cyclic-paths-on-sierpiski-graphs.english.md
index b90ffb23bf..5aec8a39b5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-312-cyclic-paths-on-sierpiski-graphs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-312-cyclic-paths-on-sierpiski-graphs.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4a51000cf542c50ffb7
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-313-sliding-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-313-sliding-game.english.md
index 1584b94581..7ffab0cbb7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-313-sliding-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-313-sliding-game.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-314-the-mouse-on-the-moon.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-314-the-mouse-on-the-moon.english.md
index b0d277ee01..8ccf8369c8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-314-the-mouse-on-the-moon.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-314-the-mouse-on-the-moon.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4a71000cf542c50ffb9
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-315-digital-root-clocks.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-315-digital-root-clocks.english.md
index 58c8ee47ca..17a56d0b58 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-315-digital-root-clocks.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-315-digital-root-clocks.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4a71000cf542c50ffba
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-316-numbers-in-decimal-expansions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-316-numbers-in-decimal-expansions.english.md
index 63fcaffe98..e1445e575e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-316-numbers-in-decimal-expansions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-316-numbers-in-decimal-expansions.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4a81000cf542c50ffbb
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-317-firecracker.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-317-firecracker.english.md
index d96b647780..38dae81fb7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-317-firecracker.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-317-firecracker.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4aa1000cf542c50ffbc
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-318-2011-nines.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-318-2011-nines.english.md
index a2cb7671e2..25195d5af6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-318-2011-nines.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-318-2011-nines.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-319-bounded-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-319-bounded-sequences.english.md
index e94d7af824..ab3b1f1988 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-319-bounded-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-319-bounded-sequences.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4ab1000cf542c50ffbe
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-32-pandigital-products.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-32-pandigital-products.english.md
index d747538f19..44db3d0af6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-32-pandigital-products.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-32-pandigital-products.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f38c1000cf542c50fe9f
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-320-factorials-divisible-by-a-huge-integer.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-320-factorials-divisible-by-a-huge-integer.english.md
index a10b9bdd4e..551f8a616c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-320-factorials-divisible-by-a-huge-integer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-320-factorials-divisible-by-a-huge-integer.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4ae1000cf542c50ffbf
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+isHidden: false
 title: 'Problem 320: Factorials divisible by a huge integer'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-321-swapping-counters.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-321-swapping-counters.english.md
index ca5f95de80..504d0b93fe 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-321-swapping-counters.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-321-swapping-counters.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4ae1000cf542c50ffc0
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+isHidden: false
 title: 'Problem 321: Swapping Counters'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-322-binomial-coefficients-divisible-by-10.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-322-binomial-coefficients-divisible-by-10.english.md
index 335a9c4a9c..8780156f32 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-322-binomial-coefficients-divisible-by-10.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-322-binomial-coefficients-divisible-by-10.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-323-bitwise-or-operations-on-random-integers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-323-bitwise-or-operations-on-random-integers.english.md
index 87f483f8ee..18c69d5392 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-323-bitwise-or-operations-on-random-integers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-323-bitwise-or-operations-on-random-integers.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4b01000cf542c50ffc2
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-324-building-a-tower.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-324-building-a-tower.english.md
index cd0224f6d6..96923ed7b4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-324-building-a-tower.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-324-building-a-tower.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4b11000cf542c50ffc3
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-325-stone-game-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-325-stone-game-ii.english.md
index 175af63ac2..0f4ca66f7e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-325-stone-game-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-325-stone-game-ii.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4b11000cf542c50ffc4
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 title: 'Problem 325: Stone Game II'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-326-modulo-summations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-326-modulo-summations.english.md
index df5d0051a9..07b77905c0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-326-modulo-summations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-326-modulo-summations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4b21000cf542c50ffc5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-327-rooms-of-doom.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-327-rooms-of-doom.english.md
index 79975596ae..1accc8d7d1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-327-rooms-of-doom.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-327-rooms-of-doom.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4b31000cf542c50ffc6
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+isHidden: false
 title: 'Problem 327: Rooms of Doom'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-328-lowest-cost-search.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-328-lowest-cost-search.english.md
index 5108383435..a3e52ec47c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-328-lowest-cost-search.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-328-lowest-cost-search.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-329-prime-frog.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-329-prime-frog.english.md
index c344dc05a8..03b1e51da4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-329-prime-frog.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-329-prime-frog.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-33-digit-cancelling-fractions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-33-digit-cancelling-fractions.english.md
index 60bf9b22da..426356d0ef 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-33-digit-cancelling-fractions.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-330-eulers-number.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-330-eulers-number.english.md
index fd69a0936f..b8848498cd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-330-eulers-number.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-330-eulers-number.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-331-cross-flips.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-331-cross-flips.english.md
index d78004db12..e4a0cc8bde 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-331-cross-flips.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-332-spherical-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-332-spherical-triangles.english.md
index b621c7a271..dfed5a407b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-332-spherical-triangles.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-333-special-partitions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-333-special-partitions.english.md
index 46749f9b8f..b783399961 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-333-special-partitions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-333-special-partitions.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-334-spilling-the-beans.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-334-spilling-the-beans.english.md
index 25a1792175..fa8399b2e2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-334-spilling-the-beans.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-334-spilling-the-beans.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-335-gathering-the-beans.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-335-gathering-the-beans.english.md
index 9b12579b69..4717aed689 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-335-gathering-the-beans.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-336-maximix-arrangements.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-336-maximix-arrangements.english.md
index 01bb81ffb2..26e51977e6 100644
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+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-336-maximix-arrangements.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-337-totient-stairstep-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-337-totient-stairstep-sequences.english.md
index fb6c6eec5c..c4f859c54e 100644
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-338-cutting-rectangular-grid-paper.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-338-cutting-rectangular-grid-paper.english.md
index b2eae2f3ae..9f658cf1d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-338-cutting-rectangular-grid-paper.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-339-peredur-fab-efrawg.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-339-peredur-fab-efrawg.english.md
index e572d5a109..c7b7768bda 100644
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-34-digit-factorials.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-34-digit-factorials.english.md
index 188def2771..8741e7c382 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-34-digit-factorials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-34-digit-factorials.english.md
@@ -1,6 +1,7 @@
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 id: 5900f38e1000cf542c50fea1
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-340-crazy-function.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-340-crazy-function.english.md
index b4f2c28752..1ffbe23896 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-340-crazy-function.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-340-crazy-function.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-341-golombs-self-describing-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-341-golombs-self-describing-sequence.english.md
index 6011765801..02af6fe898 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-341-golombs-self-describing-sequence.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-342-the-totient-of-a-square-is-a-cube.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-342-the-totient-of-a-square-is-a-cube.english.md
index 6e1da7b1b0..ec7b180371 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-342-the-totient-of-a-square-is-a-cube.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-342-the-totient-of-a-square-is-a-cube.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4c31000cf542c50ffd5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-343-fractional-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-343-fractional-sequences.english.md
index 6e305d4545..a33c5460fe 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-343-fractional-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-343-fractional-sequences.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4c41000cf542c50ffd6
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-344-silver-dollar-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-344-silver-dollar-game.english.md
index fdbbc26ddb..fe9cebaa9e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-344-silver-dollar-game.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-345-matrix-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-345-matrix-sum.english.md
index 4e16c29037..6cc000c793 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-345-matrix-sum.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-346-strong-repunits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-346-strong-repunits.english.md
index 433efc50b9..67a8f82e15 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-346-strong-repunits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-346-strong-repunits.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-347-largest-integer-divisible-by-two-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-347-largest-integer-divisible-by-two-primes.english.md
index efca519830..f4da68221c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-347-largest-integer-divisible-by-two-primes.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-348-sum-of-a-square-and-a-cube.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-348-sum-of-a-square-and-a-cube.english.md
index 4c333c7d47..c68797803c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-348-sum-of-a-square-and-a-cube.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-348-sum-of-a-square-and-a-cube.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4c81000cf542c50ffdb
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-349-langtons-ant.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-349-langtons-ant.english.md
index f9f7f3d291..a173b9d049 100644
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-35-circular-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-35-circular-primes.english.md
index f9e154ac9a..946fa52796 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-35-circular-primes.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-350-constraining-the-least-greatest-and-the-greatest-least.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-350-constraining-the-least-greatest-and-the-greatest-least.english.md
index e8e2119c91..f64b4ec288 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-350-constraining-the-least-greatest-and-the-greatest-least.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-350-constraining-the-least-greatest-and-the-greatest-least.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4cb1000cf542c50ffdd
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-351-hexagonal-orchards.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-351-hexagonal-orchards.english.md
index b5485a657b..0053720527 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-351-hexagonal-orchards.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-351-hexagonal-orchards.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4cb1000cf542c50ffde
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-352-blood-tests.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-352-blood-tests.english.md
index 678d734d1d..1c2976f60a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-352-blood-tests.english.md
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@@ -1,6 +1,7 @@
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 id: 5900f4cd1000cf542c50ffdf
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-353-risky-moon.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-353-risky-moon.english.md
index 875a631521..59962e9d03 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-353-risky-moon.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-353-risky-moon.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4cd1000cf542c50ffe0
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-354-distances-in-a-bees-honeycomb.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-354-distances-in-a-bees-honeycomb.english.md
index 445f417d64..e2eb11d749 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-354-distances-in-a-bees-honeycomb.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-354-distances-in-a-bees-honeycomb.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4cf1000cf542c50ffe1
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-355-maximal-coprime-subset.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-355-maximal-coprime-subset.english.md
index d77c73a29e..188ee3ab16 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-355-maximal-coprime-subset.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-355-maximal-coprime-subset.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.english.md
index 9a79bb4bfc..65a42e6ec4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-357-prime-generating-integers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-357-prime-generating-integers.english.md
index b2b15f69ed..ef521f365b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-357-prime-generating-integers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-357-prime-generating-integers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4d11000cf542c50ffe4
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-358-cyclic-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-358-cyclic-numbers.english.md
index bb745cbdd1..be6d43781a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-358-cyclic-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-358-cyclic-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4d21000cf542c50ffe5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-359-hilberts-new-hotel.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-359-hilberts-new-hotel.english.md
index 27fe6cc060..e51855332c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-359-hilberts-new-hotel.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-359-hilberts-new-hotel.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4d31000cf542c50ffe6
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+isHidden: false
 title: 'Problem 359: Hilbert''s New Hotel'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-36-double-base-palindromes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-36-double-base-palindromes.english.md
index f792feff58..fc81fab919 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-36-double-base-palindromes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-36-double-base-palindromes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3901000cf542c50fea3
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-360-scary-sphere.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-360-scary-sphere.english.md
index a85868f2fb..3117cc3600 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-360-scary-sphere.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-360-scary-sphere.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4d41000cf542c50ffe7
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-361-subsequence-of-thue-morse-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-361-subsequence-of-thue-morse-sequence.english.md
index 4b61865490..a638b4d196 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-361-subsequence-of-thue-morse-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-361-subsequence-of-thue-morse-sequence.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4d51000cf542c50ffe8
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-362-squarefree-factors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-362-squarefree-factors.english.md
index 6d221adcae..68afd507c6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-362-squarefree-factors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-362-squarefree-factors.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-363-bzier-curves.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-363-bzier-curves.english.md
index db6e617c32..68d77a1d4d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-363-bzier-curves.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-363-bzier-curves.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4d91000cf542c50ffeb
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-364-comfortable-distance.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-364-comfortable-distance.english.md
index 4a08fef0ba..f57f8d27ea 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-364-comfortable-distance.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-364-comfortable-distance.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4d91000cf542c50ffea
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-365-a-huge-binomial-coefficient.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-365-a-huge-binomial-coefficient.english.md
index ef0f6e6232..560d556d55 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-365-a-huge-binomial-coefficient.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-365-a-huge-binomial-coefficient.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4da1000cf542c50ffec
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 title: 'Problem 365: A huge binomial coefficient'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-366-stone-game-iii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-366-stone-game-iii.english.md
index 7d1bd8d9d7..9d84af3da6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-366-stone-game-iii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-366-stone-game-iii.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4da1000cf542c50ffed
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 title: 'Problem 366: Stone Game III'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-367-bozo-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-367-bozo-sort.english.md
index 1b49e12929..d624be6c47 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-367-bozo-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-367-bozo-sort.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4db1000cf542c50ffee
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 title: 'Problem 367: Bozo sort'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-368-a-kempner-like-series.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-368-a-kempner-like-series.english.md
index fa759e824b..50e84dfad3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-368-a-kempner-like-series.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-368-a-kempner-like-series.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4dd1000cf542c50ffef
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 title: 'Problem 368: A Kempner-like series'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-369-badugi.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-369-badugi.english.md
