diff --git a/curriculum/challenges/_meta/basic-html-cat-photo-app/meta.json b/curriculum/challenges/_meta/basic-html-cat-photo-app/meta.json
index 3d2d2e438a..347ef9e5f9 100644
--- a/curriculum/challenges/_meta/basic-html-cat-photo-app/meta.json
+++ b/curriculum/challenges/_meta/basic-html-cat-photo-app/meta.json
@@ -11,39 +11,39 @@
   "challengeOrder": [
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+      "Part 1"
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diff --git a/curriculum/challenges/_meta/basic-javascript-rpg-game/meta.json b/curriculum/challenges/_meta/basic-javascript-rpg-game/meta.json
index 21308ebab4..a7646e1525 100644
--- a/curriculum/challenges/_meta/basic-javascript-rpg-game/meta.json
+++ b/curriculum/challenges/_meta/basic-javascript-rpg-game/meta.json
@@ -11,39 +11,39 @@
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@@ -121,10 +121,6 @@
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diff --git a/curriculum/challenges/_meta/css-variables-skyline/meta.json b/curriculum/challenges/_meta/css-variables-skyline/meta.json
index 63fe8aad79..78262a4e3e 100644
--- a/curriculum/challenges/_meta/css-variables-skyline/meta.json
+++ b/curriculum/challenges/_meta/css-variables-skyline/meta.json
@@ -314,171 +314,171 @@
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diff --git a/curriculum/challenges/_meta/functional-programming-spreadsheet/meta.json b/curriculum/challenges/_meta/functional-programming-spreadsheet/meta.json
index 6f4d19d0d6..9bbf049418 100644
--- a/curriculum/challenges/_meta/functional-programming-spreadsheet/meta.json
+++ b/curriculum/challenges/_meta/functional-programming-spreadsheet/meta.json
@@ -11,399 +11,399 @@
   "challengeOrder": [
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+      "Part 1"
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+      "Part 2"
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@@ -576,4 +576,4 @@
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   "helpRoom": "HelpJavaScript",
   "fileName": "02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet.json"
-}
+}
\ No newline at end of file
diff --git a/curriculum/challenges/_meta/intermediate-javascript-calorie-counter/meta.json b/curriculum/challenges/_meta/intermediate-javascript-calorie-counter/meta.json
index 7f6287f5a4..11636c6e04 100644
--- a/curriculum/challenges/_meta/intermediate-javascript-calorie-counter/meta.json
+++ b/curriculum/challenges/_meta/intermediate-javascript-calorie-counter/meta.json
@@ -10,39 +10,39 @@
   "challengeOrder": [
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-      "Part 01"
+      "Part 1"
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-      "Part 02"
+      "Part 2"
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-      "Part 03"
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     [
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-      "Part 04"
+      "Part 4"
     ],
     [
       "5ddb965c65d27e1512d44d9e",
-      "Part 05"
+      "Part 5"
     ],
     [
       "5ddb965c65d27e1512d44d9f",
-      "Part 06"
+      "Part 6"
     ],
     [
       "5ddb965c65d27e1512d44da0",
-      "Part 07"
+      "Part 7"
     ],
     [
       "5ddb965c65d27e1512d44da1",
-      "Part 08"
+      "Part 8"
     ],
     [
       "5ddb965c65d27e1512d44da2",
-      "Part 09"
+      "Part 9"
     ],
     [
       "5ddb965c65d27e1512d44da3",
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-01.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-001.md
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rename to curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-001.md
index d5834b1d8a..664989aa4f 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-01.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-001.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc174fcf86c76b9248c6eb2
-title: Part 01
+title: Part 1
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-02.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-002.md
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rename to curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-002.md
index 254e1e0ca7..d5fdfc232d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-02.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-002.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc1798ff86c76b9248c6eb3
-title: Part 02
+title: Part 2
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-03.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-003.md
similarity index 99%
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index 164d927312..94a3c094c7 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-03.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-003.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc17d3bf86c76b9248c6eb4
-title: Part 03
+title: Part 3
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-04.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-004.md
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index c315d79933..4cc57d2841 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-04.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-004.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc17dc8f86c76b9248c6eb5
-title: Part 04
+title: Part 4
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-05.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-005.md
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index b985279193..575c68fb2b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-05.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-005.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc2385ff86c76b9248c6eb7
-title: Part 05
+title: Part 5
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-06.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-006.md
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index b072804107..1dce1bb274 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-06.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-006.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc23991f86c76b9248c6eb8
-title: Part 06
+title: Part 6
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-07.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-007.md
similarity index 99%
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index bc62642997..737163dbe9 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-07.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-007.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc23f9bf86c76b9248c6eba
-title: Part 07
+title: Part 7
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-08.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-008.md
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index d217146a02..6a76f460ff 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-08.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-008.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc24073f86c76b9248c6ebb
-title: Part 08
+title: Part 8
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-09.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-009.md
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index 68c6ee6c2d..e4123af4ee 100644
--- a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-09.md
+++ b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-009.md
@@ -1,6 +1,6 @@
 ---
 id: 5dc24165f86c76b9248c6ebc
-title: Part 09
+title: Part 9
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-10.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-010.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-11.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-011.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-12.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-012.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-14.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-014.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-18.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-018.md
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diff --git a/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-19.md b/curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-019.md
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rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-082.md
index c2ae945741..e3df5cee8b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-83.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-082.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e991b
-title: Part 83
+title: Part 82
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-84.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-083.md
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rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-083.md
index 68ec6f39ad..8c327d6ccb 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-84.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-083.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e991c
-title: Part 84
+title: Part 83
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-85.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-084.md
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rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-084.md
index de3a299cd3..0f99d5becc 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-85.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-084.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e991d
-title: Part 85
+title: Part 84
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-86.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-085.md
similarity index 99%
rename from curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-86.md
rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-085.md
index a060c5cf57..40b761672d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-86.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-085.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e991e
-title: Part 86
+title: Part 85
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-87.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-086.md
similarity index 99%
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rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-086.md
index dfb1cf8237..c36cc26047 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-87.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-086.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e991f
-title: Part 87
+title: Part 86
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-88.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-087.md
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rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-087.md
index 182a63dd11..59572c2248 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-88.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-087.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9920
-title: Part 88
+title: Part 87
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-89.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-088.md
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index feebd99a15..cca73b49a1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-89.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-088.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9921
-title: Part 89
+title: Part 88
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-90.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-089.md
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index d64ed2b1ac..9154bc6d27 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-90.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-089.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9922
-title: Part 90
+title: Part 89
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-91.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-090.md
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index 218d553bef..91d9762530 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-91.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-090.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9923
-title: Part 91
+title: Part 90
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-92.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-091.md
similarity index 99%
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index 561213fd65..bf27300bab 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-92.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-091.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9924
-title: Part 92
+title: Part 91
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-93.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-092.md
similarity index 99%
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index 692980884b..b885748590 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-93.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-092.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9925
-title: Part 93
+title: Part 92
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-94.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-093.md
similarity index 99%
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index ef0e787d1e..8f86752fd5 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-94.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-093.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9926
-title: Part 94
+title: Part 93
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-95.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-094.md
similarity index 99%
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index 95a5ea2e66..b5236ebb21 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-95.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-094.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9927
-title: Part 95
+title: Part 94
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-96.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-095.md
similarity index 99%
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index 77c8f0c439..49da516707 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-96.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-095.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9928
-title: Part 96
+title: Part 95
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-97.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-096.md
similarity index 99%
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index 815e900a07..ccedfb59b2 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-97.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-096.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e9929
-title: Part 97
+title: Part 96
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-98.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-097.md
similarity index 99%
rename from curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-98.md
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index df8dcb22a6..de80769af5 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-98.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-097.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e992a
-title: Part 98
+title: Part 97
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-99.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-098.md
similarity index 99%
rename from curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-99.md
rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-098.md
index 242712f4c1..a792becf8c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-99.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-098.md
@@ -1,6 +1,6 @@