index fbc9cc9293..f8be7a9deb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-369-badugi.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-369-badugi.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4de1000cf542c50fff0
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-37-truncatable-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-37-truncatable-primes.english.md
index 17496eee98..5d0923271a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-37-truncatable-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-37-truncatable-primes.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3911000cf542c50fea4
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-370-geometric-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-370-geometric-triangles.english.md
index d42a0dfe40..f510f1b646 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-370-geometric-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-370-geometric-triangles.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4de1000cf542c50fff1
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+isHidden: false
 title: 'Problem 370: Geometric triangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-371-licence-plates.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-371-licence-plates.english.md
index 740371541e..de571f638f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-371-licence-plates.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-371-licence-plates.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e01000cf542c50fff2
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 title: 'Problem 371: Licence plates'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-372-pencils-of-rays.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-372-pencils-of-rays.english.md
index f277716fd2..dd5ad1bd2c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-372-pencils-of-rays.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-372-pencils-of-rays.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e11000cf542c50fff3
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 title: 'Problem 372: Pencils of rays'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-373-circumscribed-circles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-373-circumscribed-circles.english.md
index 0249f5a35b..1874e16991 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-373-circumscribed-circles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-373-circumscribed-circles.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e11000cf542c50fff4
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-374-maximum-integer-partition-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-374-maximum-integer-partition-product.english.md
index 0c53257654..d689d4e38d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-374-maximum-integer-partition-product.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-374-maximum-integer-partition-product.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e51000cf542c50fff6
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-375-minimum-of-subsequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-375-minimum-of-subsequences.english.md
index e89ed225a2..8c2be5f9da 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-375-minimum-of-subsequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-375-minimum-of-subsequences.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e41000cf542c50fff5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-376-nontransitive-sets-of-dice.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-376-nontransitive-sets-of-dice.english.md
index 242541106b..5232a16e7e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-376-nontransitive-sets-of-dice.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-376-nontransitive-sets-of-dice.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e51000cf542c50fff7
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-377-sum-of-digits-experience-13.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-377-sum-of-digits-experience-13.english.md
index 2b953771fd..7d9def2672 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-377-sum-of-digits-experience-13.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-377-sum-of-digits-experience-13.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e51000cf542c50fff8
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-378-triangle-triples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-378-triangle-triples.english.md
index 162a14e60d..9ac8bdb6bc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-378-triangle-triples.english.md
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@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-379-least-common-multiple-count.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-379-least-common-multiple-count.english.md
index 665d7ab2b8..ac4e0cf302 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-379-least-common-multiple-count.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-379-least-common-multiple-count.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-38-pandigital-multiples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-38-pandigital-multiples.english.md
index 42d0b9678a..0d3a6dce1d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-38-pandigital-multiples.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-38-pandigital-multiples.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3931000cf542c50fea5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-380-amazing-mazes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-380-amazing-mazes.english.md
index e99808c331..f04c8121fc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-380-amazing-mazes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-380-amazing-mazes.english.md
@@ -1,6 +1,7 @@
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 id: 5900f4e81000cf542c50fffb
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 title: 'Problem 380: Amazing Mazes!'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-381-prime-k-factorial.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-381-prime-k-factorial.english.md
index f3b5f58d5d..af6e84a8b2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-381-prime-k-factorial.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-381-prime-k-factorial.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-382-generating-polygons.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-382-generating-polygons.english.md
index d3f9fe8130..2ed4103178 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-382-generating-polygons.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-382-generating-polygons.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4eb1000cf542c50fffd
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-383-divisibility-comparison-between-factorials.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-383-divisibility-comparison-between-factorials.english.md
index 26ee19013c..fa591db50c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-383-divisibility-comparison-between-factorials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-383-divisibility-comparison-between-factorials.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4ed1000cf542c50ffff
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-384-rudin-shapiro-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-384-rudin-shapiro-sequence.english.md
index d383e7c983..3fbf3453bd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-384-rudin-shapiro-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-384-rudin-shapiro-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4ed1000cf542c50fffe
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-385-ellipses-inside-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-385-ellipses-inside-triangles.english.md
index 1a5765fd76..c72c1e9ac3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-385-ellipses-inside-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-385-ellipses-inside-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4ee1000cf542c510000
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+isHidden: false
 title: 'Problem 385: Ellipses inside triangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-386-maximum-length-of-an-antichain.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-386-maximum-length-of-an-antichain.english.md
index bbf2620b61..c03d8a3670 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-386-maximum-length-of-an-antichain.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-386-maximum-length-of-an-antichain.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4ef1000cf542c510001
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-387-harshad-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-387-harshad-numbers.english.md
index 845740f1f2..30dfae4020 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-387-harshad-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-387-harshad-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f11000cf542c510003
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-388-distinct-lines.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-388-distinct-lines.english.md
index 5e01d0ec34..a8c0c79a42 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-388-distinct-lines.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-388-distinct-lines.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f11000cf542c510002
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-389-platonic-dice.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-389-platonic-dice.english.md
index 2695768517..1fca652d59 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-389-platonic-dice.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-389-platonic-dice.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f21000cf542c510004
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+isHidden: false
 title: 'Problem 389: Platonic Dice'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-39-integer-right-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-39-integer-right-triangles.english.md
index 50cc8e9928..4353a87902 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-39-integer-right-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-39-integer-right-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3931000cf542c50fea6
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+isHidden: false
 title: 'Problem 39: Integer right triangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-390-triangles-with-non-rational-sides-and-integral-area.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-390-triangles-with-non-rational-sides-and-integral-area.english.md
index eab3a5451e..56291ea247 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-390-triangles-with-non-rational-sides-and-integral-area.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-390-triangles-with-non-rational-sides-and-integral-area.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f21000cf542c510005
 challengeType: 5
+isHidden: false
 title: 'Problem 390: Triangles with non rational sides and integral area'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-391-hopping-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-391-hopping-game.english.md
index f935ec4e34..47cf3caaf8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-391-hopping-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-391-hopping-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f31000cf542c510006
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+isHidden: false
 title: 'Problem 391: Hopping Game'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-392-enmeshed-unit-circle.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-392-enmeshed-unit-circle.english.md
index 8c664f4593..a374a11b37 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-392-enmeshed-unit-circle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-392-enmeshed-unit-circle.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f41000cf542c510007
 challengeType: 5
+isHidden: false
 title: 'Problem 392: Enmeshed unit circle'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-393-migrating-ants.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-393-migrating-ants.english.md
index ac4c9987a7..0dc82b9b4f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-393-migrating-ants.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-393-migrating-ants.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f61000cf542c510008
 challengeType: 5
+isHidden: false
 title: 'Problem 393: Migrating ants'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-394-eating-pie.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-394-eating-pie.english.md
index 9f1c7b00e3..94479065c9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-394-eating-pie.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-394-eating-pie.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f71000cf542c510009
 challengeType: 5
+isHidden: false
 title: 'Problem 394: Eating pie'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-395-pythagorean-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-395-pythagorean-tree.english.md
index da46929ec8..c021a2bb58 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-395-pythagorean-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-395-pythagorean-tree.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f71000cf542c51000a
 challengeType: 5
+isHidden: false
 title: 'Problem 395: Pythagorean tree'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-396-weak-goodstein-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-396-weak-goodstein-sequence.english.md
index cd56850606..1a202492b0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-396-weak-goodstein-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-396-weak-goodstein-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f81000cf542c51000b
 challengeType: 5
+isHidden: false
 title: 'Problem 396: Weak Goodstein sequence'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-397-triangle-on-parabola.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-397-triangle-on-parabola.english.md
index 48f0f92f19..df3a373429 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-397-triangle-on-parabola.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-397-triangle-on-parabola.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4f91000cf542c51000c
 challengeType: 5
+isHidden: false
 title: 'Problem 397: Triangle on parabola'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-398-cutting-rope.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-398-cutting-rope.english.md
index abfd8b3fd5..c1eef91315 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-398-cutting-rope.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-398-cutting-rope.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4fa1000cf542c51000d
 challengeType: 5
+isHidden: false
 title: 'Problem 398: Cutting rope'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-399-squarefree-fibonacci-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-399-squarefree-fibonacci-numbers.english.md
index 75805ed8c1..56a2f543fb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-399-squarefree-fibonacci-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-399-squarefree-fibonacci-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4fc1000cf542c51000e
 challengeType: 5
+isHidden: false
 title: 'Problem 399: Squarefree Fibonacci Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-4-largest-palindrome-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-4-largest-palindrome-product.english.md
index 6b5925bc43..79dc93168b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-4-largest-palindrome-product.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-4-largest-palindrome-product.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3701000cf542c50fe83
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+isHidden: false
 title: 'Problem 4: Largest palindrome product'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-40-champernownes-constant.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-40-champernownes-constant.english.md
index 6867361144..7dcf61fa6e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-40-champernownes-constant.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-40-champernownes-constant.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3941000cf542c50fea7
 challengeType: 5
+isHidden: false
 title: 'Problem 40: Champernowne''s constant'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-400-fibonacci-tree-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-400-fibonacci-tree-game.english.md
index c928a91aba..3837ff8762 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-400-fibonacci-tree-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-400-fibonacci-tree-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4fe1000cf542c510010
 challengeType: 5
+isHidden: false
 title: 'Problem 400: Fibonacci tree game'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-401-sum-of-squares-of-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-401-sum-of-squares-of-divisors.english.md
index 2171aef142..cc2dcf3ae4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-401-sum-of-squares-of-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-401-sum-of-squares-of-divisors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4fd1000cf542c51000f
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+isHidden: false
 title: 'Problem 401: Sum of squares of divisors'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-402-integer-valued-polynomials.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-402-integer-valued-polynomials.english.md
index 3e8f882b50..42ef240e9a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-402-integer-valued-polynomials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-402-integer-valued-polynomials.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f4ff1000cf542c510011
 challengeType: 5
+isHidden: false
 title: 'Problem 402: Integer-valued polynomials'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-403-lattice-points-enclosed-by-parabola-and-line.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-403-lattice-points-enclosed-by-parabola-and-line.english.md
index 2edcd62abc..2abe473c13 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-403-lattice-points-enclosed-by-parabola-and-line.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-403-lattice-points-enclosed-by-parabola-and-line.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5001000cf542c510013
 challengeType: 5
+isHidden: false
 title: 'Problem 403: Lattice points enclosed by parabola and line'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-404-crisscross-ellipses.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-404-crisscross-ellipses.english.md
index 766e3f5bb4..c02c8225b3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-404-crisscross-ellipses.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-404-crisscross-ellipses.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5001000cf542c510012
 challengeType: 5
+isHidden: false
 title: 'Problem 404: Crisscross Ellipses'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-405-a-rectangular-tiling.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-405-a-rectangular-tiling.english.md
index 6a19ad40e0..5dc16979e1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-405-a-rectangular-tiling.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-405-a-rectangular-tiling.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5021000cf542c510014
 challengeType: 5
+isHidden: false
 title: 'Problem 405: A rectangular tiling'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-406-guessing-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-406-guessing-game.english.md
index 3fb291d899..98a727605e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-406-guessing-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-406-guessing-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5021000cf542c510015
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+isHidden: false
 title: 'Problem 406: Guessing Game'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-407-idempotents.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-407-idempotents.english.md
index d844b8e344..96678d4c15 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-407-idempotents.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-407-idempotents.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5041000cf542c510016
 challengeType: 5
+isHidden: false
 title: 'Problem 407: Idempotents'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-408-admissible-paths-through-a-grid.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-408-admissible-paths-through-a-grid.english.md
index 8a3dafcf5c..495c386ca3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-408-admissible-paths-through-a-grid.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-408-admissible-paths-through-a-grid.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5091000cf542c51001b
 challengeType: 5
+isHidden: false
 title: 'Problem 408: Admissible paths through a grid'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-409-nim-extreme.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-409-nim-extreme.english.md
index 9256e753a0..4c2c8ae8b8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-409-nim-extreme.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-409-nim-extreme.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5061000cf542c510017
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-41-pandigital-prime.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-41-pandigital-prime.english.md
index dc0172e0ff..68c5e65150 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-41-pandigital-prime.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-41-pandigital-prime.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3951000cf542c50fea8
 challengeType: 5
+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-410-circle-and-tangent-line.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-410-circle-and-tangent-line.english.md
index 8cd3edd560..c953f40d7d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-410-circle-and-tangent-line.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-410-circle-and-tangent-line.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5071000cf542c510018
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+isHidden: false
 title: 'Problem 410: Circle and tangent line'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-411-uphill-paths.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-411-uphill-paths.english.md
index 6ff13eff67..f389cf40f8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-411-uphill-paths.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-411-uphill-paths.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5081000cf542c510019
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-412-gnomon-numbering.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-412-gnomon-numbering.english.md
index 55cffd31b0..55b495b0d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-412-gnomon-numbering.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-412-gnomon-numbering.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5081000cf542c51001a
 challengeType: 5
+isHidden: false
 title: 'Problem 412: Gnomon numbering'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-413-one-child-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-413-one-child-numbers.english.md
index 0478691438..14e713d495 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-413-one-child-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-413-one-child-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50a1000cf542c51001c
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+isHidden: false
 title: 'Problem 413: One-child Numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-414-kaprekar-constant.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-414-kaprekar-constant.english.md
index 5c722b0cd5..fc627383cc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-414-kaprekar-constant.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-414-kaprekar-constant.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50b1000cf542c51001d
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+isHidden: false
 title: 'Problem 414: Kaprekar constant'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-415-titanic-sets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-415-titanic-sets.english.md
index b99280e7cd..a2f3e9ca66 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-415-titanic-sets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-415-titanic-sets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50c1000cf542c51001e
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+isHidden: false
 title: 'Problem 415: Titanic sets'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-416-a-frogs-trip.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-416-a-frogs-trip.english.md
index 34624b38d3..25102ec7ff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-416-a-frogs-trip.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-416-a-frogs-trip.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50e1000cf542c510020
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+isHidden: false
 title: 'Problem 416: A frog''s trip'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-417-reciprocal-cycles-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-417-reciprocal-cycles-ii.english.md
index c9373bdd56..79d0c088f0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-417-reciprocal-cycles-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-417-reciprocal-cycles-ii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50d1000cf542c51001f
 challengeType: 5
+isHidden: false
 title: 'Problem 417: Reciprocal cycles II'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-418-factorisation-triples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-418-factorisation-triples.english.md
index 674b0811f7..c96aa3e565 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-418-factorisation-triples.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-418-factorisation-triples.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f50f1000cf542c510021
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+isHidden: false
 title: 'Problem 418: Factorisation triples'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-419-look-and-say-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-419-look-and-say-sequence.english.md
index a6eb29edba..a4d5580c9b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-419-look-and-say-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-419-look-and-say-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5101000cf542c510022
 challengeType: 5
+isHidden: false
 title: 'Problem 419: Look and say sequence'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-42-coded-triangle-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-42-coded-triangle-numbers.english.md
index 09ae70cce1..1ecac81635 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-42-coded-triangle-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-42-coded-triangle-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3961000cf542c50fea9
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+isHidden: false
 title: 'Problem 42: Coded triangle numbers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-420-2x2-positive-integer-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-420-2x2-positive-integer-matrix.english.md
index e094b7df41..5771032444 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-420-2x2-positive-integer-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-420-2x2-positive-integer-matrix.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5111000cf542c510023
 challengeType: 5
+isHidden: false
 title: 'Problem 420: 2x2 positive integer matrix'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-421-prime-factors-of-n151.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-421-prime-factors-of-n151.english.md
index a0fca9b174..27fe840e1f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-421-prime-factors-of-n151.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-421-prime-factors-of-n151.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5131000cf542c510024
 challengeType: 5
+isHidden: false
 title: 'Problem 421: Prime factors of n15+1'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-422-sequence-of-points-on-a-hyperbola.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-422-sequence-of-points-on-a-hyperbola.english.md
index 5f50d69285..9c0c764cd5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-422-sequence-of-points-on-a-hyperbola.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-422-sequence-of-points-on-a-hyperbola.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5131000cf542c510025
 challengeType: 5
+isHidden: false
 title: 'Problem 422: Sequence of points on a hyperbola'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-423-consecutive-die-throws.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-423-consecutive-die-throws.english.md
index 94ed04a62c..943f7ac3fd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-423-consecutive-die-throws.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-423-consecutive-die-throws.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5141000cf542c510027
 challengeType: 5
+isHidden: false
 title: 'Problem 423: Consecutive die throws'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-424-kakuro.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-424-kakuro.english.md
index d574537070..f746a9a8d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-424-kakuro.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-424-kakuro.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5141000cf542c510026
 challengeType: 5
+isHidden: false
 title: 'Problem 424: Kakuro'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-425-prime-connection.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-425-prime-connection.english.md
index f0210f3661..598d71c6eb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-425-prime-connection.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-425-prime-connection.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5151000cf542c510028
 challengeType: 5
+isHidden: false
 title: 'Problem 425: Prime connection'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-426-box-ball-system.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-426-box-ball-system.english.md
index bdc7ffcba9..a765904b75 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-426-box-ball-system.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-426-box-ball-system.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5171000cf542c510029
 challengeType: 5
+isHidden: false
 title: 'Problem 426: Box-ball system'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-427-n-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-427-n-sequences.english.md
index 25e0c8c27e..0d8b050a8c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-427-n-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-427-n-sequences.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5181000cf542c51002a
 challengeType: 5
+isHidden: false
 title: 'Problem 427: n-sequences'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-428-necklace-of-circles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-428-necklace-of-circles.english.md
index c2c3038e51..cdebd52b5e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-428-necklace-of-circles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-428-necklace-of-circles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5191000cf542c51002b
 challengeType: 5
+isHidden: false
 title: 'Problem 428: Necklace of Circles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-429-sum-of-squares-of-unitary-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-429-sum-of-squares-of-unitary-divisors.english.md
index 597e1c3d4a..0a189ce187 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-429-sum-of-squares-of-unitary-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-429-sum-of-squares-of-unitary-divisors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5191000cf542c51002c
 challengeType: 5
+isHidden: false
 title: 'Problem 429: Sum of squares of unitary divisors'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-43-sub-string-divisibility.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-43-sub-string-divisibility.english.md
index 3afeca67e3..8c85825cf8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-43-sub-string-divisibility.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-43-sub-string-divisibility.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3971000cf542c50feaa
 challengeType: 5
+isHidden: false
 title: 'Problem 43: Sub-string divisibility'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-430-range-flips.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-430-range-flips.english.md
index 0dcd42a7ef..bc8d6114db 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-430-range-flips.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-430-range-flips.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f51a1000cf542c51002d
 challengeType: 5
+isHidden: false
 title: 'Problem 430: Range flips'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-431-square-space-silo.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-431-square-space-silo.english.md
index dda9aa66f3..3162663063 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-431-square-space-silo.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-431-square-space-silo.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f51b1000cf542c51002e
 challengeType: 5
+isHidden: false
 title: 'Problem 431: Square Space Silo'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-432-totient-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-432-totient-sum.english.md
index e99af2741f..459d59598b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-432-totient-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-432-totient-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f51e1000cf542c510030
 challengeType: 5
+isHidden: false
 title: 'Problem 432: Totient sum'
 forumTopicId: 302103
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-433-steps-in-euclids-algorithm.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-433-steps-in-euclids-algorithm.english.md
index b79599c624..9ed0b8d1dc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-433-steps-in-euclids-algorithm.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-433-steps-in-euclids-algorithm.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f51d1000cf542c51002f
 challengeType: 5
+isHidden: false
 title: 'Problem 433: Steps in Euclid''s algorithm'
 forumTopicId: 302104
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-434-rigid-graphs.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-434-rigid-graphs.english.md
index c5a28c2485..aff920c757 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-434-rigid-graphs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-434-rigid-graphs.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f51f1000cf542c510031
 challengeType: 5
+isHidden: false
 title: 'Problem 434: Rigid graphs'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-435-polynomials-of-fibonacci-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-435-polynomials-of-fibonacci-numbers.english.md
index 6c7fc2a94d..9c1afd3a49 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-435-polynomials-of-fibonacci-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-435-polynomials-of-fibonacci-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5201000cf542c510032
 challengeType: 5
+isHidden: false
 title: 'Problem 435: Polynomials of Fibonacci numbers'
 forumTopicId: 302106
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-436-unfair-wager.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-436-unfair-wager.english.md
index 06d910af0b..85ac6579ea 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-436-unfair-wager.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-436-unfair-wager.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5221000cf542c510033
 challengeType: 5
+isHidden: false
 title: 'Problem 436: Unfair wager'
 forumTopicId: 302107
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-437-fibonacci-primitive-roots.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-437-fibonacci-primitive-roots.english.md
index 7542e77353..e58e21ba88 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-437-fibonacci-primitive-roots.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-437-fibonacci-primitive-roots.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5241000cf542c510036
 challengeType: 5
+isHidden: false
 title: 'Problem 437: Fibonacci primitive roots'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-438-integer-part-of-polynomial-equations-solutions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-438-integer-part-of-polynomial-equations-solutions.english.md
index 1b870d1071..942b11c7fd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-438-integer-part-of-polynomial-equations-solutions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-438-integer-part-of-polynomial-equations-solutions.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5231000cf542c510034
 challengeType: 5
+isHidden: false
 title: 'Problem 438: Integer part of polynomial equation''s solutions'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-439-sum-of-sum-of-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-439-sum-of-sum-of-divisors.english.md
index d7b1b28897..be11864b8f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-439-sum-of-sum-of-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-439-sum-of-sum-of-divisors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5231000cf542c510035
 challengeType: 5
+isHidden: false
 title: 'Problem 439: Sum of sum of divisors'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-44-pentagon-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-44-pentagon-numbers.english.md
index b9b5d9ce3c..adcc032fd6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-44-pentagon-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-44-pentagon-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3981000cf542c50feab
 challengeType: 5
+isHidden: false
 title: 'Problem 44: Pentagon numbers'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-440-gcd-and-tiling.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-440-gcd-and-tiling.english.md
index 599586331e..c011980f32 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-440-gcd-and-tiling.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-440-gcd-and-tiling.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5241000cf542c510037
 challengeType: 5
+isHidden: false
 title: 'Problem 440: GCD and Tiling'
 forumTopicId: 302112
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-441-the-inverse-summation-of-coprime-couples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-441-the-inverse-summation-of-coprime-couples.english.md
index 06e205e19d..7eada1c366 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-441-the-inverse-summation-of-coprime-couples.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-441-the-inverse-summation-of-coprime-couples.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5261000cf542c510038
 challengeType: 5
+isHidden: false
 title: 'Problem 441: The inverse summation of coprime couples'
 forumTopicId: 302113
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-442-eleven-free-integers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-442-eleven-free-integers.english.md
index be18fd33be..b7673361fa 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-442-eleven-free-integers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-442-eleven-free-integers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5271000cf542c510039
 challengeType: 5
+isHidden: false
 title: 'Problem 442: Eleven-free integers'
 forumTopicId: 302114
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-443-gcd-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-443-gcd-sequence.english.md
index 66d041371f..3eb523ef76 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-443-gcd-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-443-gcd-sequence.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5271000cf542c51003a
 challengeType: 5
+isHidden: false
 title: 'Problem 443: GCD sequence'
 forumTopicId: 302115
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-444-the-roundtable-lottery.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-444-the-roundtable-lottery.english.md
index d1d805ce61..f56953d022 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-444-the-roundtable-lottery.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-444-the-roundtable-lottery.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52a1000cf542c51003b
 challengeType: 5
+isHidden: false
 title: 'Problem 444: The Roundtable Lottery'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-445-retractions-a.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-445-retractions-a.english.md
index fd250643bf..6f82c63d08 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-445-retractions-a.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-445-retractions-a.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52a1000cf542c51003c
 challengeType: 5
+isHidden: false
 title: 'Problem 445: Retractions A'
 forumTopicId: 302117
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-446-retractions-b.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-446-retractions-b.english.md
index 721b7d8463..96faefa9b3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-446-retractions-b.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-446-retractions-b.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52c1000cf542c51003d
 challengeType: 5
+isHidden: false
 title: 'Problem 446: Retractions B'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-447-retractions-c.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-447-retractions-c.english.md
index 80e34bb0d9..d6f1b43d72 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-447-retractions-c.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-447-retractions-c.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52c1000cf542c51003e
 challengeType: 5
+isHidden: false
 title: 'Problem 447: Retractions C'
 forumTopicId: 302119
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-448-average-least-common-multiple.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-448-average-least-common-multiple.english.md
index cd5d59f30d..2c04e1d3b9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-448-average-least-common-multiple.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-448-average-least-common-multiple.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52c1000cf542c51003f
 challengeType: 5
+isHidden: false
 title: 'Problem 448: Average least common multiple'
 forumTopicId: 302120
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-449-chocolate-covered-candy.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-449-chocolate-covered-candy.english.md
index 98b81e3a7a..66457974d0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-449-chocolate-covered-candy.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-449-chocolate-covered-candy.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52d1000cf542c510040
 challengeType: 5
+isHidden: false
 title: 'Problem 449: Chocolate covered candy'
 forumTopicId: 302121
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-45-triangular-pentagonal-and-hexagonal.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-45-triangular-pentagonal-and-hexagonal.english.md
index 9ef0e67cc1..d837e35d6e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-45-triangular-pentagonal-and-hexagonal.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-45-triangular-pentagonal-and-hexagonal.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3991000cf542c50feac
 challengeType: 5
+isHidden: false
 title: 'Problem 45: Triangular, pentagonal, and hexagonal'
 forumTopicId: 302122
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-450-hypocycloid-and-lattice-points.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-450-hypocycloid-and-lattice-points.english.md
index bab137c10d..142f762cec 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-450-hypocycloid-and-lattice-points.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-450-hypocycloid-and-lattice-points.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f52e1000cf542c510041
 challengeType: 5
+isHidden: false
 title: 'Problem 450: Hypocycloid and Lattice points'
 forumTopicId: 302123
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-451-modular-inverses.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-451-modular-inverses.english.md
index b01179b99a..ad967f9db0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-451-modular-inverses.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-451-modular-inverses.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5311000cf542c510042
 challengeType: 5
+isHidden: false
 title: 'Problem 451: Modular inverses'
 forumTopicId: 302124
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-452-long-products.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-452-long-products.english.md
index 1f45ba785c..9c567d3f01 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-452-long-products.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-452-long-products.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5311000cf542c510043
 challengeType: 5
+isHidden: false
 title: 'Problem 452: Long Products'
 forumTopicId: 302125
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-453-lattice-quadrilaterals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-453-lattice-quadrilaterals.english.md
index b1c15be44d..95f32f654d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-453-lattice-quadrilaterals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-453-lattice-quadrilaterals.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5311000cf542c510044
 challengeType: 5
+isHidden: false
 title: 'Problem 453: Lattice Quadrilaterals'
 forumTopicId: 302126
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-454-diophantine-reciprocals-iii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-454-diophantine-reciprocals-iii.english.md
index 5204969569..82dce93c4d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-454-diophantine-reciprocals-iii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-454-diophantine-reciprocals-iii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5331000cf542c510045
 challengeType: 5
+isHidden: false
 title: 'Problem 454: Diophantine reciprocals III'
 forumTopicId: 302127
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-455-powers-with-trailing-digits.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-455-powers-with-trailing-digits.english.md
index 9f4ca211d3..558bd7568c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-455-powers-with-trailing-digits.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-455-powers-with-trailing-digits.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5331000cf542c510046
 challengeType: 5
+isHidden: false
 title: 'Problem 455: Powers With Trailing Digits'
 forumTopicId: 302129
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-456-triangles-containing-the-origin-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-456-triangles-containing-the-origin-ii.english.md