 ---
 id: 5d822fd413a79914d39e992b
-title: Part 99
+title: Part 98
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-099.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-099.md
new file mode 100644
index 0000000000..1cf2e81b41
--- /dev/null
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-099.md
@@ -0,0 +1,706 @@
+---
+id: 5d822fd413a79914d39e992c
+title: Part 99
+challengeType: 0
+isHidden: true
+---
+
+## Description
+<section id='description'>
+
+Nest six `div` elements within `fb4b` and give them all a class of `fb4-window`.
+</section>
+
+## Instructions
+<section id='instructions'>
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: test-text
+    testString: assert($(".fb4b").children("div.fb4-window").length === 6);
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+<div id='html-seed'>
+
+```html
+<!DOCTYPE html>
+<html>    
+  <head>
+    <title>freeCodeCamp Skyline Project</title>
+    <style>
+      :root {
+        --building-color1: #aa80ff;
+        --building-color2: #66cc99;
+        --building-color3: #cc6699;
+        --building-color4: #538cc6;
+        --window-color1: #bb99ff;
+        --window-color2: #8cd9b3;
+        --window-color3: #d98cb3;
+        --window-color4: #8cb3d9;
+      }
+
+      * {
+        border: 1px solid black;
+        box-sizing: border-box;
+      }
+
+      body {
+        height: 100vh;
+        margin: 0;
+        overflow: hidden;
+      }
+
+      .background-buildings, .foreground-buildings {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        align-items: flex-end;
+        justify-content: space-evenly;
+        position: absolute;
+        top: 0;
+      }
+      
+      .building-wrap {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+      }
+
+      .window-wrap {
+        display: flex;
+        align-items: center;
+        justify-content: space-evenly;
+      }
+
+      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
+      .bb1 {
+        width: 10%;
+        height: 70%;
+      }
+
+      .bb1a {
+        width: 70%;
+      }
+  
+      .bb1b {
+        width: 80%;
+      }
+  
+      .bb1c {
+        width: 90%;
+      }
+
+      .bb1d {
+        width: 100%;
+        height: 70%;
+        background: linear-gradient(
+            var(--building-color1) 50%,
+            var(--window-color1)
+          );
+      }
+
+      .bb1-window {
+        height: 10%;
+        background: linear-gradient(
+            var(--building-color1),
+            var(--window-color1)
+          );
+      }
+
+      .bb2 {
+        width: 10%;
+        height: 50%;
+      }
+
+      .bb2a {
+        border-bottom: 5vh solid var(--building-color2);
+        border-left: 5vw solid transparent;
+        border-right: 5vw solid transparent;
+      }
+
+      .bb2b {
+        width: 100%;
+        height: 100%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 6%,
+            var(--window-color2) 6%,
+            var(--window-color2) 9%
+          );
+      }
+      
+      .bb3 {
+        width: 10%;
+        height: 55%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3),
+            var(--window-color3) 15%
+          );
+      }
+
+      .bb4 {
+        width: 11%;
+        height: 58%;
+      }
+
+      .bb4a {
+        width: 3%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4b {
+        width: 80%;
+        height: 5%;
+        background-color: var(--building-color4);
+      }
+  
+      .bb4c {
+        width: 100%;
+        height: 85%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4-window {
+        width: 18%;
+        height: 90%;
+        background-color: var(--window-color4);
+      }
+
+      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
+      .fb1 {
+        width: 10%;
+        height: 60%;
+      }
+
+      .fb1a {
+        border-bottom: 7vh solid var(--building-color4);
+        border-left: 2vw solid transparent;
+        border-right: 2vw solid transparent;
+      }
+
+      .fb1b {
+        width: 60%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+  
+      .fb1c {
+        width: 100%;
+        height: 80%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color4),
+            var(--building-color4) 10%,
+            transparent 10%,
+            transparent 15%
+          ),
+          repeating-linear-gradient(
+            var(--building-color4),
+            var(--building-color4) 10%,
+            var(--window-color4) 10%,
+            var(--window-color4) 90%
+          );
+      }
+
+      .fb2 {
+        width: 10%;
+        height: 40%;
+      }
+
+      .fb2a {
+        width: 100%;
+        border-bottom: 10vh solid var(--building-color3);
+        border-left: 1vw solid transparent;
+        border-right: 1vw solid transparent;
+      }
+
+      .fb2b {
+        width: 100%;
+        height: 75%;
+        background-color: var(--building-color3);
+      }
+
+      .fb2-window {
+        width: 22%;
+        height: 100%;
+        background-color: var(--window-color3);
+      }
+
+      .fb3 {
+        width: 10%;
+        height: 35%;
+      }
+  
+      .fb3a {
+        width: 80%;
+        height: 15%;
+        background-color: var(--building-color1);
+      }
+  
+      .fb3b {
+        width: 100%;
+        height: 35%;
+        background-color: var(--building-color1);
+      }
+
+      .fb3-window {
+        width: 25%;
+        height: 80%;
+        background-color: var(--window-color1);
+      }
+
+      .fb4 {
+        width: 8%;
+        height: 45%;
+        position: relative;
+        left: 10%;
+      }
+
+      .fb4b {
+        width: 100%;
+        height: 89%;
+        background-color: var(--building-color1);
+      }
+      
+      .fb5 {
+        width: 10%;
+        height: 33%;
+        background-color: var(--building-color2);
+        position: relative;
+        right: 10%;
+      }
+
+      .fb6 {
+        width: 9%;
+        height: 38%;
+        background-color: var(--building-color3);
+      }
+    </style>
+  </head>
+
+  <body>
+    <div class="background-buildings">
+      <div></div>
+      <div></div>
+      <div class="bb1 building-wrap">
+        <div class="bb1a bb1-window"></div>
+        <div class="bb1b bb1-window"></div>
+        <div class="bb1c bb1-window"></div>
+        <div class="bb1d"></div>
+      </div>
+      <div class="bb2">
+        <div class="bb2a"></div>
+        <div class="bb2b"></div>
+      </div>
+      <div class="bb3"></div>
+      <div></div>
+      <div class="bb4 building-wrap">
+        <div class="bb4a"></div>
+        <div class="bb4b"></div>
+        <div class="bb4c window-wrap">
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div></div>
+    </div>
+
+    <div class="foreground-buildings">
+      <div></div>
+      <div></div>
+      <div class="fb1 building-wrap">
+        <div class="fb1a"></div>
+        <div class="fb1b"></div>
+        <div class="fb1c"></div>
+      </div>
+      <div class="fb2">
+        <div class="fb2a"></div>
+        <div class="fb2b window-wrap">
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div class="fb3 building-wrap">
+        <div class="fb3a window-wrap">
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+        </div>
+        <div class="fb3b"></div>
+        <div class="fb3a"></div>
+        <div class="fb3b"></div>
+      </div>
+      <div class="fb4">
+        <div class="fb4a"></div>
+        <div class="fb4b"></div>
+      </div>
+      <div class="fb5"></div>
+      <div class="fb6"></div>
+      <div></div>
+      <div></div>
+    </div>
+  </body>
+</html>
+```
+
+</div>
+</section>
+
+
+## Solution
+<section id='solution'>
+
+```html
+<!DOCTYPE html>
+<html>    
+  <head>
+    <title>freeCodeCamp Skyline Project</title>
+    <style>
+      :root {
+        --building-color1: #aa80ff;
+        --building-color2: #66cc99;
+        --building-color3: #cc6699;
+        --building-color4: #538cc6;
+        --window-color1: #bb99ff;
+        --window-color2: #8cd9b3;
+        --window-color3: #d98cb3;
+        --window-color4: #8cb3d9;
+      }
+
+      * {
+        border: 1px solid black;
+        box-sizing: border-box;
+      }
+
+      body {
+        height: 100vh;
+        margin: 0;
+        overflow: hidden;
+      }
+
+      .background-buildings, .foreground-buildings {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        align-items: flex-end;
+        justify-content: space-evenly;
+        position: absolute;
+        top: 0;
+      }
+      
+      .building-wrap {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+      }
+
+      .window-wrap {
+        display: flex;
+        align-items: center;
+        justify-content: space-evenly;
+      }
+
+      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
+      .bb1 {
+        width: 10%;
+        height: 70%;
+      }
+
+      .bb1a {
+        width: 70%;
+      }
+  
+      .bb1b {
+        width: 80%;
+      }
+  
+      .bb1c {
+        width: 90%;
+      }
+
+      .bb1d {
+        width: 100%;
+        height: 70%;
+        background: linear-gradient(
+            var(--building-color1) 50%,
+            var(--window-color1)
+          );
+      }
+
+      .bb1-window {
+        height: 10%;
+        background: linear-gradient(
+            var(--building-color1),
+            var(--window-color1)
+          );
+      }
+
+      .bb2 {
+        width: 10%;
+        height: 50%;
+      }
+
+      .bb2a {
+        border-bottom: 5vh solid var(--building-color2);
+        border-left: 5vw solid transparent;
+        border-right: 5vw solid transparent;
+      }
+
+      .bb2b {
+        width: 100%;
+        height: 100%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 6%,
+            var(--window-color2) 6%,
+            var(--window-color2) 9%
+          );
+      }
+      
+      .bb3 {
+        width: 10%;
+        height: 55%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3),
+            var(--window-color3) 15%
+          );
+      }
+
+      .bb4 {
+        width: 11%;
+        height: 58%;
+      }
+
+      .bb4a {
+        width: 3%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4b {
+        width: 80%;
+        height: 5%;
+        background-color: var(--building-color4);
+      }
+  
+      .bb4c {
+        width: 100%;
+        height: 85%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4-window {
+        width: 18%;
+        height: 90%;
+        background-color: var(--window-color4);
+      }
+
+      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
+      .fb1 {
+        width: 10%;
+        height: 60%;
+      }
+
+      .fb1a {
+        border-bottom: 7vh solid var(--building-color4);
+        border-left: 2vw solid transparent;
+        border-right: 2vw solid transparent;
+      }
+
+      .fb1b {
+        width: 60%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+  
+      .fb1c {
+        width: 100%;
+        height: 80%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color4),
+            var(--building-color4) 10%,
+            transparent 10%,
+            transparent 15%
+          ),
+          repeating-linear-gradient(
+            var(--building-color4),
+            var(--building-color4) 10%,
+            var(--window-color4) 10%,
+            var(--window-color4) 90%
+          );
+      }
+
+      .fb2 {
+        width: 10%;
+        height: 40%;
+      }
+
+      .fb2a {
+        width: 100%;
+        border-bottom: 10vh solid var(--building-color3);
+        border-left: 1vw solid transparent;
+        border-right: 1vw solid transparent;
+      }
+
+      .fb2b {
+        width: 100%;
+        height: 75%;
+        background-color: var(--building-color3);
+      }
+
+      .fb2-window {
+        width: 22%;
+        height: 100%;
+        background-color: var(--window-color3);
+      }
+
+      .fb3 {
+        width: 10%;
+        height: 35%;
+      }
+  
+      .fb3a {
+        width: 80%;
+        height: 15%;
+        background-color: var(--building-color1);
+      }
+  
+      .fb3b {
+        width: 100%;
+        height: 35%;
+        background-color: var(--building-color1);
+      }
+
+      .fb3-window {
+        width: 25%;
+        height: 80%;
+        background-color: var(--window-color1);
+      }
+
+      .fb4 {
+        width: 8%;
+        height: 45%;
+        position: relative;
+        left: 10%;
+      }
+
+      .fb4b {
+        width: 100%;
+        height: 89%;
+        background-color: var(--building-color1);
+      }
+      
+      .fb5 {
+        width: 10%;
+        height: 33%;
+        background-color: var(--building-color2);
+        position: relative;
+        right: 10%;
+      }
+
+      .fb6 {
+        width: 9%;
+        height: 38%;
+        background-color: var(--building-color3);
+      }
+    </style>
+  </head>
+
+  <body>
+    <div class="background-buildings">
+      <div></div>
+      <div></div>
+      <div class="bb1 building-wrap">
+        <div class="bb1a bb1-window"></div>
+        <div class="bb1b bb1-window"></div>
+        <div class="bb1c bb1-window"></div>
+        <div class="bb1d"></div>
+      </div>
+      <div class="bb2">
+        <div class="bb2a"></div>
+        <div class="bb2b"></div>
+      </div>
+      <div class="bb3"></div>
+      <div></div>
+      <div class="bb4 building-wrap">
+        <div class="bb4a"></div>
+        <div class="bb4b"></div>
+        <div class="bb4c window-wrap">
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div></div>
+    </div>
+
+    <div class="foreground-buildings">
+      <div></div>
+      <div></div>
+      <div class="fb1 building-wrap">
+        <div class="fb1a"></div>
+        <div class="fb1b"></div>
+        <div class="fb1c"></div>
+      </div>
+      <div class="fb2">
+        <div class="fb2a"></div>
+        <div class="fb2b window-wrap">
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div class="fb3 building-wrap">
+        <div class="fb3a window-wrap">
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+        </div>
+        <div class="fb3b"></div>
+        <div class="fb3a"></div>
+        <div class="fb3b"></div>
+      </div>
+      <div class="fb4">
+        <div class="fb4a"></div>
+        <div class="fb4b">
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+        </div>
+      </div>
+      <div class="fb5"></div>
+      <div class="fb6"></div>
+      <div></div>
+      <div></div>
+    </div>
+  </body>
+</html>
+```
+
+</section>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-100.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-100.md
index 3c6a3dc2f3..37c1435b26 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-100.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-100.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e992c
+id: 5d822fd413a79914d39e992d
 title: Part 100
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Nest six `div` elements within `fb4b` and give them all a class of `fb4-window`.
+Give the `fb4-window` elements a `width` of `30%`, `height` of `10%`, and `border-radius` of `50%`. These will make some circular windows for this building.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Nest six `div` elements within `fb4b` and give them all a class of `fb4-window`.
 ```yml
 tests:
   - text: test-text
-    testString: assert($(".fb4b").children("div.fb4-window").length === 6);
+    testString: const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/width\s*:\s*30%\s*(;|})/g.test(fb4w) && /height\s*:\s*10%\s*(;|})/g.test(fb4w) && /border-radius\s*:\s*50%\s*(;|})/g.test(fb4w));
 