index 1f837fe826..28a5e23d58 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-456-triangles-containing-the-origin-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-456-triangles-containing-the-origin-ii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5351000cf542c510047
 challengeType: 5
+isHidden: false
 title: 'Problem 456: Triangles containing the origin II'
 forumTopicId: 302130
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-457-a-polynomial-modulo-the-square-of-a-prime.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-457-a-polynomial-modulo-the-square-of-a-prime.english.md
index 21bb1f048f..b5d314534a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-457-a-polynomial-modulo-the-square-of-a-prime.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-457-a-polynomial-modulo-the-square-of-a-prime.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5361000cf542c510048
 challengeType: 5
+isHidden: false
 title: 'Problem 457: A polynomial modulo the square of a prime'
 forumTopicId: 302131
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-458-permutations-of-project.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-458-permutations-of-project.english.md
index 049b36174e..8022da29d7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-458-permutations-of-project.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-458-permutations-of-project.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5361000cf542c510049
 challengeType: 5
+isHidden: false
 title: 'Problem 458: Permutations of Project'
 forumTopicId: 302132
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-459-flipping-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-459-flipping-game.english.md
index f0a3112ed6..f13178cc5c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-459-flipping-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-459-flipping-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5371000cf542c51004a
 challengeType: 5
+isHidden: false
 title: 'Problem 459: Flipping game'
 forumTopicId: 302133
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-46-goldbachs-other-conjecture.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-46-goldbachs-other-conjecture.english.md
index f71eb8325f..343f16456c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-46-goldbachs-other-conjecture.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-46-goldbachs-other-conjecture.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f39a1000cf542c50fead
 challengeType: 5
+isHidden: false
 title: 'Problem 46: Goldbach''s other conjecture'
 forumTopicId: 302134
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-460-an-ant-on-the-move.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-460-an-ant-on-the-move.english.md
index c789f58bb8..493766bc06 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-460-an-ant-on-the-move.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-460-an-ant-on-the-move.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5381000cf542c51004b
 challengeType: 5
+isHidden: false
 title: 'Problem 460: An ant on the move'
 forumTopicId: 302135
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-461-almost-pi.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-461-almost-pi.english.md
index ad388f4a19..704959f70c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-461-almost-pi.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-461-almost-pi.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f53a1000cf542c51004c
 challengeType: 5
+isHidden: false
 title: 'Problem 461: Almost Pi'
 forumTopicId: 302136
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-462-permutation-of-3-smooth-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-462-permutation-of-3-smooth-numbers.english.md
index 702d11ccb4..2bd181238f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-462-permutation-of-3-smooth-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-462-permutation-of-3-smooth-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f53b1000cf542c51004d
 challengeType: 5
+isHidden: false
 title: 'Problem 462: Permutation of 3-smooth numbers'
 forumTopicId: 302137
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-463-a-weird-recurrence-relation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-463-a-weird-recurrence-relation.english.md
index f5c52b553c..98de68f6ca 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-463-a-weird-recurrence-relation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-463-a-weird-recurrence-relation.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f53c1000cf542c51004e
 challengeType: 5
+isHidden: false
 title: 'Problem 463: A weird recurrence relation'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-464-mbius-function-and-intervals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-464-mbius-function-and-intervals.english.md
index de0972dcda..d9b0f1d2cd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-464-mbius-function-and-intervals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-464-mbius-function-and-intervals.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-465-polar-polygons.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-465-polar-polygons.english.md
index 8037e5ec9a..340f99fbd0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-465-polar-polygons.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-465-polar-polygons.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-466-distinct-terms-in-a-multiplication-table.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-466-distinct-terms-in-a-multiplication-table.english.md
index 1c129e5f1e..303a62cabf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-466-distinct-terms-in-a-multiplication-table.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-466-distinct-terms-in-a-multiplication-table.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f53e1000cf542c510051
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-467-superinteger.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-467-superinteger.english.md
index 3735ee60a2..8061a72672 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-467-superinteger.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-467-superinteger.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5411000cf542c510052
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-468-smooth-divisors-of-binomial-coefficients.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-468-smooth-divisors-of-binomial-coefficients.english.md
index 7b6ec3fa51..b37b8a65c5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-468-smooth-divisors-of-binomial-coefficients.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-468-smooth-divisors-of-binomial-coefficients.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5411000cf542c510054
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-469-empty-chairs.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-469-empty-chairs.english.md
index c4e1328f53..39c6d4694f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-469-empty-chairs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-469-empty-chairs.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5411000cf542c510053
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-47-distinct-primes-factors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-47-distinct-primes-factors.english.md
index 0aef92617f..2860b7cb81 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-47-distinct-primes-factors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-47-distinct-primes-factors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f39c1000cf542c50feae
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-470-super-ramvok.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-470-super-ramvok.english.md
index 61ece6e756..f5afa02c45 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-470-super-ramvok.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-470-super-ramvok.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5431000cf542c510055
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-471-triangle-inscribed-in-ellipse.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-471-triangle-inscribed-in-ellipse.english.md
index 3f6253e652..8e9e9bdf76 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-471-triangle-inscribed-in-ellipse.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-471-triangle-inscribed-in-ellipse.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5431000cf542c510056
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+isHidden: false
 title: 'Problem 471: Triangle inscribed in ellipse'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-472-comfortable-distance-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-472-comfortable-distance-ii.english.md
index b7c558dc83..9c2ee61b63 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-472-comfortable-distance-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-472-comfortable-distance-ii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5451000cf542c510057
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-473-phigital-number-base.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-473-phigital-number-base.english.md
index 693b3a11c7..5b8e0379e8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-473-phigital-number-base.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-473-phigital-number-base.english.md
@@ -1,6 +1,7 @@
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 id: 5900f5461000cf542c510058
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-474-last-digits-of-divisors.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-474-last-digits-of-divisors.english.md
index 1cf9cdca90..2a6dd1e805 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-474-last-digits-of-divisors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-474-last-digits-of-divisors.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5471000cf542c510059
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+isHidden: false
 title: 'Problem 474: Last digits of divisors'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-475-music-festival.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-475-music-festival.english.md
index 33784744cd..7f5db6848e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-475-music-festival.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-475-music-festival.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5481000cf542c51005a
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+isHidden: false
 title: 'Problem 475: Music festival'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-476-circle-packing-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-476-circle-packing-ii.english.md
index 4b8725f005..d9fb2371b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-476-circle-packing-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-476-circle-packing-ii.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f5481000cf542c51005b
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+isHidden: false
 title: 'Problem 476: Circle Packing II'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-477-number-sequence-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-477-number-sequence-game.english.md
index bcd9fe8721..a30c08ced3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-477-number-sequence-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-477-number-sequence-game.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f54a1000cf542c51005c
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+isHidden: false
 title: 'Problem 477: Number Sequence Game'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-478-mixtures.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-478-mixtures.english.md
index e1423af8dd..8002cf9651 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-478-mixtures.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-478-mixtures.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f54c1000cf542c51005e
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+isHidden: false
 title: 'Problem 478: Mixtures'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-479-roots-on-the-rise.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-479-roots-on-the-rise.english.md
index 37cc853907..b1a5402fc5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-479-roots-on-the-rise.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-479-roots-on-the-rise.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f54b1000cf542c51005d
 challengeType: 5
+isHidden: false
 title: 'Problem 479: Roots on the Rise'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-48-self-powers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-48-self-powers.english.md
index e05824bdbf..34c4496719 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-48-self-powers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-48-self-powers.english.md
@@ -1,6 +1,7 @@
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 id: 5900f39c1000cf542c50feaf
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+isHidden: false
 title: 'Problem 48: Self powers'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-480-the-last-question.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-480-the-last-question.english.md
index 17a94756a2..cb3a49464d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-480-the-last-question.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-480-the-last-question.english.md
@@ -1,6 +1,7 @@
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 id: 5900f54c1000cf542c51005f
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+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-49-prime-permutations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-49-prime-permutations.english.md
index f881572e69..a9656b8c37 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-49-prime-permutations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-49-prime-permutations.english.md
@@ -1,6 +1,7 @@
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 id: 5900f39d1000cf542c50feb0
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-5-smallest-multiple.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-5-smallest-multiple.english.md
index 08312be1a5..894202abf3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-5-smallest-multiple.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-5-smallest-multiple.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3711000cf542c50fe84
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-50-consecutive-prime-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-50-consecutive-prime-sum.english.md
index 0cc8abb627..a859e0c7ef 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-50-consecutive-prime-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-50-consecutive-prime-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f39e1000cf542c50feb1
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 title: 'Problem 50: Consecutive prime sum'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-51-prime-digit-replacements.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-51-prime-digit-replacements.english.md
index 506b6cc667..fc8bebbe29 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-51-prime-digit-replacements.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-51-prime-digit-replacements.english.md
@@ -1,6 +1,7 @@
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 id: 5900f39f1000cf542c50feb2
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-52-permuted-multiples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-52-permuted-multiples.english.md
index ef6b8cf05b..7a83ece469 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-52-permuted-multiples.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-52-permuted-multiples.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3a01000cf542c50feb3
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+isHidden: false
 title: 'Problem 52: Permuted multiples'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-53-combinatoric-selections.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-53-combinatoric-selections.english.md
index 9d9419f697..0e53e59caa 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-53-combinatoric-selections.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-53-combinatoric-selections.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3a11000cf542c50feb4
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+isHidden: false
 title: 'Problem 53: Combinatoric selections'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-54-poker-hands.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-54-poker-hands.english.md
index dc5723d607..b6c96f3dc5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-54-poker-hands.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-54-poker-hands.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3a21000cf542c50feb5
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+isHidden: false
 title: 'Problem 54: Poker hands'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-55-lychrel-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-55-lychrel-numbers.english.md
index 80959f7ae8..8efb33be74 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-55-lychrel-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-55-lychrel-numbers.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3a31000cf542c50feb6
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-56-powerful-digit-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-56-powerful-digit-sum.english.md
index efd726a93b..14c9f5f620 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-56-powerful-digit-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-56-powerful-digit-sum.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3a41000cf542c50feb7
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-57-square-root-convergents.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-57-square-root-convergents.english.md
index 71c218d7c7..e35a3d70e2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-57-square-root-convergents.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-57-square-root-convergents.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3a51000cf542c50feb8
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-58-spiral-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-58-spiral-primes.english.md
index 27ea3247e5..31ff019ed8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-58-spiral-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-58-spiral-primes.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3a61000cf542c50feb9
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-59-xor-decryption.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-59-xor-decryption.english.md
index 68f6ebfc70..4b9fa45dcc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-59-xor-decryption.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-59-xor-decryption.english.md
@@ -1,6 +1,7 @@
 ---
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-6-sum-square-difference.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-6-sum-square-difference.english.md
index a0beae6a33..8a6ba04ccd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-6-sum-square-difference.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-6-sum-square-difference.english.md
@@ -1,6 +1,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-60-prime-pair-sets.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-60-prime-pair-sets.english.md
index 16864a0b87..480dacf495 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-60-prime-pair-sets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-60-prime-pair-sets.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3a81000cf542c50febb
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-61-cyclical-figurate-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-61-cyclical-figurate-numbers.english.md
index 9eb664bb84..29e68bf9bb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-61-cyclical-figurate-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-61-cyclical-figurate-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3a91000cf542c50febc
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-62-cubic-permutations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-62-cubic-permutations.english.md
index 4283eb90a9..bbbe003822 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-62-cubic-permutations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-62-cubic-permutations.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3aa1000cf542c50febd
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-63-powerful-digit-counts.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-63-powerful-digit-counts.english.md
index de156ee3ef..268f2630bc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-63-powerful-digit-counts.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-63-powerful-digit-counts.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ab1000cf542c50febe
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-64-odd-period-square-roots.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-64-odd-period-square-roots.english.md
index 92673bfa9c..f6c81d5b1a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-64-odd-period-square-roots.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-64-odd-period-square-roots.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ac1000cf542c50febf
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-65-convergents-of-e.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-65-convergents-of-e.english.md
index b4a8e3d901..dcd3a64fa3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-65-convergents-of-e.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-65-convergents-of-e.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ad1000cf542c50fec0
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-66-diophantine-equation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-66-diophantine-equation.english.md
index 23f26624b6..725466fbd8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-66-diophantine-equation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-66-diophantine-equation.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3ae1000cf542c50fec1
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-67-maximum-path-sum-ii.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-67-maximum-path-sum-ii.english.md
index cdfdc39d7d..3baf621962 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-67-maximum-path-sum-ii.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-67-maximum-path-sum-ii.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b01000cf542c50fec2
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-68-magic-5-gon-ring.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-68-magic-5-gon-ring.english.md
index d4cc7afb83..794f348eb6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-68-magic-5-gon-ring.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-68-magic-5-gon-ring.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b01000cf542c50fec3
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-69-totient-maximum.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-69-totient-maximum.english.md
index cba0e95273..82e26c0c9b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-69-totient-maximum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-69-totient-maximum.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b11000cf542c50fec4
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-7-10001st-prime.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-7-10001st-prime.english.md
index 7af9b94ce8..e2999aa010 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-7-10001st-prime.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-7-10001st-prime.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3731000cf542c50fe86