 ```
 
@@ -290,342 +290,355 @@ tests:
     </style>
   </head>
 
-  <body>
-    <div class="background-buildings">
-      <div></div>
-      <div></div>
-      <div class="bb1 building-wrap">
-        <div class="bb1a bb1-window"></div>
-        <div class="bb1b bb1-window"></div>
-        <div class="bb1c bb1-window"></div>
-        <div class="bb1d"></div>
-      </div>
-      <div class="bb2">
-        <div class="bb2a"></div>
-        <div class="bb2b"></div>
-      </div>
-      <div class="bb3"></div>
-      <div></div>
-      <div class="bb4 building-wrap">
-        <div class="bb4a"></div>
-        <div class="bb4b"></div>
-        <div class="bb4c window-wrap">
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div></div>
-    </div>
-
-    <div class="foreground-buildings">
-      <div></div>
-      <div></div>
-      <div class="fb1 building-wrap">
-        <div class="fb1a"></div>
-        <div class="fb1b"></div>
-        <div class="fb1c"></div>
-      </div>
-      <div class="fb2">
-        <div class="fb2a"></div>
-        <div class="fb2b window-wrap">
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div class="fb3 building-wrap">
-        <div class="fb3a window-wrap">
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-        </div>
-        <div class="fb3b"></div>
-        <div class="fb3a"></div>
-        <div class="fb3b"></div>
-      </div>
-      <div class="fb4">
-        <div class="fb4a"></div>
-        <div class="fb4b"></div>
-      </div>
-      <div class="fb5"></div>
-      <div class="fb6"></div>
-      <div></div>
-      <div></div>
-    </div>
-  </body>
-</html>
-```
-
-</div>
-</section>
-
-
-## Solution
-<section id='solution'>
-
-```html
-<!DOCTYPE html>
-<html>    
-  <head>
-    <title>freeCodeCamp Skyline Project</title>
-    <style>
-      :root {
-        --building-color1: #aa80ff;
-        --building-color2: #66cc99;
-        --building-color3: #cc6699;
-        --building-color4: #538cc6;
-        --window-color1: #bb99ff;
-        --window-color2: #8cd9b3;
-        --window-color3: #d98cb3;
-        --window-color4: #8cb3d9;
-      }
-
-      * {
-        border: 1px solid black;
-        box-sizing: border-box;
-      }
-
-      body {
-        height: 100vh;
-        margin: 0;
-        overflow: hidden;
-      }
-
-      .background-buildings, .foreground-buildings {
-        width: 100%;
-        height: 100%;
-        display: flex;
-        align-items: flex-end;
-        justify-content: space-evenly;
-        position: absolute;
-        top: 0;
-      }
-      
-      .building-wrap {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-      }
-
-      .window-wrap {
-        display: flex;
-        align-items: center;
-        justify-content: space-evenly;
-      }
-
-      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
-      .bb1 {
-        width: 10%;
-        height: 70%;
-      }
-
-      .bb1a {
-        width: 70%;
-      }
-  
-      .bb1b {
-        width: 80%;
-      }
-  
-      .bb1c {
-        width: 90%;
-      }
-
-      .bb1d {
-        width: 100%;
-        height: 70%;
-        background: linear-gradient(
-            var(--building-color1) 50%,
-            var(--window-color1)
-          );
-      }
-
-      .bb1-window {
-        height: 10%;
-        background: linear-gradient(
-            var(--building-color1),
-            var(--window-color1)
-          );
-      }
-
-      .bb2 {
-        width: 10%;
-        height: 50%;
-      }
-
-      .bb2a {
-        border-bottom: 5vh solid var(--building-color2);
-        border-left: 5vw solid transparent;
-        border-right: 5vw solid transparent;
-      }
-
-      .bb2b {
-        width: 100%;
-        height: 100%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 6%,
-            var(--window-color2) 6%,
-            var(--window-color2) 9%
-          );
-      }
-      
-      .bb3 {
-        width: 10%;
-        height: 55%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3),
-            var(--window-color3) 15%
-          );
-      }
-
-      .bb4 {
-        width: 11%;
-        height: 58%;
-      }
-
-      .bb4a {
-        width: 3%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4b {
-        width: 80%;
-        height: 5%;
-        background-color: var(--building-color4);
-      }
-  
-      .bb4c {
-        width: 100%;
-        height: 85%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4-window {
-        width: 18%;
-        height: 90%;
-        background-color: var(--window-color4);
-      }
-
-      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
-      .fb1 {
-        width: 10%;
-        height: 60%;
-      }
-
-      .fb1a {
-        border-bottom: 7vh solid var(--building-color4);
-        border-left: 2vw solid transparent;
-        border-right: 2vw solid transparent;
-      }
-
-      .fb1b {
-        width: 60%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-  
-      .fb1c {
-        width: 100%;
-        height: 80%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color4),
-            var(--building-color4) 10%,
-            transparent 10%,
-            transparent 15%
-          ),
-          repeating-linear-gradient(
-            var(--building-color4),
-            var(--building-color4) 10%,
-            var(--window-color4) 10%,
-            var(--window-color4) 90%
-          );
-      }
-
-      .fb2 {
-        width: 10%;
-        height: 40%;
-      }
-
-      .fb2a {
-        width: 100%;
-        border-bottom: 10vh solid var(--building-color3);
-        border-left: 1vw solid transparent;
-        border-right: 1vw solid transparent;
-      }
-
-      .fb2b {
-        width: 100%;
-        height: 75%;
-        background-color: var(--building-color3);
-      }
-
-      .fb2-window {
-        width: 22%;
-        height: 100%;
-        background-color: var(--window-color3);
-      }
-
-      .fb3 {
-        width: 10%;
-        height: 35%;
-      }
-  
-      .fb3a {
-        width: 80%;
-        height: 15%;
-        background-color: var(--building-color1);
-      }
-  
-      .fb3b {
-        width: 100%;
-        height: 35%;
-        background-color: var(--building-color1);
-      }
-
-      .fb3-window {
-        width: 25%;
-        height: 80%;
-        background-color: var(--window-color1);
-      }
-
-      .fb4 {
-        width: 8%;
-        height: 45%;
-        position: relative;
-        left: 10%;
-      }
-
-      .fb4b {
-        width: 100%;
-        height: 89%;
-        background-color: var(--building-color1);
-      }
-      
-      .fb5 {
-        width: 10%;
-        height: 33%;
-        background-color: var(--building-color2);
-        position: relative;
-        right: 10%;
-      }
-
-      .fb6 {
-        width: 9%;
-        height: 38%;
-        background-color: var(--building-color3);
-      }
-    </style>
-  </head>
-
+  <body>
+    <div class="background-buildings">
+      <div></div>
+      <div></div>
+      <div class="bb1 building-wrap">
+        <div class="bb1a bb1-window"></div>
+        <div class="bb1b bb1-window"></div>
+        <div class="bb1c bb1-window"></div>
+        <div class="bb1d"></div>
+      </div>
+      <div class="bb2">
+        <div class="bb2a"></div>
+        <div class="bb2b"></div>
+      </div>
+      <div class="bb3"></div>
+      <div></div>
+      <div class="bb4 building-wrap">
+        <div class="bb4a"></div>
+        <div class="bb4b"></div>
+        <div class="bb4c window-wrap">
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div></div>
+    </div>
+
+    <div class="foreground-buildings">
+      <div></div>
+      <div></div>
+      <div class="fb1 building-wrap">
+        <div class="fb1a"></div>
+        <div class="fb1b"></div>
+        <div class="fb1c"></div>
+      </div>
+      <div class="fb2">
+        <div class="fb2a"></div>
+        <div class="fb2b window-wrap">
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div class="fb3 building-wrap">
+        <div class="fb3a window-wrap">
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+        </div>
+        <div class="fb3b"></div>
+        <div class="fb3a"></div>
+        <div class="fb3b"></div>
+      </div>
+      <div class="fb4">
+        <div class="fb4a"></div>
+        <div class="fb4b">
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+        </div>
+      </div>
+      <div class="fb5"></div>
+      <div class="fb6"></div>
+      <div></div>
+      <div></div>
+    </div>
+  </body>
+</html>
+```
+
+</div>
+</section>
+
+
+## Solution
+<section id='solution'>
+
+```html
+<!DOCTYPE html>
+<html>    
+  <head>
+    <title>freeCodeCamp Skyline Project</title>
+    <style>
+      :root {
+        --building-color1: #aa80ff;
+        --building-color2: #66cc99;
+        --building-color3: #cc6699;
+        --building-color4: #538cc6;
+        --window-color1: #bb99ff;
+        --window-color2: #8cd9b3;
+        --window-color3: #d98cb3;
+        --window-color4: #8cb3d9;
+      }
+
+      * {
+        border: 1px solid black;
+        box-sizing: border-box;
+      }
+
+      body {
+        height: 100vh;
+        margin: 0;
+        overflow: hidden;
+      }
+
+      .background-buildings, .foreground-buildings {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        align-items: flex-end;
+        justify-content: space-evenly;
+        position: absolute;
+        top: 0;
+      }
+      
+      .building-wrap {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+      }
+
+      .window-wrap {
+        display: flex;
+        align-items: center;
+        justify-content: space-evenly;
+      }
+
+      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
+      .bb1 {
+        width: 10%;
+        height: 70%;
+      }
+
+      .bb1a {
+        width: 70%;
+      }
+  
+      .bb1b {
+        width: 80%;
+      }
+  
+      .bb1c {
+        width: 90%;
+      }
+
+      .bb1d {
+        width: 100%;
+        height: 70%;
+        background: linear-gradient(
+            var(--building-color1) 50%,
+            var(--window-color1)
+          );
+      }
+
+      .bb1-window {
+        height: 10%;
+        background: linear-gradient(
+            var(--building-color1),
+            var(--window-color1)
+          );
+      }
+
+      .bb2 {
+        width: 10%;
+        height: 50%;
+      }
+
+      .bb2a {
+        border-bottom: 5vh solid var(--building-color2);
+        border-left: 5vw solid transparent;
+        border-right: 5vw solid transparent;
+      }
+
+      .bb2b {
+        width: 100%;
+        height: 100%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 6%,
+            var(--window-color2) 6%,
+            var(--window-color2) 9%
+          );
+      }
+      
+      .bb3 {
+        width: 10%;
+        height: 55%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3),
+            var(--window-color3) 15%
+          );
+      }
+
+      .bb4 {
+        width: 11%;
+        height: 58%;
+      }
+
+      .bb4a {
+        width: 3%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4b {
+        width: 80%;
+        height: 5%;
+        background-color: var(--building-color4);
+      }
+  
+      .bb4c {
+        width: 100%;
+        height: 85%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4-window {
+        width: 18%;
+        height: 90%;
+        background-color: var(--window-color4);
+      }
+
+      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
+      .fb1 {
+        width: 10%;
+        height: 60%;
+      }
+
+      .fb1a {
+        border-bottom: 7vh solid var(--building-color4);
+        border-left: 2vw solid transparent;
+        border-right: 2vw solid transparent;
+      }
+
+      .fb1b {
+        width: 60%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+  
+      .fb1c {
+        width: 100%;
+        height: 80%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color4),
+            var(--building-color4) 10%,
+            transparent 10%,
+            transparent 15%
+          ),
+          repeating-linear-gradient(
+            var(--building-color4),
+            var(--building-color4) 10%,
+            var(--window-color4) 10%,
+            var(--window-color4) 90%
+          );
+      }
+
+      .fb2 {
+        width: 10%;
+        height: 40%;
+      }
+
+      .fb2a {
+        width: 100%;
+        border-bottom: 10vh solid var(--building-color3);
+        border-left: 1vw solid transparent;
+        border-right: 1vw solid transparent;
+      }
+
+      .fb2b {
+        width: 100%;
+        height: 75%;
+        background-color: var(--building-color3);
+      }
+
+      .fb2-window {
+        width: 22%;
+        height: 100%;
+        background-color: var(--window-color3);
+      }
+
+      .fb3 {
+        width: 10%;
+        height: 35%;
+      }
+  
+      .fb3a {
+        width: 80%;
+        height: 15%;
+        background-color: var(--building-color1);
+      }
+  
+      .fb3b {
+        width: 100%;
+        height: 35%;
+        background-color: var(--building-color1);
+      }
+
+      .fb3-window {
+        width: 25%;
+        height: 80%;
+        background-color: var(--window-color1);
+      }
+
+      .fb4 {
+        width: 8%;
+        height: 45%;
+        position: relative;
+        left: 10%;
+      }
+
+      .fb4b {
+        width: 100%;
+        height: 89%;
+        background-color: var(--building-color1);
+      }
+      
+      .fb4-window {
+        width: 30%;
+        height: 10%;
+        border-radius: 50%;
+      }
+
+      .fb5 {
+        width: 10%;
+        height: 33%;
+        background-color: var(--building-color2);
+        position: relative;
+        right: 10%;
+      }
+
+      .fb6 {
+        width: 9%;
+        height: 38%;
+        background-color: var(--building-color3);
+      }
+    </style>
+  </head>
+
   <body>
     <div class="background-buildings">
       <div></div>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-101.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-101.md
index a21facf512..ab7242a22b 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-101.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-101.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e992d
+id: 5d822fd413a79914d39e992e
 title: Part 101
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Give the `fb4-window` elements a `width` of `30%`, `height` of `10%`, and `border-radius` of `50%`. These will make some circular windows for this building.
+Fill in the windows with your secondary color for this building. Also add a `margin` of `10%` to give the windows some space.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Give the `fb4-window` elements a `width` of `30%`, `height` of `10%`, and `borde
 ```yml
 tests:
   - text: test-text
-    testString: const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/width\s*:\s*30%\s*(;|})/g.test(fb4w) && /height\s*:\s*10%\s*(;|})/g.test(fb4w) && /border-radius\s*:\s*50%\s*(;|})/g.test(fb4w));
+    testString: const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/background-color\s*:\s*var\(\s*--window-color1\s*\)\s*(;|})/g.test(fb4w) && /margin\s*:\s*10%\s*(;|})/g.test(fb4w));
 
 ```
 
@@ -274,6 +274,12 @@ tests:
         background-color: var(--building-color1);
       }
       
+      .fb4-window {
+        width: 30%;
+        height: 10%;
+        border-radius: 50%;
+      }
+
       .fb5 {
         width: 10%;
         height: 33%;
@@ -621,6 +627,8 @@ tests:
         width: 30%;
         height: 10%;
         border-radius: 50%;
+        background-color: var(--window-color1);
+        margin: 10%;
       }
 
       .fb5 {
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-102.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-102.md
index 20ae907f02..75a6e5b825 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-102.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-102.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e992e
+id: 5d822fd413a79914d39e992f
 title: Part 102
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Fill in the windows with your secondary color for this building. Also add a `margin` of `10%` to give the windows some space.
+Add `display: flex;` and `flex-wrap: wrap;` to the window container. This will put your windows side by side and then push them down to a new row when they don't fit.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Fill in the windows with your secondary color for this building. Also add a `mar
 ```yml
 tests:
   - text: test-text
-    testString: const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/background-color\s*:\s*var\(\s*--window-color1\s*\)\s*(;|})/g.test(fb4w) && /margin\s*:\s*10%\s*(;|})/g.test(fb4w));
+    testString: assert($(".fb4b").css("display") === "flex" && $(".fb4b").css("flex-wrap") === "wrap");
 
 ```
 
@@ -274,355 +274,359 @@ tests:
         background-color: var(--building-color1);
       }
       