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-70-totient-permutation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-70-totient-permutation.english.md
index 3af0c008c7..1be7b872e3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-70-totient-permutation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-70-totient-permutation.english.md
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 id: 5900f3b21000cf542c50fec5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-71-ordered-fractions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-71-ordered-fractions.english.md
index 231758224f..2145207f45 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-71-ordered-fractions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-71-ordered-fractions.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b31000cf542c50fec6
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-72-counting-fractions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-72-counting-fractions.english.md
index c8e1df6c61..4563b38203 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-72-counting-fractions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-72-counting-fractions.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b41000cf542c50fec7
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 title: 'Problem 72: Counting fractions'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-73-counting-fractions-in-a-range.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-73-counting-fractions-in-a-range.english.md
index fa667257ea..807848b1a2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-73-counting-fractions-in-a-range.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-73-counting-fractions-in-a-range.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b61000cf542c50fec8
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 title: 'Problem 73: Counting fractions in a range'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-74-digit-factorial-chains.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-74-digit-factorial-chains.english.md
index 541df6f962..f5cda22863 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-74-digit-factorial-chains.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-74-digit-factorial-chains.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b61000cf542c50fec9
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 title: 'Problem 74: Digit factorial chains'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-75-singular-integer-right-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-75-singular-integer-right-triangles.english.md
index 821ac93a08..3ff430400c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-75-singular-integer-right-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-75-singular-integer-right-triangles.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b71000cf542c50feca
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+isHidden: false
 title: 'Problem 75: Singular integer right triangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-76-counting-summations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-76-counting-summations.english.md
index 02998670c7..164df4369a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-76-counting-summations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-76-counting-summations.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b81000cf542c50fecb
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+isHidden: false
 title: 'Problem 76: Counting summations'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-77-prime-summations.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-77-prime-summations.english.md
index 932b450087..60c770f1d4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-77-prime-summations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-77-prime-summations.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3b91000cf542c50fecc
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 title: 'Problem 77: Prime summations'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-78-coin-partitions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-78-coin-partitions.english.md
index 2b8f01e9c8..932f5f0569 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-78-coin-partitions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-78-coin-partitions.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3ba1000cf542c50fecd
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+isHidden: false
 title: 'Problem 78: Coin partitions'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-79-passcode-derivation.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-79-passcode-derivation.english.md
index 504ae5740d..dbb92cb728 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-79-passcode-derivation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-79-passcode-derivation.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3bb1000cf542c50fece
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-8-largest-product-in-a-series.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-8-largest-product-in-a-series.english.md
index 4774d4f404..b671341a29 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-8-largest-product-in-a-series.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-8-largest-product-in-a-series.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3741000cf542c50fe87
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 title: 'Problem 8: Largest product in a series'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-80-square-root-digital-expansion.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-80-square-root-digital-expansion.english.md
index 29213d6baa..689e6317df 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-80-square-root-digital-expansion.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-80-square-root-digital-expansion.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3bc1000cf542c50fecf
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+isHidden: false
 title: 'Problem 80: Square root digital expansion'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-81-path-sum-two-ways.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-81-path-sum-two-ways.english.md
index 4668fa61bb..451736fbda 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-81-path-sum-two-ways.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-81-path-sum-two-ways.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3bd1000cf542c50fed0
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+isHidden: false
 title: 'Problem 81: Path sum: two ways'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-82-path-sum-three-ways.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-82-path-sum-three-ways.english.md
index 81e98a1c76..2de8792fc7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-82-path-sum-three-ways.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-82-path-sum-three-ways.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3be1000cf542c50fed1
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 title: 'Problem 82: Path sum: three ways'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-83-path-sum-four-ways.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-83-path-sum-four-ways.english.md
index c0233ad266..275998a129 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-83-path-sum-four-ways.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-83-path-sum-four-ways.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3bf1000cf542c50fed2
 challengeType: 5
+isHidden: false
 title: 'Problem 83: Path sum: four ways'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-84-monopoly-odds.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-84-monopoly-odds.english.md
index 253d44e2fb..3126fb5c03 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-84-monopoly-odds.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-84-monopoly-odds.english.md
@@ -1,6 +1,7 @@
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 id: 5900f3c11000cf542c50fed3
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+isHidden: false
 title: 'Problem 84: Monopoly odds'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-85-counting-rectangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-85-counting-rectangles.english.md
index fa865c5c2d..a0b5759a30 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-85-counting-rectangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-85-counting-rectangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c11000cf542c50fed4
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 title: 'Problem 85: Counting rectangles'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-86-cuboid-route.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-86-cuboid-route.english.md
index 02f963b331..c4e2ff8510 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-86-cuboid-route.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-86-cuboid-route.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c31000cf542c50fed5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-87-prime-power-triples.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-87-prime-power-triples.english.md
index 3cd4355e3d..3c99318657 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-87-prime-power-triples.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-87-prime-power-triples.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c51000cf542c50fed8
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+isHidden: false
 title: 'Problem 87: Prime power triples'
 forumTopicId: 302201
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-88-product-sum-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-88-product-sum-numbers.english.md
index b9e7cfa883..0650742ab9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-88-product-sum-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-88-product-sum-numbers.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c51000cf542c50fed6
 challengeType: 5
+isHidden: false
 title: 'Problem 88: Product-sum numbers'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-89-roman-numerals.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-89-roman-numerals.english.md
index 21861f85bc..d41f787ccc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-89-roman-numerals.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-89-roman-numerals.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c51000cf542c50fed7
 challengeType: 5
+isHidden: false
 title: 'Problem 89: Roman numerals'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-9-special-pythagorean-triplet.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-9-special-pythagorean-triplet.english.md
index d5da0fa3e6..b6a167d1dc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-9-special-pythagorean-triplet.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-9-special-pythagorean-triplet.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3761000cf542c50fe88
 challengeType: 5
+isHidden: false
 title: 'Problem 9: Special Pythagorean triplet'
 forumTopicId: 302205
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-90-cube-digit-pairs.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-90-cube-digit-pairs.english.md
index 70d46f992f..2d68b5bf33 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-90-cube-digit-pairs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-90-cube-digit-pairs.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c61000cf542c50fed9
 challengeType: 5
+isHidden: false
 title: 'Problem 90: Cube digit pairs'
 forumTopicId: 302207
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-91-right-triangles-with-integer-coordinates.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-91-right-triangles-with-integer-coordinates.english.md
index 6f189cd957..ab79a36759 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-91-right-triangles-with-integer-coordinates.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-91-right-triangles-with-integer-coordinates.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c71000cf542c50feda
 challengeType: 5
+isHidden: false
 title: 'Problem 91: Right triangles with integer coordinates'
 forumTopicId: 302208
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-92-square-digit-chains.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-92-square-digit-chains.english.md
index 1f13e0baf5..1b4b8866a6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-92-square-digit-chains.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-92-square-digit-chains.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3c81000cf542c50fedb
 challengeType: 5
+isHidden: false
 title: 'Problem 92: Square digit chains'
 forumTopicId: 302209
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-93-arithmetic-expressions.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-93-arithmetic-expressions.english.md
index 25d4ff6f54..c3744d5157 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-93-arithmetic-expressions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-93-arithmetic-expressions.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ca1000cf542c50fedc
 challengeType: 5
+isHidden: false
 title: 'Problem 93: Arithmetic expressions'
 forumTopicId: 302210
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-94-almost-equilateral-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-94-almost-equilateral-triangles.english.md
index eed036df98..02980d0924 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-94-almost-equilateral-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-94-almost-equilateral-triangles.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ca1000cf542c50fedd
 challengeType: 5
+isHidden: false
 title: 'Problem 94: Almost equilateral triangles'
 forumTopicId: 302211
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-95-amicable-chains.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-95-amicable-chains.english.md
index 33329c98c4..b9237e5b72 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-95-amicable-chains.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-95-amicable-chains.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3cc1000cf542c50fede
 challengeType: 5
+isHidden: false
 title: 'Problem 95: Amicable chains'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-96-su-doku.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-96-su-doku.english.md
index 70c94d8d11..8e99600950 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-96-su-doku.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-96-su-doku.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3cc1000cf542c50fedf
 challengeType: 5
+isHidden: false
 title: 'Problem 96: Su Doku'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-97-large-non-mersenne-prime.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-97-large-non-mersenne-prime.english.md
index 32538d3057..ca32501bcd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-97-large-non-mersenne-prime.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-97-large-non-mersenne-prime.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3ce1000cf542c50fee0
 challengeType: 5
+isHidden: false
 title: 'Problem 97: Large non-Mersenne prime'
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-98-anagramic-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-98-anagramic-squares.english.md
index 4de09c5a0d..25d716dc90 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-98-anagramic-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-98-anagramic-squares.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3cf1000cf542c50fee1
 challengeType: 5
+isHidden: false
 title: 'Problem 98: Anagramic squares'
 forumTopicId: 302215
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-99-largest-exponential.english.md b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-99-largest-exponential.english.md
index c13d973236..e25420c4cc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-99-largest-exponential.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-99-largest-exponential.english.md
@@ -1,6 +1,7 @@
 ---
 id: 5900f3d01000cf542c50fee2
 challengeType: 5
+isHidden: false
 title: 'Problem 99: Largest exponential'
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/100-doors.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/100-doors.english.md
index 802856060d..27bfeacb56 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/100-doors.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/100-doors.english.md
@@ -2,6 +2,7 @@
 title: 100 doors
 id: 594810f028c0303b75339acb
 challengeType: 5
+isHidden: false
 forumTopicId: 302217
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/24-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/24-game.english.md
index 68d4b12b4d..a0aabe5e1c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/24-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/24-game.english.md
@@ -2,6 +2,7 @@
 title: 24 game
 id: 5951e88f64ebf159166a1176
 challengeType: 5
+isHidden: false
 forumTopicId: 302218
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/9-billion-names-of-god-the-integer.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/9-billion-names-of-god-the-integer.english.md
index 7c23d5b007..ef10338770 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/9-billion-names-of-god-the-integer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/9-billion-names-of-god-the-integer.english.md
@@ -2,6 +2,7 @@
 title: 9 billion names of God the integer
 id: 5949b579404977fbaefcd736
 challengeType: 5
+isHidden: false
 forumTopicId: 302219
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abc-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abc-problem.english.md
index b0e0ec6618..ba9047b9d4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abc-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abc-problem.english.md
@@ -2,6 +2,7 @@
 title: ABC Problem
 id: 594810f028c0303b75339acc
 challengeType: 5
+isHidden: false
 forumTopicId: 302220
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abundant-deficient-and-perfect-number-classifications.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abundant-deficient-and-perfect-number-classifications.english.md
index 8ca3ed62db..2128e81295 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abundant-deficient-and-perfect-number-classifications.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/abundant-deficient-and-perfect-number-classifications.english.md
@@ -2,6 +2,7 @@
 title: 'Abundant, deficient and perfect number classifications'
 id: 594810f028c0303b75339acd
 challengeType: 5
+isHidden: false
 forumTopicId: 302221
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/accumulator-factory.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/accumulator-factory.english.md
index 10ae169e1c..ab647a93b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/accumulator-factory.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/accumulator-factory.english.md
@@ -2,6 +2,7 @@
 title: Accumulator factory
 id: 594810f028c0303b75339ace
 challengeType: 5
+isHidden: false
 forumTopicId: 302222
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ackermann-function.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ackermann-function.english.md
index 66a434ab60..e505bd364c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ackermann-function.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ackermann-function.english.md
@@ -2,6 +2,7 @@
 title: Ackermann function
 id: 594810f028c0303b75339acf
 challengeType: 5
+isHidden: false
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/align-columns.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/align-columns.english.md
index 4e9524e6cd..40958eca65 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/align-columns.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/align-columns.english.md
@@ -2,6 +2,7 @@
 title: Align columns
 id: 594810f028c0303b75339ad0
 challengeType: 5
+isHidden: false
 forumTopicId: 302224
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/amicable-pairs.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/amicable-pairs.english.md
index 477bbf721f..32ae787ecd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/amicable-pairs.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/amicable-pairs.english.md
@@ -2,6 +2,7 @@
 title: Amicable pairs
 id: 5949b579404977fbaefcd737
 challengeType: 5
+isHidden: false
 forumTopicId: 302225
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-mode.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-mode.english.md
index 51bcaadcdc..f7db7d0dd2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-mode.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-mode.english.md
@@ -2,6 +2,7 @@
 title: Averages/Mode
 id: 594d8d0ab97724821379b1e6
 challengeType: 5
+isHidden: false
 forumTopicId: 302226
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-pythagorean-means.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-pythagorean-means.english.md
index e549aa4243..08bbc0d3ea 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-pythagorean-means.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-pythagorean-means.english.md
@@ -2,6 +2,7 @@
 title: Averages/Pythagorean means
 id: 594d966a1467eb84194f0086
 challengeType: 5
+isHidden: false
 forumTopicId: 302227
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-root-mean-square.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-root-mean-square.english.md
index c6ddc57a5e..1f14bb7d2f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-root-mean-square.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/averages-root-mean-square.english.md
@@ -2,6 +2,7 @@
 title: Averages/Root mean square
 id: 594da033de4190850b893874
 challengeType: 5
+isHidden: false
 forumTopicId: 302228
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/babbage-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/babbage-problem.english.md
index 235d639f6f..944e188daf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/babbage-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/babbage-problem.english.md
@@ -2,6 +2,7 @@
 title: Babbage problem
 id: 594db4d0dedb4c06a2a4cefd
 challengeType: 5
+isHidden: false
 forumTopicId: 302229
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/balanced-brackets.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/balanced-brackets.english.md
index 930e9582d0..3eea84e600 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/balanced-brackets.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/balanced-brackets.english.md
@@ -2,6 +2,7 @@
 title: Balanced brackets
 id: 594dc6c729e5700999302b45
 challengeType: 5
+isHidden: false
 forumTopicId: 302230
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/circles-of-given-radius-through-two-points.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/circles-of-given-radius-through-two-points.english.md
index 6dfbee153f..fc77304706 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/circles-of-given-radius-through-two-points.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/circles-of-given-radius-through-two-points.english.md
@@ -2,6 +2,7 @@
 title: Circles of given radius through two points
 id: 5951815dd895584b06884620
 challengeType: 5
+isHidden: false
 forumTopicId: 302231
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/closest-pair-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/closest-pair-problem.english.md
index c148787193..d0bda9a0e2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/closest-pair-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/closest-pair-problem.english.md
@@ -2,6 +2,7 @@
 title: Closest-pair problem
 id: 5951a53863c8a34f02bf1bdc
 challengeType: 5
+isHidden: false
 forumTopicId: 302232
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/combinations.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/combinations.english.md