-      .fb4-window {
-        width: 30%;
-        height: 10%;
-        border-radius: 50%;
-      }
-
-      .fb5 {
-        width: 10%;
-        height: 33%;
-        background-color: var(--building-color2);
-        position: relative;
-        right: 10%;
-      }
-
-      .fb6 {
-        width: 9%;
-        height: 38%;
-        background-color: var(--building-color3);
-      }
-    </style>
-  </head>
-
-  <body>
-    <div class="background-buildings">
-      <div></div>
-      <div></div>
-      <div class="bb1 building-wrap">
-        <div class="bb1a bb1-window"></div>
-        <div class="bb1b bb1-window"></div>
-        <div class="bb1c bb1-window"></div>
-        <div class="bb1d"></div>
-      </div>
-      <div class="bb2">
-        <div class="bb2a"></div>
-        <div class="bb2b"></div>
-      </div>
-      <div class="bb3"></div>
-      <div></div>
-      <div class="bb4 building-wrap">
-        <div class="bb4a"></div>
-        <div class="bb4b"></div>
-        <div class="bb4c window-wrap">
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div></div>
-    </div>
-
-    <div class="foreground-buildings">
-      <div></div>
-      <div></div>
-      <div class="fb1 building-wrap">
-        <div class="fb1a"></div>
-        <div class="fb1b"></div>
-        <div class="fb1c"></div>
-      </div>
-      <div class="fb2">
-        <div class="fb2a"></div>
-        <div class="fb2b window-wrap">
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div class="fb3 building-wrap">
-        <div class="fb3a window-wrap">
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-        </div>
-        <div class="fb3b"></div>
-        <div class="fb3a"></div>
-        <div class="fb3b"></div>
-      </div>
-      <div class="fb4">
-        <div class="fb4a"></div>
-        <div class="fb4b">
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-        </div>
-      </div>
-      <div class="fb5"></div>
-      <div class="fb6"></div>
-      <div></div>
-      <div></div>
-    </div>
-  </body>
-</html>
-```
-
-</div>
-</section>
-
-
-## Solution
-<section id='solution'>
-
-```html
-<!DOCTYPE html>
-<html>    
-  <head>
-    <title>freeCodeCamp Skyline Project</title>
-    <style>
-      :root {
-        --building-color1: #aa80ff;
-        --building-color2: #66cc99;
-        --building-color3: #cc6699;
-        --building-color4: #538cc6;
-        --window-color1: #bb99ff;
-        --window-color2: #8cd9b3;
-        --window-color3: #d98cb3;
-        --window-color4: #8cb3d9;
-      }
-
-      * {
-        border: 1px solid black;
-        box-sizing: border-box;
-      }
-
-      body {
-        height: 100vh;
-        margin: 0;
-        overflow: hidden;
-      }
-
-      .background-buildings, .foreground-buildings {
-        width: 100%;
-        height: 100%;
-        display: flex;
-        align-items: flex-end;
-        justify-content: space-evenly;
-        position: absolute;
-        top: 0;
-      }
-      
-      .building-wrap {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-      }
-
-      .window-wrap {
-        display: flex;
-        align-items: center;
-        justify-content: space-evenly;
-      }
-
-      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
-      .bb1 {
-        width: 10%;
-        height: 70%;
-      }
-
-      .bb1a {
-        width: 70%;
-      }
-  
-      .bb1b {
-        width: 80%;
-      }
-  
-      .bb1c {
-        width: 90%;
-      }
-
-      .bb1d {
-        width: 100%;
-        height: 70%;
-        background: linear-gradient(
-            var(--building-color1) 50%,
-            var(--window-color1)
-          );
-      }
-
-      .bb1-window {
-        height: 10%;
-        background: linear-gradient(
-            var(--building-color1),
-            var(--window-color1)
-          );
-      }
-
-      .bb2 {
-        width: 10%;
-        height: 50%;
-      }
-
-      .bb2a {
-        border-bottom: 5vh solid var(--building-color2);
-        border-left: 5vw solid transparent;
-        border-right: 5vw solid transparent;
-      }
-
-      .bb2b {
-        width: 100%;
-        height: 100%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 6%,
-            var(--window-color2) 6%,
-            var(--window-color2) 9%
-          );
-      }
-      
-      .bb3 {
-        width: 10%;
-        height: 55%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3),
-            var(--window-color3) 15%
-          );
-      }
-
-      .bb4 {
-        width: 11%;
-        height: 58%;
-      }
-
-      .bb4a {
-        width: 3%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4b {
-        width: 80%;
-        height: 5%;
-        background-color: var(--building-color4);
-      }
-  
-      .bb4c {
-        width: 100%;
-        height: 85%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4-window {
-        width: 18%;
-        height: 90%;
-        background-color: var(--window-color4);
-      }
-
-      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
-      .fb1 {
-        width: 10%;
-        height: 60%;
-      }
-
-      .fb1a {
-        border-bottom: 7vh solid var(--building-color4);
-        border-left: 2vw solid transparent;
-        border-right: 2vw solid transparent;
-      }
-
-      .fb1b {
-        width: 60%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-  
-      .fb1c {
-        width: 100%;
-        height: 80%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color4),
-            var(--building-color4) 10%,
-            transparent 10%,
-            transparent 15%
-          ),
-          repeating-linear-gradient(
-            var(--building-color4),
-            var(--building-color4) 10%,
-            var(--window-color4) 10%,
-            var(--window-color4) 90%
-          );
-      }
-
-      .fb2 {
-        width: 10%;
-        height: 40%;
-      }
-
-      .fb2a {
-        width: 100%;
-        border-bottom: 10vh solid var(--building-color3);
-        border-left: 1vw solid transparent;
-        border-right: 1vw solid transparent;
-      }
-
-      .fb2b {
-        width: 100%;
-        height: 75%;
-        background-color: var(--building-color3);
-      }
-
-      .fb2-window {
-        width: 22%;
-        height: 100%;
-        background-color: var(--window-color3);
-      }
-
-      .fb3 {
-        width: 10%;
-        height: 35%;
-      }
-  
-      .fb3a {
-        width: 80%;
-        height: 15%;
-        background-color: var(--building-color1);
-      }
-  
-      .fb3b {
-        width: 100%;
-        height: 35%;
-        background-color: var(--building-color1);
-      }
-
-      .fb3-window {
-        width: 25%;
-        height: 80%;
-        background-color: var(--window-color1);
-      }
-
-      .fb4 {
-        width: 8%;
-        height: 45%;
-        position: relative;
-        left: 10%;
-      }
-
-      .fb4b {
-        width: 100%;
-        height: 89%;
-        background-color: var(--building-color1);
-      }
-      
+      .fb4-window {
+        width: 30%;
+        height: 10%;
+        border-radius: 50%;
+        background-color: var(--window-color1);
+        margin: 10%;
+      }
+
+      .fb5 {
+        width: 10%;
+        height: 33%;
+        background-color: var(--building-color2);
+        position: relative;
+        right: 10%;
+      }
+
+      .fb6 {
+        width: 9%;
+        height: 38%;
+        background-color: var(--building-color3);
+      }
+    </style>
+  </head>
+
+  <body>
+    <div class="background-buildings">
+      <div></div>
+      <div></div>
+      <div class="bb1 building-wrap">
+        <div class="bb1a bb1-window"></div>
+        <div class="bb1b bb1-window"></div>
+        <div class="bb1c bb1-window"></div>
+        <div class="bb1d"></div>
+      </div>
+      <div class="bb2">
+        <div class="bb2a"></div>
+        <div class="bb2b"></div>
+      </div>
+      <div class="bb3"></div>
+      <div></div>
+      <div class="bb4 building-wrap">
+        <div class="bb4a"></div>
+        <div class="bb4b"></div>
+        <div class="bb4c window-wrap">
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div></div>
+    </div>
+
+    <div class="foreground-buildings">
+      <div></div>
+      <div></div>
+      <div class="fb1 building-wrap">
+        <div class="fb1a"></div>
+        <div class="fb1b"></div>
+        <div class="fb1c"></div>
+      </div>
+      <div class="fb2">
+        <div class="fb2a"></div>
+        <div class="fb2b window-wrap">
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div class="fb3 building-wrap">
+        <div class="fb3a window-wrap">
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+        </div>
+        <div class="fb3b"></div>
+        <div class="fb3a"></div>
+        <div class="fb3b"></div>
+      </div>
+      <div class="fb4">
+        <div class="fb4a"></div>
+        <div class="fb4b">
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+        </div>
+      </div>
+      <div class="fb5"></div>
+      <div class="fb6"></div>
+      <div></div>
+      <div></div>
+    </div>
+  </body>
+</html>
+```
+
+</div>
+</section>
+
+
+## Solution
+<section id='solution'>
+
+```html
+<!DOCTYPE html>
+<html>    
+  <head>
+    <title>freeCodeCamp Skyline Project</title>
+    <style>
+      :root {
+        --building-color1: #aa80ff;
+        --building-color2: #66cc99;
+        --building-color3: #cc6699;
+        --building-color4: #538cc6;
+        --window-color1: #bb99ff;
+        --window-color2: #8cd9b3;
+        --window-color3: #d98cb3;
+        --window-color4: #8cb3d9;
+      }
+
+      * {
+        border: 1px solid black;
+        box-sizing: border-box;
+      }
+
+      body {
+        height: 100vh;
+        margin: 0;
+        overflow: hidden;
+      }
+
+      .background-buildings, .foreground-buildings {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        align-items: flex-end;
+        justify-content: space-evenly;
+        position: absolute;
+        top: 0;
+      }
+      
+      .building-wrap {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+      }
+
+      .window-wrap {
+        display: flex;
+        align-items: center;
+        justify-content: space-evenly;
+      }
+
+      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
+      .bb1 {
+        width: 10%;
+        height: 70%;
+      }
+
+      .bb1a {
+        width: 70%;
+      }
+  
+      .bb1b {
+        width: 80%;
+      }
+  
+      .bb1c {
+        width: 90%;
+      }
+
+      .bb1d {
+        width: 100%;
+        height: 70%;
+        background: linear-gradient(
+            var(--building-color1) 50%,
+            var(--window-color1)
+          );
+      }
+
+      .bb1-window {
+        height: 10%;
+        background: linear-gradient(
+            var(--building-color1),
+            var(--window-color1)
+          );
+      }
+
+      .bb2 {
+        width: 10%;
+        height: 50%;
+      }
+
+      .bb2a {
+        border-bottom: 5vh solid var(--building-color2);
+        border-left: 5vw solid transparent;
+        border-right: 5vw solid transparent;
+      }
+
+      .bb2b {
+        width: 100%;
+        height: 100%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 6%,
+            var(--window-color2) 6%,
+            var(--window-color2) 9%
+          );
+      }
+      
+      .bb3 {
+        width: 10%;
+        height: 55%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3),
+            var(--window-color3) 15%
+          );
+      }
+
+      .bb4 {
+        width: 11%;
+        height: 58%;
+      }
+
+      .bb4a {
+        width: 3%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4b {
+        width: 80%;
+        height: 5%;
+        background-color: var(--building-color4);
+      }
+  
+      .bb4c {
+        width: 100%;
+        height: 85%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4-window {
+        width: 18%;
+        height: 90%;
+        background-color: var(--window-color4);
+      }
+
+      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
+      .fb1 {
+        width: 10%;
+        height: 60%;
+      }
+
+      .fb1a {
+        border-bottom: 7vh solid var(--building-color4);
+        border-left: 2vw solid transparent;
+        border-right: 2vw solid transparent;
+      }
+
+      .fb1b {
+        width: 60%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+  
+      .fb1c {
+        width: 100%;
+        height: 80%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color4),
+            var(--building-color4) 10%,
+            transparent 10%,
+            transparent 15%
+          ),
+          repeating-linear-gradient(
+            var(--building-color4),
+            var(--building-color4) 10%,
+            var(--window-color4) 10%,
+            var(--window-color4) 90%
+          );
+      }
+
+      .fb2 {
+        width: 10%;
+        height: 40%;
+      }
+
+      .fb2a {
+        width: 100%;
+        border-bottom: 10vh solid var(--building-color3);
+        border-left: 1vw solid transparent;
+        border-right: 1vw solid transparent;
+      }
+
+      .fb2b {
+        width: 100%;
+        height: 75%;
+        background-color: var(--building-color3);
+      }
+
+      .fb2-window {
+        width: 22%;
+        height: 100%;
+        background-color: var(--window-color3);
+      }
+
+      .fb3 {
+        width: 10%;
+        height: 35%;
+      }
+  
+      .fb3a {
+        width: 80%;
+        height: 15%;
+        background-color: var(--building-color1);
+      }
+  
+      .fb3b {
+        width: 100%;
+        height: 35%;
+        background-color: var(--building-color1);
+      }
+
+      .fb3-window {
+        width: 25%;
+        height: 80%;
+        background-color: var(--window-color1);
+      }
+
+      .fb4 {
+        width: 8%;
+        height: 45%;
+        position: relative;
+        left: 10%;
+      }
+
+      .fb4b {
+        width: 100%;
+        height: 89%;
+        background-color: var(--building-color1);
+        display: flex;
+        flex-wrap: wrap;
+      }
+      
       .fb4-window {
         width: 30%;
         height: 10%;
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-103.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-103.md
index 750a5ec16a..6df26aa920 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-103.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-103.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e992f
+id: 5d822fd413a79914d39e9930
 title: Part 103
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Add `display: flex;` and `flex-wrap: wrap;` to the window container. This will put your windows side by side and then push them down to a new row when they don't fit.
+This building is going to have another triangle on top. Give the top section a `border-top` of `5vh solid transparent` and a `border-left` that is `8vw`, `solid`, and uses your building color variable as the color.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Add `display: flex;` and `flex-wrap: wrap;` to the window container. This will p
 ```yml
 tests:
   - text: test-text
-    testString: assert($(".fb4b").css("display") === "flex" && $(".fb4b").css("flex-wrap") === "wrap");
+    testString: const fb4a = code.match(/\.fb4a\s*{[\s\S]+?[^}]}/g)[0]; assert(/border-top\s*:\s*5vh\s+solid\s+transparent\s*(;|})/g.test(fb4a) && /border-left\s*:\s*8vw\s+solid\s+var\(\s*--building-color1\s*\)\s*(;|})/g.test(fb4a));
 
 ```
 
@@ -268,357 +268,364 @@ tests:
         left: 10%;
       }
 
-      .fb4b {
-        width: 100%;
-        height: 89%;
-        background-color: var(--building-color1);
-      }
-      
-      .fb4-window {
-        width: 30%;
-        height: 10%;
-        border-radius: 50%;
-        background-color: var(--window-color1);
-        margin: 10%;
-      }
-
-      .fb5 {
-        width: 10%;
-        height: 33%;
-        background-color: var(--building-color2);
-        position: relative;
-        right: 10%;
-      }
-
-      .fb6 {
-        width: 9%;
-        height: 38%;
-        background-color: var(--building-color3);
-      }
-    </style>
-  </head>
-
-  <body>
-    <div class="background-buildings">
-      <div></div>
-      <div></div>
-      <div class="bb1 building-wrap">
-        <div class="bb1a bb1-window"></div>
-        <div class="bb1b bb1-window"></div>
-        <div class="bb1c bb1-window"></div>
-        <div class="bb1d"></div>
-      </div>
-      <div class="bb2">
-        <div class="bb2a"></div>
-        <div class="bb2b"></div>
-      </div>
-      <div class="bb3"></div>
-      <div></div>
-      <div class="bb4 building-wrap">
-        <div class="bb4a"></div>
-        <div class="bb4b"></div>
-        <div class="bb4c window-wrap">
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div></div>
-    </div>
-
-    <div class="foreground-buildings">
-      <div></div>
-      <div></div>
-      <div class="fb1 building-wrap">
-        <div class="fb1a"></div>
-        <div class="fb1b"></div>
-        <div class="fb1c"></div>
-      </div>
-      <div class="fb2">
-        <div class="fb2a"></div>
-        <div class="fb2b window-wrap">
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div class="fb3 building-wrap">
-        <div class="fb3a window-wrap">
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-        </div>
-        <div class="fb3b"></div>
-        <div class="fb3a"></div>
-        <div class="fb3b"></div>
-      </div>
-      <div class="fb4">
-        <div class="fb4a"></div>
-        <div class="fb4b">
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-        </div>
-      </div>
-      <div class="fb5"></div>
-      <div class="fb6"></div>
-      <div></div>
-      <div></div>
-    </div>
-  </body>
-</html>
-```
-
-</div>
-</section>
-
-
-## Solution
-<section id='solution'>
-
-```html
-<!DOCTYPE html>
-<html>    
-  <head>
-    <title>freeCodeCamp Skyline Project</title>
-    <style>
-      :root {
-        --building-color1: #aa80ff;
-        --building-color2: #66cc99;
-        --building-color3: #cc6699;
-        --building-color4: #538cc6;
-        --window-color1: #bb99ff;
-        --window-color2: #8cd9b3;
-        --window-color3: #d98cb3;
-        --window-color4: #8cb3d9;
-      }
-
-      * {
-        border: 1px solid black;
-        box-sizing: border-box;
-      }
-
-      body {
-        height: 100vh;
-        margin: 0;
-        overflow: hidden;
-      }
-
-      .background-buildings, .foreground-buildings {
-        width: 100%;
-        height: 100%;
-        display: flex;
-        align-items: flex-end;
-        justify-content: space-evenly;
-        position: absolute;
-        top: 0;
-      }
-      
-      .building-wrap {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-      }
-
-      .window-wrap {
-        display: flex;
-        align-items: center;
-        justify-content: space-evenly;
-      }
-
-      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
-      .bb1 {
-        width: 10%;
-        height: 70%;
-      }
-
-      .bb1a {
-        width: 70%;
-      }
-  
-      .bb1b {
-        width: 80%;
-      }
-  
-      .bb1c {
-        width: 90%;
-      }
-
-      .bb1d {
-        width: 100%;
-        height: 70%;
-        background: linear-gradient(
-            var(--building-color1) 50%,
-            var(--window-color1)
-          );
-      }
-
-      .bb1-window {
-        height: 10%;
-        background: linear-gradient(
-            var(--building-color1),
-            var(--window-color1)
-          );
-      }
-
-      .bb2 {
-        width: 10%;
-        height: 50%;
-      }
-
-      .bb2a {
-        border-bottom: 5vh solid var(--building-color2);
-        border-left: 5vw solid transparent;
-        border-right: 5vw solid transparent;
-      }
-
-      .bb2b {
-        width: 100%;
-        height: 100%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 6%,
-            var(--window-color2) 6%,
-            var(--window-color2) 9%
-          );
-      }
-      
-      .bb3 {
-        width: 10%;
-        height: 55%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3),
-            var(--window-color3) 15%
-          );
-      }
-
-      .bb4 {
-        width: 11%;
-        height: 58%;
-      }
-
-      .bb4a {
-        width: 3%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4b {
-        width: 80%;
-        height: 5%;
-        background-color: var(--building-color4);
-      }
-  
-      .bb4c {
-        width: 100%;
-        height: 85%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4-window {
-        width: 18%;
-        height: 90%;
-        background-color: var(--window-color4);
-      }
-
-      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
-      .fb1 {
-        width: 10%;
-        height: 60%;
-      }
-
-      .fb1a {
-        border-bottom: 7vh solid var(--building-color4);
-        border-left: 2vw solid transparent;
-        border-right: 2vw solid transparent;
-      }
-
-      .fb1b {
-        width: 60%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-  
-      .fb1c {
-        width: 100%;
-        height: 80%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color4),
-            var(--building-color4) 10%,
-            transparent 10%,
-            transparent 15%
-          ),
-          repeating-linear-gradient(
-            var(--building-color4),
-            var(--building-color4) 10%,
-            var(--window-color4) 10%,
-            var(--window-color4) 90%
-          );
-      }
-
-      .fb2 {
-        width: 10%;
-        height: 40%;
-      }
-
-      .fb2a {
-        width: 100%;
-        border-bottom: 10vh solid var(--building-color3);
-        border-left: 1vw solid transparent;
-        border-right: 1vw solid transparent;
-      }
-
-      .fb2b {
-        width: 100%;
-        height: 75%;
-        background-color: var(--building-color3);
-      }
-
-      .fb2-window {
-        width: 22%;
-        height: 100%;
-        background-color: var(--window-color3);
-      }
-
-      .fb3 {
-        width: 10%;
-        height: 35%;
-      }
-  
-      .fb3a {
-        width: 80%;
-        height: 15%;
-        background-color: var(--building-color1);
-      }
-  
-      .fb3b {
-        width: 100%;
-        height: 35%;
-        background-color: var(--building-color1);
-      }
-
-      .fb3-window {
-        width: 25%;
-        height: 80%;
-        background-color: var(--window-color1);
-      }
-
-      .fb4 {
-        width: 8%;
-        height: 45%;
-        position: relative;
-        left: 10%;
-      }
-
+      .fb4b {
+        width: 100%;
+        height: 89%;
+        background-color: var(--building-color1);
+        display: flex;
+        flex-wrap: wrap;
+      }
+      
+      .fb4-window {
+        width: 30%;
+        height: 10%;
+        border-radius: 50%;
+        background-color: var(--window-color1);
+        margin: 10%;
+      }
+
+      .fb5 {
+        width: 10%;
+        height: 33%;
+        background-color: var(--building-color2);
+        position: relative;
+        right: 10%;
+      }
+
+      .fb6 {
+        width: 9%;
+        height: 38%;
+        background-color: var(--building-color3);
+      }
+    </style>
+  </head>
+
+  <body>
+    <div class="background-buildings">
+      <div></div>
+      <div></div>
+      <div class="bb1 building-wrap">
+        <div class="bb1a bb1-window"></div>
+        <div class="bb1b bb1-window"></div>
+        <div class="bb1c bb1-window"></div>