index fd011a1121..042ea9bf4a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/combinations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/combinations.english.md
@@ -2,6 +2,7 @@
 title: Combinations
 id: 5958469238c0d8d2632f46db
 challengeType: 5
+isHidden: false
 forumTopicId: 302233
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/comma-quibbling.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/comma-quibbling.english.md
index 4ba06d0ac1..31ea57a8f9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/comma-quibbling.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/comma-quibbling.english.md
@@ -2,6 +2,7 @@
 title: Comma quibbling
 id: 596e414344c3b2872167f0fe
 challengeType: 5
+isHidden: false
 forumTopicId: 302234
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/compare-a-list-of-strings.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/compare-a-list-of-strings.english.md
index d07f103ee8..ea9b0ff068 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/compare-a-list-of-strings.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/compare-a-list-of-strings.english.md
@@ -2,6 +2,7 @@
 title: Compare a list of strings
 id: 596e457071c35c882915b3e4
 challengeType: 5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/convert-seconds-to-compound-duration.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/convert-seconds-to-compound-duration.english.md
index 7787972dcd..44f871d699 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/convert-seconds-to-compound-duration.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/convert-seconds-to-compound-duration.english.md
@@ -2,6 +2,7 @@
 title: Convert seconds to compound duration
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-occurrences-of-a-substring.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-occurrences-of-a-substring.english.md
index abc72eeb3d..637cbdfaf2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-occurrences-of-a-substring.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-occurrences-of-a-substring.english.md
@@ -2,6 +2,7 @@
 title: Count occurrences of a substring
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-the-coins.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-the-coins.english.md
index 1295f90013..d15b904cd8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-the-coins.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/count-the-coins.english.md
@@ -2,6 +2,7 @@
 title: Count the coins
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cramers-rule.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cramers-rule.english.md
index b0df0959b4..6c91b77e43 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cramers-rule.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cramers-rule.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cumulative-standard-deviation.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cumulative-standard-deviation.english.md
index aee7abd883..1ef7a94ed9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cumulative-standard-deviation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cumulative-standard-deviation.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cusip.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cusip.english.md
index 30cb2ea4c5..7950d3fa51 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cusip.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cusip.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cut-a-rectangle.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cut-a-rectangle.english.md
index 0a5e447c63..d7700a4c6f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cut-a-rectangle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/cut-a-rectangle.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-format.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-format.english.md
index 81676034ee..1526587118 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-format.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-format.english.md
@@ -2,6 +2,7 @@
 title: Date format
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-manipulation.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-manipulation.english.md
index 450bc90de5..c7acc26cda 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-manipulation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/date-manipulation.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/day-of-the-week.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/day-of-the-week.english.md
index 13dd0e09a9..a99b5f0648 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/day-of-the-week.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/day-of-the-week.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deal-cards-for-freecell.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deal-cards-for-freecell.english.md
index 627d4e701b..40af50d5fe 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deal-cards-for-freecell.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deal-cards-for-freecell.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deepcopy.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deepcopy.english.md
index d6391acf60..da1ca639e1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deepcopy.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/deepcopy.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/define-a-primitive-data-type.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/define-a-primitive-data-type.english.md
index 49d341c237..b40eb26b5b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/define-a-primitive-data-type.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/define-a-primitive-data-type.english.md
@@ -2,6 +2,7 @@
 title: Define a primitive data type
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/department-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/department-numbers.english.md
index e1f4f33f9f..4f8843f307 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/department-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/department-numbers.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/discordian-date.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/discordian-date.english.md
index be5671b52e..a3804605d7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/discordian-date.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/discordian-date.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/dot-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/dot-product.english.md
index ee5e7ea271..1f42fa5788 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/dot-product.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/dot-product.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/element-wise-operations.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/element-wise-operations.english.md
index 294d926745..01665cb101 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/element-wise-operations.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/element-wise-operations.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/emirp-primes.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/emirp-primes.english.md
index 0970348726..82cf717b09 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/emirp-primes.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/emirp-primes.english.md
@@ -2,6 +2,7 @@
 title: Emirp primes
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/entropy.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/entropy.english.md
index 73a57f1443..9a49b1b34d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/entropy.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/entropy.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/equilibrium-index.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/equilibrium-index.english.md
index c5498a3674..9e1afb924f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/equilibrium-index.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/equilibrium-index.english.md
@@ -2,6 +2,7 @@
 title: Equilibrium index
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ethiopian-multiplication.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ethiopian-multiplication.english.md
index 8c5402a224..a31a9c08b0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ethiopian-multiplication.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ethiopian-multiplication.english.md
@@ -2,6 +2,7 @@
 title: Ethiopian multiplication
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/euler-method.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/euler-method.english.md
index 68e89381ba..5775be43d6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/euler-method.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/euler-method.english.md
@@ -2,6 +2,7 @@
 title: Euler method
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/evaluate-binomial-coefficients.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/evaluate-binomial-coefficients.english.md
index 89ccda34d1..abb1b68ee6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/evaluate-binomial-coefficients.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/evaluate-binomial-coefficients.english.md
@@ -2,6 +2,7 @@
 title: Evaluate binomial coefficients
 id: 598de241872ef8353c58a7a2
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-a-markov-algorithm.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-a-markov-algorithm.english.md
index 5efd54825f..d921124e26 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-a-markov-algorithm.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-a-markov-algorithm.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-brain.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-brain.english.md
index c1c163c85c..791f32317f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-brain.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/execute-brain.english.md
@@ -2,6 +2,7 @@
 title: Execute Brain****
 id: 59e0a8df964e4540d5abe599
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/extensible-prime-generator.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/extensible-prime-generator.english.md
index 626fb7ba1a..ef7d768927 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/extensible-prime-generator.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/extensible-prime-generator.english.md
@@ -2,6 +2,7 @@
 title: Extensible prime generator
 id: 598ee8b91b410510ae82efef
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factorial.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factorial.english.md
index b3c76c2cf0..9aceb6c949 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factorial.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factorial.english.md
@@ -2,6 +2,7 @@
 title: Factorial
 id: 597b2b2a2702b44414742771
 challengeType: 5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-a-mersenne-number.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-a-mersenne-number.english.md
index 5e0f00e6e8..98657a4d49 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-a-mersenne-number.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-a-mersenne-number.english.md
@@ -2,6 +2,7 @@
 title: Factors of a Mersenne number
 id: 598eea87e5cf4b116c3ff81a
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-an-integer.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-an-integer.english.md
index dfc9da76fa..d743b8e895 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-an-integer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/factors-of-an-integer.english.md
@@ -2,6 +2,7 @@
 title: Factors of an integer
 id: 597f1e7fbc206f0e9ba95dc4
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/farey-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/farey-sequence.english.md
index d6c0c0f894..3a54ece55e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/farey-sequence.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-n-step-number-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-n-step-number-sequences.english.md
index 1b1c4c3090..dde088bf2a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-n-step-number-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-n-step-number-sequences.english.md
@@ -2,6 +2,7 @@
 title: Fibonacci n-step number sequences
 id: 598eef80ba501f1268170e1e
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-sequence.english.md
index 21978596cb..7497abbe96 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-sequence.english.md
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 title: Fibonacci sequence
 id: 597f24c1dda4e70f53c79c81
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-word.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-word.english.md
index 924d87dbb0..ddd5745dc4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fibonacci-word.english.md
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fizzbuzz.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fizzbuzz.english.md
index 7dd39b15bb..42c2ffb4bc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fizzbuzz.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fizzbuzz.english.md
@@ -2,6 +2,7 @@
 title: FizzBuzz
 id: 5e9ddb06ec35240f39657419
 challengeType: 5
+isHidden: false
 forumTopicId: 385370
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fractran.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fractran.english.md
index 31738d5ac6..5975f7f288 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fractran.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/fractran.english.md
@@ -2,6 +2,7 @@
 title: Fractran
 id: 5a7dad05be01840e1778a0d1
 challengeType: 5
+isHidden: false
 forumTopicId: 302270
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gamma-function.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gamma-function.english.md
index 7afdccdb08..d4788b857b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gamma-function.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gamma-function.english.md
@@ -2,6 +2,7 @@
 title: Gamma function
 id: 5a23c84252665b21eecc7e76
 challengeType: 5
+isHidden: false
 forumTopicId: 302271
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gaussian-elimination.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gaussian-elimination.english.md
index be30214add..f37a9dfe30 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gaussian-elimination.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gaussian-elimination.english.md
@@ -2,6 +2,7 @@
 title: Gaussian elimination
 id: 5a23c84252665b21eecc7e77
 challengeType: 5
+isHidden: false
 forumTopicId: 302272
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/general-fizzbuzz.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/general-fizzbuzz.english.md
index 9621f8c74a..6868d53c1b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/general-fizzbuzz.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/general-fizzbuzz.english.md
@@ -2,6 +2,7 @@
 title: General FizzBuzz
 id: 5a23c84252665b21eecc7e78
 challengeType: 5
+isHidden: false
 forumTopicId: 302273
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generate-lower-case-ascii-alphabet.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generate-lower-case-ascii-alphabet.english.md
index a38843c4a5..c28e0e5815 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generate-lower-case-ascii-alphabet.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generate-lower-case-ascii-alphabet.english.md
@@ -2,6 +2,7 @@
 title: Generate lower case ASCII alphabet
 id: 5a23c84252665b21eecc7e7a
 challengeType: 5
+isHidden: false
 forumTopicId: 302274
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generator-exponential.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generator-exponential.english.md
index 320dca48c2..62ddf8ba3e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generator-exponential.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/generator-exponential.english.md
@@ -2,6 +2,7 @@
 title: Generator/Exponential
 id: 5a23c84252665b21eecc7e7b
 challengeType: 5
+isHidden: false
 forumTopicId: 302275
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gray-code.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gray-code.english.md
index 7a8c3169f7..3ce7d43121 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gray-code.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/gray-code.english.md
@@ -2,6 +2,7 @@
 title: Gray code
 id: 5a23c84252665b21eecc7e80
 challengeType: 5
+isHidden: false
 forumTopicId: 302276
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-common-divisor.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-common-divisor.english.md
index cf182dfbd5..b1ba4c1ba7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-common-divisor.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-common-divisor.english.md
@@ -2,6 +2,7 @@
 title: Greatest common divisor
 id: 5a23c84252665b21eecc7e82
 challengeType: 5
+isHidden: false
 forumTopicId: 302277
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-subsequential-sum.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-subsequential-sum.english.md
index b43d727cf3..7e1ce76feb 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-subsequential-sum.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/greatest-subsequential-sum.english.md
@@ -2,6 +2,7 @@
 title: Greatest subsequential sum
 id: 5a23c84252665b21eecc7e84
 challengeType: 5
+isHidden: false
 forumTopicId: 302278
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hailstone-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hailstone-sequence.english.md
index db555ef2fc..da022d33df 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hailstone-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hailstone-sequence.english.md
@@ -2,6 +2,7 @@
 title: Hailstone sequence
 id: 595608ff8bcd7a50bd490181
 challengeType: 5
+isHidden: false
 forumTopicId: 302279
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/happy-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/happy-numbers.english.md
index 186b1a3b00..9f5725d85d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/happy-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/happy-numbers.english.md
@@ -2,6 +2,7 @@
 title: Happy numbers
 id: 594810f028c0303b75339ad1
 challengeType: 5
+isHidden: false
 forumTopicId: 302280
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/harshad-or-niven-series.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/harshad-or-niven-series.english.md
index 93ea478a71..44fcbb7319 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/harshad-or-niven-series.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/harshad-or-niven-series.english.md
@@ -2,6 +2,7 @@
 title: Harshad or Niven series
 id: 595668ca4cfe1af2fb9818d4
 challengeType: 5
+isHidden: false
 forumTopicId: 302281
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-from-two-arrays.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-from-two-arrays.english.md
index 18575ce86a..db4d674e6a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-from-two-arrays.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-from-two-arrays.english.md
@@ -2,6 +2,7 @@
 title: Hash from two arrays
 id: 595671d4d2cdc305f0d5b36f
 challengeType: 5
+isHidden: false
 forumTopicId: 302283
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-join.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-join.english.md
index 6ff8e3a57c..2de92fb12c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-join.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hash-join.english.md
@@ -2,6 +2,7 @@
 title: Hash join
 id: 5956795bc9e2c415eb244de1
 challengeType: 5
+isHidden: false
 forumTopicId: 302284
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/heronian-triangles.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/heronian-triangles.english.md
index fcc13a0adb..2832591fcf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/heronian-triangles.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/heronian-triangles.english.md
@@ -2,6 +2,7 @@
 title: Heronian triangles
 id: 595b98f8b5a2245e243aa831
 challengeType: 5
+isHidden: false
 forumTopicId: 302285
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-figure-figure-sequences.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-figure-figure-sequences.english.md
index f2406d8984..c3d2490e3c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-figure-figure-sequences.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-figure-figure-sequences.english.md
@@ -2,6 +2,7 @@
 title: Hofstadter Figure-Figure sequences
 id: 59622f89e4e137560018a40e
 challengeType: 5
+isHidden: false
 forumTopicId: 302286
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-q-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-q-sequence.english.md
index b8a90f4c6f..d85d1e282b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-q-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/hofstadter-q-sequence.english.md
@@ -2,6 +2,7 @@
 title: Hofstadter Q sequence
 id: 59637c4d89f6786115efd814
 challengeType: 5
+isHidden: false
 forumTopicId: 302287
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/i-before-e-except-after-c.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/i-before-e-except-after-c.english.md
index 852b70fa25..5d33eaad56 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/i-before-e-except-after-c.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/i-before-e-except-after-c.english.md
@@ -2,6 +2,7 @@
 title: I before E except after C
 id: 5a23c84252665b21eecc7eb0
 challengeType: 5
+isHidden: false
 forumTopicId: 302288
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iban.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iban.english.md
index 6bdf61d16a..517e84b8bc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iban.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iban.english.md
@@ -2,6 +2,7 @@
 title: IBAN
 id: 5a23c84252665b21eecc7eaf
 challengeType: 5
+isHidden: false
 forumTopicId: 302289
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/identity-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/identity-matrix.english.md
index f0810aaeae..96257d72b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/identity-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/identity-matrix.english.md
@@ -2,6 +2,7 @@
 title: Identity matrix
 id: 5a23c84252665b21eecc7eb1
 challengeType: 5
+isHidden: false
 forumTopicId: 302290
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iterated-digits-squaring.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iterated-digits-squaring.english.md
index f66426b300..dfd8c8e4d1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iterated-digits-squaring.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/iterated-digits-squaring.english.md
@@ -2,6 +2,7 @@
 title: Iterated digits squaring
 id: 5a23c84252665b21eecc7ec1
 challengeType: 5
+isHidden: false
 forumTopicId: 302291
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jaro-distance.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jaro-distance.english.md
index 5fc572f055..277a67abc3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jaro-distance.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jaro-distance.english.md
@@ -2,6 +2,7 @@
 title: Jaro distance
 id: 5a23c84252665b21eecc7ec2
 challengeType: 5
+isHidden: false
 forumTopicId: 302292
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jortsort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jortsort.english.md
index 0109a6abde..d4c7be658a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jortsort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/jortsort.english.md
@@ -2,6 +2,7 @@
 title: JortSort
 id: 5a23c84252665b21eecc7ec4
 challengeType: 5
+isHidden: false
 forumTopicId: 302293
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/josephus-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/josephus-problem.english.md
index ec6ea162b5..29e6449ed6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/josephus-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/josephus-problem.english.md
@@ -2,6 +2,7 @@
 title: Josephus problem
 id: 5a23c84252665b21eecc7ec5
 challengeType: 5
+isHidden: false
 forumTopicId: 302294
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/k-d-tree.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/k-d-tree.english.md
index 02aa2646a4..f3180556b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/k-d-tree.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/k-d-tree.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ecb
 title: K-d tree
 challengeType: 5
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/kaprekar-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/kaprekar-numbers.english.md
index bcd2084616..6b46efa07f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/kaprekar-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/kaprekar-numbers.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7eca
 title: Kaprekar numbers
 challengeType: 5
+isHidden: false
 forumTopicId: 302296
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-0-1.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-0-1.english.md
index 28ca96649f..6024baf5bd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-0-1.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-0-1.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ed1
 title: Knapsack problem/0-1
 challengeType: 5
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-bounded.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-bounded.english.md
index 24c4897025..a75d5ec4ca 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-bounded.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-bounded.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ed2
 title: Knapsack problem/Bounded
 challengeType: 5
+isHidden: false
 forumTopicId: 323652
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-continuous.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-continuous.english.md
index 02d3d90448..175e4227b9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-continuous.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-continuous.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ed3
 title: Knapsack problem/Continuous
 challengeType: 5
+isHidden: false
 forumTopicId: 323654
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-unbounded.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-unbounded.english.md
index 521d646efc..521bb44bd4 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-unbounded.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knapsack-problem-unbounded.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ed4
 title: Knapsack problem/Unbounded
 challengeType: 5
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knights-tour.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knights-tour.english.md
index 431432112d..e87cc50b9b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knights-tour.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/knights-tour.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ed5
 title: Knight's tour
 challengeType: 5
+isHidden: false
 forumTopicId: 302297
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/largest-int-from-concatenated-ints.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/largest-int-from-concatenated-ints.english.md
index 3dbe4c7617..18d5164819 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/largest-int-from-concatenated-ints.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/largest-int-from-concatenated-ints.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7edb
 title: Largest int from concatenated ints
 challengeType: 5
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 forumTopicId: 302298
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-friday-of-each-month.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-friday-of-each-month.english.md
index 156f1b01ac..1903784cb6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-friday-of-each-month.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-friday-of-each-month.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7edc
 title: Last Friday of each month
 challengeType: 5
+isHidden: false
 forumTopicId: 302299
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-letter-first-letter.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-letter-first-letter.english.md
index d95355b160..c56a7ef0ff 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-letter-first-letter.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/last-letter-first-letter.english.md
@@ -2,6 +2,7 @@
 id: 5e4ce2b6ac708cc68c1df25e
 title: Last letter-first letter
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/leap-year.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/leap-year.english.md
index a743ffebd4..8ffe61112a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/leap-year.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/leap-year.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ede
 title: Leap year
 challengeType: 5
+isHidden: false
 forumTopicId: 302300
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/least-common-multiple.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/least-common-multiple.english.md
index 60dc731695..384563b001 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/least-common-multiple.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/least-common-multiple.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7edf
 title: Least common multiple
 challengeType: 5
+isHidden: false
 forumTopicId: 302301
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/left-factorials.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/left-factorials.english.md
index eaa57744ea..70c236bacc 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/left-factorials.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/left-factorials.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc7ee0
 title: Left factorials
 challengeType: 5
+isHidden: false
 forumTopicId: 302302
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/letter-frequency.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/letter-frequency.english.md
index 1da0057044..d94a6388e3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/letter-frequency.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/letter-frequency.english.md
@@ -2,6 +2,7 @@
 id: 5e4ce2bbac708cc68c1df25f
 title: Letter frequency
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/levenshtein-distance.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/levenshtein-distance.md
index 690306d7d8..3a38df8213 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/levenshtein-distance.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/levenshtein-distance.md
@@ -2,6 +2,7 @@
 id: 5e4ce2eaac708cc68c1df260
 title: Levenshtein distance
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/linear-congruential-generator.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/linear-congruential-generator.md
index 61535b2e8c..1702f98d5e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/linear-congruential-generator.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/linear-congruential-generator.md
@@ -2,6 +2,7 @@
 id: 5e4ce2f5ac708cc68c1df261
 title: Linear congruential generator
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/long-multiplication.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/long-multiplication.md
index a30899cc3f..41c893ff18 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/long-multiplication.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/long-multiplication.md
@@ -2,6 +2,7 @@
 id: 5e4ce2a1ac708cc68c1df25d
 title: Long multiplication
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-common-subsequence.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-common-subsequence.md
index 3253ded4cc..503ae555ca 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-common-subsequence.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-common-subsequence.md
@@ -2,6 +2,7 @@
 id: 5e6dd1278e6ca105cde40ea9
 title: Longest common subsequence
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-increasing-subsequence.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-increasing-subsequence.md
index f454cc94ca..f2fcc8cf3e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-increasing-subsequence.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-increasing-subsequence.md
@@ -2,6 +2,7 @@
 id: 5e6dd139859c290b6ab80292
 title: Longest increasing subsequence
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-string-challenge.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-string-challenge.md
index a9620bf935..85688a7d9f 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-string-challenge.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/longest-string-challenge.md
@@ -2,6 +2,7 @@
 id: 5e6dd14192286d95fc43046e
 title: Longest string challenge
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/look-and-say-sequence.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/look-and-say-sequence.md
index 2137823a1b..2ba51e77ab 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/look-and-say-sequence.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/look-and-say-sequence.md
@@ -2,6 +2,7 @@
 id: 5e6dd14797f5ce267c2f19d0
 title: Look-and-say sequence
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/loop-over-multiple-arrays-simultaneously.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/loop-over-multiple-arrays-simultaneously.md
index 487f8c21fc..51290584e9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/loop-over-multiple-arrays-simultaneously.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/loop-over-multiple-arrays-simultaneously.md
@@ -2,6 +2,7 @@
 id: 5e6dd15004c88cf00d2a78b3
 title: Loop over multiple arrays simultaneously
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lu-decomposition.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lu-decomposition.md
index 50a8540c67..5df7d81eaf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lu-decomposition.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lu-decomposition.md
@@ -2,6 +2,7 @@
 id: 5e6decd8ec8d7db960950d1c
 title: LU decomposition
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lucas-lehmer-test.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lucas-lehmer-test.md
index ec27e1e8ec..1b4d9afb84 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lucas-lehmer-test.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lucas-lehmer-test.md
@@ -2,6 +2,7 @@
 id: 5e6dee7749a0b85a3f1fc7d5
 title: Lucas-Lehmer test
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ludic-numbers.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ludic-numbers.md
index 72a642850f..564eabbf05 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ludic-numbers.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/ludic-numbers.md
@@ -2,6 +2,7 @@
 id: 5ea281203167d2b0bdefca00
 title: Ludic numbers
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/luhn-test-of-credit-card-numbers.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/luhn-test-of-credit-card-numbers.md
index 87d7434f97..d8588bdef7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/luhn-test-of-credit-card-numbers.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/luhn-test-of-credit-card-numbers.md
@@ -2,6 +2,7 @@
 id: 5ea28156e79528a9ab248f27
 title: Luhn test of credit card numbers
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lychrel-numbers.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lychrel-numbers.md
index 5f9297d07b..b5f8cbb2a1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lychrel-numbers.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lychrel-numbers.md
@@ -2,6 +2,7 @@
 id: 5ea2815a8640bcc6cb7dab3c
 title: Lychrel numbers
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lzw-compression.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lzw-compression.md
index 27006b5ca1..634401579e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lzw-compression.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/lzw-compression.md
@@ -2,6 +2,7 @@
 id: 5ea2815e364d9a2222ea55f8
 title: LZW compression
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/s-expressions.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/s-expressions.english.md
index b050311243..5e3349b5bf 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/s-expressions.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/s-expressions.english.md
@@ -2,6 +2,7 @@
 title: S-Expressions
 id: 59667989bf71cf555dd5d2ff
 challengeType: 5
+isHidden: false
 forumTopicId: 302303
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sailors-coconuts-and-a-monkey-problem.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sailors-coconuts-and-a-monkey-problem.english.md
index b8c7d7240e..28558ec457 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sailors-coconuts-and-a-monkey-problem.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sailors-coconuts-and-a-monkey-problem.english.md
@@ -2,6 +2,7 @@
 title: 'Sailors, coconuts and a monkey problem'
 id: 59da22823d04c95919d46269
 challengeType: 5
+isHidden: false
 forumTopicId: 302304
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sedols.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sedols.english.md
index 5993c3a1b9..71925e9d7d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sedols.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sedols.english.md
@@ -2,6 +2,7 @@
 title: SEDOLs
 id: 59d9c6bc214c613ba73ff012
 challengeType: 5
+isHidden: false
 forumTopicId: 302305
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/self-describing-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/self-describing-numbers.english.md
index 539db9e862..5d93c53974 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/self-describing-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/self-describing-numbers.english.md
@@ -2,6 +2,7 @@
 title: Self Describing Numbers
 id: 5eaf48389ee512d4d103684b
 challengeType: 5
+isHidden: false
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-an-array-of-composite-structures.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-an-array-of-composite-structures.english.md
index fc24eca545..9f038462a0 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-an-array-of-composite-structures.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-an-array-of-composite-structures.english.md
@@ -2,6 +2,7 @@
 title: Sort an array of composite structures
 id: 5a23c84252665b21eecc7ffe
 challengeType: 5
+isHidden: false
 forumTopicId: 302306
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-disjoint-sublist.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-disjoint-sublist.english.md
index 87420d0c29..e8197fb72c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-disjoint-sublist.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-disjoint-sublist.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8000
 title: Sort disjoint sublist
 challengeType: 5
+isHidden: false
 forumTopicId: 302307
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-stability.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-stability.english.md
index 418401b52b..19e83c56c8 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-stability.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-stability.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8014
 title: Sort stability
 challengeType: 5
+isHidden: false
 forumTopicId: 302308
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-using-a-custom-comparator.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-using-a-custom-comparator.english.md
index 01885155aa..0b0b302031 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-using-a-custom-comparator.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sort-using-a-custom-comparator.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8016
 title: Sort using a custom comparator
 challengeType: 5
+isHidden: false
 forumTopicId: 302309
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bead-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bead-sort.english.md
index 00b9114d8c..b5732c5dca 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bead-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bead-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8001
 title: Sorting algorithms/Bead sort
 challengeType: 5
+isHidden: false
 forumTopicId: 302310
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bogosort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bogosort.english.md
index a73b74a111..45e51b635e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bogosort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-bogosort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8002
 title: Sorting algorithms/Bogosort
 challengeType: 5
+isHidden: false
 forumTopicId: 302311
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-cocktail-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-cocktail-sort.english.md
index 6ba5c20238..a6b56a15fd 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-cocktail-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-cocktail-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8004
 title: Sorting algorithms/Cocktail sort
 challengeType: 5
+isHidden: false
 forumTopicId: 302312
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-comb-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-comb-sort.english.md
index 2f07e3e994..9eb9a396b3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-comb-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-comb-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8005
 title: Sorting algorithms/Comb sort
 challengeType: 5
+isHidden: false
 forumTopicId: 302313
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-gnome-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-gnome-sort.english.md
index 06e2ed8697..d515008228 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-gnome-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-gnome-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8007
 title: Sorting algorithms/Gnome sort
 challengeType: 5
+isHidden: false
 forumTopicId: 302314
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-pancake-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-pancake-sort.english.md
index 26f16d3916..c5fe5a7b05 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-pancake-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-pancake-sort.english.md
@@ -2,6 +2,7 @@
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 title: Sorting algorithms/Pancake sort
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-permutation-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-permutation-sort.english.md
index 3a2b82a733..edb7b7efce 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-permutation-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-permutation-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc800c
 title: Sorting algorithms/Permutation sort
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-shell-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-shell-sort.english.md
index f386b26fd0..3f6ac3312e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-shell-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-shell-sort.english.md
@@ -2,6 +2,7 @@
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 title: Sorting algorithms/Shell sort
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-stooge-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-stooge-sort.english.md
index bbd2c780c6..21dbddceb2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-stooge-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-stooge-sort.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8012
 title: Sorting algorithms/Stooge sort
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-strand-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-strand-sort.english.md
index 789ad7d624..11595b7140 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-strand-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sorting-algorithms-strand-sort.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/soundex.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/soundex.english.md
index 82d93b64b8..f8a5ff1b06 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/soundex.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/soundex.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/spiral-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/spiral-matrix.english.md
index 281a9782f9..452b772e41 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/spiral-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/spiral-matrix.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/split-a-character-string-based-on-change-of-character.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/split-a-character-string-based-on-change-of-character.english.md
index 6bf952fccc..adcad7917b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/split-a-character-string-based-on-change-of-character.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/split-a-character-string-based-on-change-of-character.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/state-name-puzzle.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/state-name-puzzle.english.md
index 8bf4e9b67a..f6f35abe4d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/state-name-puzzle.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/state-name-puzzle.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stern-brocot-sequence.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stern-brocot-sequence.english.md
index a55ec34158..4d91c77908 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stern-brocot-sequence.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stern-brocot-sequence.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/straddling-checkerboard.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/straddling-checkerboard.english.md
index bbe007c833..3ab1cbc604 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/straddling-checkerboard.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/straddling-checkerboard.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stream-merge.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stream-merge.english.md
index 6299dc10c9..af6d9466d3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stream-merge.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/stream-merge.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/strip-control-codes-and-extended-characters-from-a-string.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/strip-control-codes-and-extended-characters-from-a-string.english.md
index 2e6bd1874c..90b30368c3 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/strip-control-codes-and-extended-characters-from-a-string.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/strip-control-codes-and-extended-characters-from-a-string.english.md
@@ -2,6 +2,7 @@
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 title: Strip control codes and extended characters from a string
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/subleq.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/subleq.english.md
index 8d33bb167c..a94eba7fb2 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/subleq.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/subleq.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sudoku.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sudoku.english.md
index 580f16ea44..dc4665ad59 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sudoku.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sudoku.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-digits-of-an-integer.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-digits-of-an-integer.english.md