+        <div class="bb1d"></div>
+      </div>
+      <div class="bb2">
+        <div class="bb2a"></div>
+        <div class="bb2b"></div>
+      </div>
+      <div class="bb3"></div>
+      <div></div>
+      <div class="bb4 building-wrap">
+        <div class="bb4a"></div>
+        <div class="bb4b"></div>
+        <div class="bb4c window-wrap">
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+          <div class="bb4-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div></div>
+    </div>
+
+    <div class="foreground-buildings">
+      <div></div>
+      <div></div>
+      <div class="fb1 building-wrap">
+        <div class="fb1a"></div>
+        <div class="fb1b"></div>
+        <div class="fb1c"></div>
+      </div>
+      <div class="fb2">
+        <div class="fb2a"></div>
+        <div class="fb2b window-wrap">
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+          <div class="fb2-window"></div>
+        </div>
+      </div>
+      <div></div>
+      <div class="fb3 building-wrap">
+        <div class="fb3a window-wrap">
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+          <div class="fb3-window"></div>
+        </div>
+        <div class="fb3b"></div>
+        <div class="fb3a"></div>
+        <div class="fb3b"></div>
+      </div>
+      <div class="fb4">
+        <div class="fb4a"></div>
+        <div class="fb4b">
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+          <div class="fb4-window"></div>
+        </div>
+      </div>
+      <div class="fb5"></div>
+      <div class="fb6"></div>
+      <div></div>
+      <div></div>
+    </div>
+  </body>
+</html>
+```
+
+</div>
+</section>
+
+
+## Solution
+<section id='solution'>
+
+```html
+<!DOCTYPE html>
+<html>    
+  <head>
+    <title>freeCodeCamp Skyline Project</title>
+    <style>
+      :root {
+        --building-color1: #aa80ff;
+        --building-color2: #66cc99;
+        --building-color3: #cc6699;
+        --building-color4: #538cc6;
+        --window-color1: #bb99ff;
+        --window-color2: #8cd9b3;
+        --window-color3: #d98cb3;
+        --window-color4: #8cb3d9;
+      }
+
+      * {
+        border: 1px solid black;
+        box-sizing: border-box;
+      }
+
+      body {
+        height: 100vh;
+        margin: 0;
+        overflow: hidden;
+      }
+
+      .background-buildings, .foreground-buildings {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        align-items: flex-end;
+        justify-content: space-evenly;
+        position: absolute;
+        top: 0;
+      }
+      
+      .building-wrap {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+      }
+
+      .window-wrap {
+        display: flex;
+        align-items: center;
+        justify-content: space-evenly;
+      }
+
+      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
+      .bb1 {
+        width: 10%;
+        height: 70%;
+      }
+
+      .bb1a {
+        width: 70%;
+      }
+  
+      .bb1b {
+        width: 80%;
+      }
+  
+      .bb1c {
+        width: 90%;
+      }
+
+      .bb1d {
+        width: 100%;
+        height: 70%;
+        background: linear-gradient(
+            var(--building-color1) 50%,
+            var(--window-color1)
+          );
+      }
+
+      .bb1-window {
+        height: 10%;
+        background: linear-gradient(
+            var(--building-color1),
+            var(--window-color1)
+          );
+      }
+
+      .bb2 {
+        width: 10%;
+        height: 50%;
+      }
+
+      .bb2a {
+        border-bottom: 5vh solid var(--building-color2);
+        border-left: 5vw solid transparent;
+        border-right: 5vw solid transparent;
+      }
+
+      .bb2b {
+        width: 100%;
+        height: 100%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 6%,
+            var(--window-color2) 6%,
+            var(--window-color2) 9%
+          );
+      }
+      
+      .bb3 {
+        width: 10%;
+        height: 55%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3),
+            var(--window-color3) 15%
+          );
+      }
+
+      .bb4 {
+        width: 11%;
+        height: 58%;
+      }
+
+      .bb4a {
+        width: 3%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4b {
+        width: 80%;
+        height: 5%;
+        background-color: var(--building-color4);
+      }
+  
+      .bb4c {
+        width: 100%;
+        height: 85%;
+        background-color: var(--building-color4);
+      }
+
+      .bb4-window {
+        width: 18%;
+        height: 90%;
+        background-color: var(--window-color4);
+      }
+
+      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
+      .fb1 {
+        width: 10%;
+        height: 60%;
+      }
+
+      .fb1a {
+        border-bottom: 7vh solid var(--building-color4);
+        border-left: 2vw solid transparent;
+        border-right: 2vw solid transparent;
+      }
+
+      .fb1b {
+        width: 60%;
+        height: 10%;
+        background-color: var(--building-color4);
+      }
+  
+      .fb1c {
+        width: 100%;
+        height: 80%;
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color4),
+            var(--building-color4) 10%,
+            transparent 10%,
+            transparent 15%
+          ),
+          repeating-linear-gradient(
+            var(--building-color4),
+            var(--building-color4) 10%,
+            var(--window-color4) 10%,
+            var(--window-color4) 90%
+          );
+      }
+
+      .fb2 {
+        width: 10%;
+        height: 40%;
+      }
+
+      .fb2a {
+        width: 100%;
+        border-bottom: 10vh solid var(--building-color3);
+        border-left: 1vw solid transparent;
+        border-right: 1vw solid transparent;
+      }
+
+      .fb2b {
+        width: 100%;
+        height: 75%;
+        background-color: var(--building-color3);
+      }
+
+      .fb2-window {
+        width: 22%;
+        height: 100%;
+        background-color: var(--window-color3);
+      }
+
+      .fb3 {
+        width: 10%;
+        height: 35%;
+      }
+  
+      .fb3a {
+        width: 80%;
+        height: 15%;
+        background-color: var(--building-color1);
+      }
+  
+      .fb3b {
+        width: 100%;
+        height: 35%;
+        background-color: var(--building-color1);
+      }
+
+      .fb3-window {
+        width: 25%;
+        height: 80%;
+        background-color: var(--window-color1);
+      }
+
+      .fb4 {
+        width: 8%;
+        height: 45%;
+        position: relative;
+        left: 10%;
+      }
+
+      .fb4a {
+        border-top: 5vh solid transparent;
+        border-left: 8vw solid var(--building-color1);
+      }
+
       .fb4b {
         width: 100%;
         height: 89%;
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-104.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-104.md
index 3ac1d63fdc..78606cc967 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-104.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-104.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9930
+id: 5d822fd413a79914d39e9932
 title: Part 104
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-This building is going to have another triangle on top. Give the top section a `border-top` of `5vh solid transparent` and a `border-left` that is `8vw`, `solid`, and uses your building color variable as the color.
+On to the next building! It's the green one in the foreground. Give it a `repeating-linear-gradient` with your building color from `0%` to `5%` and `transparent` from `5%` to `10%`.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ This building is going to have another triangle on top. Give the top section a `
 ```yml
 tests:
   - text: test-text
-    testString: const fb4a = code.match(/\.fb4a\s*{[\s\S]+?[^}]}/g)[0]; assert(/border-top\s*:\s*5vh\s+solid\s+transparent\s*(;|})/g.test(fb4a) && /border-left\s*:\s*8vw\s+solid\s+var\(\s*--building-color1\s*\)\s*(;|})/g.test(fb4a));
+    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*5%\s*,\s*transparent\s*5%\s*,\s*transparent\s*10%\s*\)\s*(;|})/g.test(fb5));
 