index f95a62e20a..a940b86996 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-digits-of-an-integer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-digits-of-an-integer.english.md
@@ -2,6 +2,7 @@
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 title: Sum digits of an integer
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-multiples-of-3-and-5.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-multiples-of-3-and-5.english.md
index d85f6a8173..973c996e64 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-multiples-of-3-and-5.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-multiples-of-3-and-5.english.md
@@ -2,6 +2,7 @@
 id: 5a23c84252665b21eecc8040
 title: Sum multiples of 3 and 5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-a-series.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-a-series.english.md
index f1ffe3c10e..fa60159ba5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-a-series.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-a-series.english.md
@@ -2,6 +2,7 @@
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 title: Sum of a series
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-squares.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-squares.english.md
index 8862ce63ce..88ec1554ec 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-squares.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-of-squares.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-to-100.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-to-100.english.md
index 8ac5b19064..9f5545c215 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-to-100.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sum-to-100.english.md
@@ -2,6 +2,7 @@
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 title: Sum to 100
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sutherland-hodgman-polygon-clipping.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sutherland-hodgman-polygon-clipping.english.md
index 44b2db0df8..b60c2c77b1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sutherland-hodgman-polygon-clipping.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/sutherland-hodgman-polygon-clipping.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/symmetric-difference.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/symmetric-difference.english.md
index 06a199f3ac..df9836ec8d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/symmetric-difference.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/symmetric-difference.english.md
@@ -2,6 +2,7 @@
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 title: Symmetric difference
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/taxicab-numbers.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/taxicab-numbers.english.md
index 771c4796df..e2f6cae465 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/taxicab-numbers.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/taxicab-numbers.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/tokenize-a-string-with-escaping.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/tokenize-a-string-with-escaping.english.md
index 23c200ca69..a6caf2d923 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/tokenize-a-string-with-escaping.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/tokenize-a-string-with-escaping.english.md
@@ -2,6 +2,7 @@
 title: Tokenize a string with escaping
 id: 594faaab4e2a8626833e9c3d
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/top-rank-per-group.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/top-rank-per-group.english.md
index 2d4520b486..48915d1788 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/top-rank-per-group.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/top-rank-per-group.english.md
@@ -2,6 +2,7 @@
 title: Top rank per group
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/topological-sort.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/topological-sort.english.md
index ee8a3e8678..05c1a61975 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/topological-sort.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/topological-sort.english.md
@@ -2,6 +2,7 @@
 title: Topological sort
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 challengeType: 5
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/towers-of-hanoi.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/towers-of-hanoi.english.md
index c045968a45..c304c7757b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/towers-of-hanoi.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/towers-of-hanoi.english.md
@@ -2,6 +2,7 @@
 title: Towers of Hanoi
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-cross-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-cross-product.english.md
index 76ea23c37d..408507d0c9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-cross-product.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-cross-product.english.md
@@ -2,6 +2,7 @@
 title: Vector cross product
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-dot-product.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-dot-product.english.md
index 87db5b085b..5ecc82f31d 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/vector-dot-product.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/word-wrap.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/word-wrap.english.md
index d40a76b1ed..ba1dd6be85 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/word-wrap.english.md
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@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/y-combinator.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/y-combinator.english.md
index feb2981af8..c7f66cc79b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/y-combinator.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/y-combinator.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zeckendorf-number-representation.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zeckendorf-number-representation.english.md
index 01911b9e28..611b7f9ca7 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zeckendorf-number-representation.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zeckendorf-number-representation.english.md
@@ -2,6 +2,7 @@
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zhang-suen-thinning-algorithm.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zhang-suen-thinning-algorithm.english.md
index 4c4bcba216..1d90365903 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zhang-suen-thinning-algorithm.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zhang-suen-thinning-algorithm.english.md
@@ -2,6 +2,7 @@
 title: Zhang-Suen thinning algorithm
 id: 594810f028c0303b75339ad7
 challengeType: 5
+isHidden: false
 forumTopicId: 302347
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zig-zag-matrix.english.md b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zig-zag-matrix.english.md
index c1f18ad86c..56236583b6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zig-zag-matrix.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/rosetta-code/zig-zag-matrix.english.md
@@ -2,6 +2,7 @@
 title: Zig-zag matrix
 id: 594810f028c0303b75339ad8
 challengeType: 5
+isHidden: false
 forumTopicId: 302348
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-camper-leaderboard.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-camper-leaderboard.english.md
index 1621b899d8..33ef235ef1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-camper-leaderboard.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-camper-leaderboard.english.md
@@ -3,6 +3,7 @@ id: bd7156d8c242eddfaeb5bd13
 title: Build a freeCodeCamp Forum Homepage
 isRequired: false
 challengeType: 3
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 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-light-bright-app.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-light-bright-app.english.md
index a0596d5585..dab1aa50f9 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-light-bright-app.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-light-bright-app.english.md
@@ -2,6 +2,7 @@
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 title: Build a Light-Bright App
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diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-nightlife-coordination-app.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-nightlife-coordination-app.english.md
index 85eaf918ad..f40914bcaa 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-nightlife-coordination-app.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-nightlife-coordination-app.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443eddfaeb5bdff
 title: Build a Nightlife Coordination App
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 forumTopicId: 302351
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pinterest-clone.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pinterest-clone.english.md
index ee20cd6ae5..747dae56f6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pinterest-clone.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pinterest-clone.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443eddfaeb5bdee
 title: Build a Pinterest Clone
 challengeType: 4
+isHidden: false
 forumTopicId: 302352
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pong-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pong-game.english.md
index ae42bc6c43..6dd9359587 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pong-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-pong-game.english.md
@@ -2,6 +2,7 @@
 id: 5a4b7fcdb66f799f199e11db
 title: Build a Pong Game
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-recipe-box.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-recipe-box.english.md
index beb01677cc..aa6e260874 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-recipe-box.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-recipe-box.english.md
@@ -3,6 +3,7 @@ id: bd7155d8c242eddfaeb5bd13
 title: Build a Recipe Box
 isRequired: false
 challengeType: 3
+isHidden: false
 forumTopicId: 302354
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-roguelike-dungeon-crawler-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-roguelike-dungeon-crawler-game.english.md
index 614e3407fc..92f128494c 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-roguelike-dungeon-crawler-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-roguelike-dungeon-crawler-game.english.md
@@ -3,6 +3,7 @@ id: bd7153d8c242eddfaeb5bd13
 title: Build a Roguelike Dungeon Crawler Game
 isRequired: false
 challengeType: 3
+isHidden: false
 forumTopicId: 302355
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-simon-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-simon-game.english.md
index c1e1be1f07..1c71d300f6 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-simon-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-simon-game.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eddfaeb5bd1c
 title: Build a Simon Game
 challengeType: 3
+isHidden: false
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 forumTopicId: 302357
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-tic-tac-toe-game.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-tic-tac-toe-game.english.md
index 4108ce5a10..bdbb3f8ce5 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-tic-tac-toe-game.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-tic-tac-toe-game.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eedfaeb5bd1c
 title: Build a Tic Tac Toe Game
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 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-voting-app.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-voting-app.english.md
index 394028aec6..4c760247f1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-voting-app.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-voting-app.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443eddfaeb5bdef
 title: Build a Voting App
 challengeType: 4
+isHidden: false
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 forumTopicId: 302359
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-wikipedia-viewer.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-wikipedia-viewer.english.md
index 75df5da507..e79547641e 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-wikipedia-viewer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-a-wikipedia-viewer.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eddfaeb5bd19
 title: Build a Wikipedia Viewer
 challengeType: 3
+isHidden: false
 isRequired: false
 forumTopicId: 302360
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-an-image-search-abstraction-layer.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-an-image-search-abstraction-layer.english.md
index 91ee1af6b4..a85f440c5b 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-an-image-search-abstraction-layer.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-an-image-search-abstraction-layer.english.md
@@ -3,6 +3,7 @@ id: bd7158d8c443edefaeb5bdee
 title: Build an Image Search Abstraction Layer
 isRequired: true
 challengeType: 4
+isHidden: false
 forumTopicId: 302361
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-the-game-of-life.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-the-game-of-life.english.md
index e5ba369f26..d442b13475 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-the-game-of-life.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/build-the-game-of-life.english.md
@@ -3,6 +3,7 @@ id: bd7154d8c242eddfaeb5bd13
 title: Build the Game of Life
 isRequired: false
 challengeType: 3
+isHidden: false
 forumTopicId: 302362
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/chart-the-stock-market.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/chart-the-stock-market.english.md
index 051b2ffbcd..83a0443596 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/chart-the-stock-market.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/chart-the-stock-market.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443eddfaeb5bd0e
 title: Chart the Stock Market
 challengeType: 4
+isHidden: false
 isRequired: true
 forumTopicId: 302363
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/manage-a-book-trading-club.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/manage-a-book-trading-club.english.md
index 34f081aabb..578ceee38a 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/manage-a-book-trading-club.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/manage-a-book-trading-club.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c443eddfaeb5bd0f
 title: Manage a Book Trading Club
 challengeType: 4
+isHidden: false
 forumTopicId: 302364
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/map-data-across-the-globe.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/map-data-across-the-globe.english.md
index 89e5003d02..ec822a1812 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/map-data-across-the-globe.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/map-data-across-the-globe.english.md
@@ -3,6 +3,7 @@ id: bd7108d8c242eddfaeb5bd13
 title: Map Data Across the Globe
 isRequired: false
 challengeType: 3
+isHidden: false
 forumTopicId: 302365
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/p2p-video-chat-application.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/p2p-video-chat-application.english.md
index 1339680541..b87fe279d1 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/p2p-video-chat-application.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/p2p-video-chat-application.english.md
@@ -2,6 +2,7 @@
 id: bd7150d8c442eddfafb5bd1c
 title: P2P Video Chat Application
 challengeType: 3
+isHidden: false
 isRequired: false
 forumTopicId: 302366
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-national-contiguity-with-a-force-directed-graph.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-national-contiguity-with-a-force-directed-graph.english.md
index d5381a50b6..85153c1379 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-national-contiguity-with-a-force-directed-graph.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-national-contiguity-with-a-force-directed-graph.english.md
@@ -3,6 +3,7 @@ id: bd7198d8c242eddfaeb5bd13
 title: Show National Contiguity with a Force Directed Graph
 isRequired: false
 challengeType: 3
+isHidden: false
 forumTopicId: 302367
 ---
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-the-local-weather.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-the-local-weather.english.md
index 9cea38c177..6db2c65662 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-the-local-weather.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/show-the-local-weather.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eddfaeb5bd10
 title: Show the Local Weather
 challengeType: 3
+isHidden: false
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 forumTopicId: 302368
 ---
diff --git a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/use-the-twitch-json-api.english.md b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/use-the-twitch-json-api.english.md
index 2151c7662a..14178e0a78 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/use-the-twitch-json-api.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/take-home-projects/use-the-twitch-json-api.english.md
@@ -2,6 +2,7 @@
 id: bd7158d8c442eddfaeb5bd1f
 title: Use the Twitch JSON API
 challengeType: 3
+isHidden: false
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 ---
diff --git a/curriculum/challenges/english/09-certificates/apis-and-microservices-certificate/apis-and-microservices-certificate.english.md b/curriculum/challenges/english/09-certificates/apis-and-microservices-certificate/apis-and-microservices-certificate.english.md
index 7c9ba25920..f531273059 100644
--- a/curriculum/challenges/english/09-certificates/apis-and-microservices-certificate/apis-and-microservices-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/apis-and-microservices-certificate/apis-and-microservices-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561add10cb82ac38a17523bc
 title: API's and Microservices Certificate
 challengeType: 7
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/09-certificates/data-visualization-certificate/data-visualization-certificate.english.md b/curriculum/challenges/english/09-certificates/data-visualization-certificate/data-visualization-certificate.english.md
index 88fc0d8fc9..76f27bfbbe 100644
--- a/curriculum/challenges/english/09-certificates/data-visualization-certificate/data-visualization-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/data-visualization-certificate/data-visualization-certificate.english.md
@@ -2,6 +2,7 @@
 id: 5a553ca864b52e1d8bceea14
 title: Data Visualization Certificate
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+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/09-certificates/front-end-libraries-certificate/front-end-libraries-certificate.english.md b/curriculum/challenges/english/09-certificates/front-end-libraries-certificate/front-end-libraries-certificate.english.md
index 5bf0ae561b..a2aeebca9e 100644
--- a/curriculum/challenges/english/09-certificates/front-end-libraries-certificate/front-end-libraries-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/front-end-libraries-certificate/front-end-libraries-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561acd10cb82ac38a17513bc
 title: Front End Libraries Certificate
 challengeType: 7
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/09-certificates/information-securtiy-and-quality-assurance-certificate/information-securtiy-and-quality-assurance-certificate.english.md b/curriculum/challenges/english/09-certificates/information-securtiy-and-quality-assurance-certificate/information-securtiy-and-quality-assurance-certificate.english.md
index 14d45189dd..9a62f23091 100644
--- a/curriculum/challenges/english/09-certificates/information-securtiy-and-quality-assurance-certificate/information-securtiy-and-quality-assurance-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/information-securtiy-and-quality-assurance-certificate/information-securtiy-and-quality-assurance-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561add10cb82ac38a17213bc
 title: 'Information, Securtiy and Quality Assurance Certificate'
 challengeType: 7
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/09-certificates/javascript-algorithms-and-data-structures-certificate/javascript-algorithms-and-data-structures-certificate.english.md b/curriculum/challenges/english/09-certificates/javascript-algorithms-and-data-structures-certificate/javascript-algorithms-and-data-structures-certificate.english.md
index 6010d4a3e2..d816367771 100644
--- a/curriculum/challenges/english/09-certificates/javascript-algorithms-and-data-structures-certificate/javascript-algorithms-and-data-structures-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/javascript-algorithms-and-data-structures-certificate/javascript-algorithms-and-data-structures-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561abd10cb81ac38a17513bc
 title: JavaScript Algorithms and Data Structures Certificate
 challengeType: 7
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/09-certificates/legacy-back-end-certificate/legacy-back-end-certificate.english.md b/curriculum/challenges/english/09-certificates/legacy-back-end-certificate/legacy-back-end-certificate.english.md
index be1f4a89ba..9ac6f86ed0 100644
--- a/curriculum/challenges/english/09-certificates/legacy-back-end-certificate/legacy-back-end-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/legacy-back-end-certificate/legacy-back-end-certificate.english.md
@@ -2,6 +2,7 @@
 id: 660add10cb82ac38a17513be
 title: Legacy Back End Certificate
 challengeType: 7
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/09-certificates/legacy-data-visualization-certificate/legacy-data-visualization-certificate.english.md b/curriculum/challenges/english/09-certificates/legacy-data-visualization-certificate/legacy-data-visualization-certificate.english.md
index ee9ee5603c..dcc2a8926f 100644
--- a/curriculum/challenges/english/09-certificates/legacy-data-visualization-certificate/legacy-data-visualization-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/legacy-data-visualization-certificate/legacy-data-visualization-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561add10cb82ac39a17513bc
 title: Legacy Data Visualization Certificate
 challengeType: 7
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/09-certificates/legacy-front-end-certificate/legacy-front-end-certificate.english.md b/curriculum/challenges/english/09-certificates/legacy-front-end-certificate/legacy-front-end-certificate.english.md
index 0eb5fdcb39..71c7c8fb42 100644
--- a/curriculum/challenges/english/09-certificates/legacy-front-end-certificate/legacy-front-end-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/legacy-front-end-certificate/legacy-front-end-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561add10cb82ac38a17513be
 title: Legacy Front End Certificate
 challengeType: 7
+isHidden: false
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 ---
 
diff --git a/curriculum/challenges/english/09-certificates/responsive-web-design-certificate/responsive-web-design-certificate.english.md b/curriculum/challenges/english/09-certificates/responsive-web-design-certificate/responsive-web-design-certificate.english.md
index 29c9bf8804..7422a23ee5 100644
--- a/curriculum/challenges/english/09-certificates/responsive-web-design-certificate/responsive-web-design-certificate.english.md
+++ b/curriculum/challenges/english/09-certificates/responsive-web-design-certificate/responsive-web-design-certificate.english.md
@@ -2,6 +2,7 @@
 id: 561add10cb82ac38a17513bc
 title: Responsive Web Design Certificate
 challengeType: 7
+isHidden: false
 isPrivate: true
 ---