 ```
 
@@ -268,6 +268,11 @@ tests:
         left: 10%;
       }
 
+      .fb4a {
+        border-top: 5vh solid transparent;
+        border-left: 8vw solid var(--building-color1);
+      }
+
       .fb4b {
         width: 100%;
         height: 89%;
@@ -648,6 +653,12 @@ tests:
         background-color: var(--building-color2);
         position: relative;
         right: 10%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 5%,
+            transparent 5%,
+            transparent 10%
+          )
       }
 
       .fb6 {
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-119.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-105.md
similarity index 85%
rename from curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-119.md
rename to curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-105.md
index 6a4804016c..6d394da9d1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-119.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-105.md
@@ -1,6 +1,6 @@
 ---
-id: 5d822fd413a79914d39e993d
-title: Part 119
+id: 5d822fd413a79914d39e9933
+title: Part 105
 challengeType: 0
 isHidden: true
 ---
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Add a `:root` selector to the top of your media query. Then redefine all four of the `--building-color` variables to use the value `#000` there.
+Add another `repeating-linear-gradient` below the one you just added. Give it a `90deg` direction, use your building color from `0%` to `12%` and window color `12%` to `44%`. This will make a bunch of rectangle windows.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Add a `:root` selector to the top of your media query. Then redefine all four of
 ```yml
 tests:
   - text: test-text
-    testString: const root = code.match(/:root\s*{[\s\S]+?[^}]}/g)[1]; assert(/--building-color1\s*:\s*#000\s*(;|})/g.test(root) && /--building-color2\s*:\s*#000\s*(;|})/g.test(root) && /--building-color3\s*:\s*#000\s*(;|})/g.test(root) && /--building-color4\s*:\s*#000\s*(;|})/g.test(root));
+    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*5%\s*,\s*transparent\s*5%\s*,\s*transparent\s*10%\s*\)\s*,\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*12%\s*,\s*var\(\s*--window-color2\s*\)\s*12%\s*,\s*var\(\s*--window-color2\s*\)\s*44%\s*\)\s*(;|})/g.test(fb5));
 
 ```
 
@@ -49,6 +49,7 @@ tests:
       }
 
       * {
+        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -80,16 +81,6 @@ tests:
         justify-content: space-evenly;
       }
 
-      .sky {
-        background: radial-gradient(
-            closest-corner circle at 15% 15%,
-            #ffcf33,
-            #ffcf33 20%,
-            #ffff66 21%,
-            #bbeeff 100%
-          );
-      }
-
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
@@ -301,6 +292,7 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
+        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -308,50 +300,19 @@ tests:
             var(--building-color2) 5%,
             transparent 5%,
             transparent 10%
-          ),
-          repeating-linear-gradient(
-            90deg,
-            var(--building-color2),
-            var(--building-color2) 12%,
-            var(--window-color2) 12%,
-            var(--window-color2) 44%
-          );
+          )
       }
 
       .fb6 {
         width: 9%;
         height: 38%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3) 10%,
-            transparent 10%,
-            transparent 30%
-          ),
-          repeating-linear-gradient(
-            var(--building-color3),
-            var(--building-color3) 10%,
-            var(--window-color3) 10%,
-            var(--window-color3) 30%
-          );
-      }
-
-      @media (max-width: 1000px) {
-        .sky {
-          background: radial-gradient(
-              closest-corner circle at 15% 15%,
-              #ccc,
-              #ccc 20%,
-              #445 21%,
-              #223 100%
-            );
-        }
+        background-color: var(--building-color3);
       }
     </style>
   </head>
 
   <body>
-    <div class="background-buildings sky">
+    <div class="background-buildings">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
@@ -452,6 +413,7 @@ tests:
       }
 
       * {
+        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -483,16 +445,6 @@ tests:
         justify-content: space-evenly;
       }
 
-      .sky {
-        background: radial-gradient(
-            closest-corner circle at 15% 15%,
-            #ffcf33,
-            #ffcf33 20%,
-            #ffff66 21%,
-            #bbeeff 100%
-          );
-      }
-
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
@@ -704,6 +656,7 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
+        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -724,44 +677,13 @@ tests:
       .fb6 {
         width: 9%;
         height: 38%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3) 10%,
-            transparent 10%,
-            transparent 30%
-          ),
-          repeating-linear-gradient(
-            var(--building-color3),
-            var(--building-color3) 10%,
-            var(--window-color3) 10%,
-            var(--window-color3) 30%
-          );
-      }
-
-      @media (max-width: 1000px) {
-        :root {
-          --building-color1: #000;
-          --building-color2: #000;
-          --building-color3: #000;
-          --building-color4: #000;
-        }
-
-        .sky {
-          background: radial-gradient(
-              closest-corner circle at 15% 15%,
-              #ccc,
-              #ccc 20%,
-              #445 21%,
-              #223 100%
-            );
-        }
+        background-color: var(--building-color3);
       }
     </style>
   </head>
 
   <body>
-    <div class="background-buildings sky">
+    <div class="background-buildings">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-106.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-106.md
index 9d0592d568..f89f034bdf 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-106.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-106.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9932
+id: 5d822fd413a79914d39e9915
 title: Part 106
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-On to the next building! It's the green one in the foreground. Give it a `repeating-linear-gradient` with your building color from `0%` to `5%` and `transparent` from `5%` to `10%`.
+You don't need the `background-color` for this building anymore so you can remove that property.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ On to the next building! It's the green one in the foreground. Give it a `repeat
 ```yml
 tests:
   - text: test-text
-    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*5%\s*,\s*transparent\s*5%\s*,\s*transparent\s*10%\s*\)\s*(;|})/g.test(fb5));
+    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(!/background-color/g.test(fb5));
 
 ```
 
@@ -295,6 +295,19 @@ tests:
         background-color: var(--building-color2);
         position: relative;
         right: 10%;
+        background: repeating-linear-gradient(
+            var(--building-color2),
+            var(--building-color2) 5%,
+            transparent 5%,
+            transparent 10%
+          ),
+          repeating-linear-gradient(
+            90deg,
+            var(--building-color2),
+            var(--building-color2) 12%,
+            var(--window-color2) 12%,
+            var(--window-color2) 44%
+          );
       }
 
       .fb6 {
@@ -650,7 +663,6 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
-        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -658,7 +670,14 @@ tests:
             var(--building-color2) 5%,
             transparent 5%,
             transparent 10%
-          )
+          ),
+          repeating-linear-gradient(
+            90deg,
+            var(--building-color2),
+            var(--building-color2) 12%,
+            var(--window-color2) 12%,
+            var(--window-color2) 44%
+          );
       }
 
       .fb6 {
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-107.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-107.md
index 25de59cc56..ee4f03b78a 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-107.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-107.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9933
+id: 5d822fd413a79914d39e9934
 title: Part 107
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Add another `repeating-linear-gradient` below the one you just added. Give it a `90deg` direction, use your building color from `0%` to `12%` and window color `12%` to `44%`. This will make a bunch of rectangle windows.
+Finally! You made it to the last building! Add a repeating gradient to it with a `90deg` direction. Use the building color from `0%` to `10%` and `transparent` from `10%` to `30%`.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Add another `repeating-linear-gradient` below the one you just added. Give it a
 ```yml
 tests:
   - text: test-text
-    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*5%\s*,\s*transparent\s*5%\s*,\s*transparent\s*10%\s*\)\s*,\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color2\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color2\s*\)\s*12%\s*,\s*var\(\s*--window-color2\s*\)\s*12%\s*,\s*var\(\s*--window-color2\s*\)\s*44%\s*\)\s*(;|})/g.test(fb5));
+    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*transparent\s*10%\s*,\s*transparent\s*30%\s*\)\s*(;|})/g.test(fb6));
 
 ```
 
@@ -292,7 +292,6 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
-        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -300,7 +299,14 @@ tests:
             var(--building-color2) 5%,
             transparent 5%,
             transparent 10%
-          )
+          ),
+          repeating-linear-gradient(
+            90deg,
+            var(--building-color2),
+            var(--building-color2) 12%,
+            var(--window-color2) 12%,
+            var(--window-color2) 44%
+          );
       }
 
       .fb6 {
@@ -656,7 +662,6 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
-        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -678,6 +683,13 @@ tests:
         width: 9%;
         height: 38%;
         background-color: var(--building-color3);
+        background: repeating-linear-gradient(
+          90deg,
+          var(--building-color3),
+          var(--building-color3) 10%,
+          transparent 10%,
+          transparent 30%
+        )
       }
     </style>
   </head>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-108.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-108.md
index f6ff8e66b7..a81ec03c3c 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-108.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-108.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9915
+id: 5d822fd413a79914d39e9935
 title: Part 108
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-You don't need the `background-color` for this building anymore so you can remove that property.
+Add another repeating gradient to this building; make it the same as the one you just added, except don't add the `90deg` direction and use your window color instead of the two `transparent` colors.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ You don't need the `background-color` for this building anymore so you can remov
 ```yml
 tests:
   - text: test-text
-    testString: const fb5 = code.match(/\.fb5\s*{[\s\S]+?[^}]}/g)[0]; assert(!/background-color/g.test(fb5));
+    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*transparent\s*10%\s*,\s*transparent\s*30%\s*\)\s*,\s*repeating-linear-gradient\(\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*var\(\s*--window-color3\s*\)\s*10%\s*,\s*var\(\s*--window-color3\s*\)\s*30%\s*\)\s*(;|})/g.test(fb6));
 
 ```
 
@@ -292,7 +292,6 @@ tests:
       .fb5 {
         width: 10%;
         height: 33%;
-        background-color: var(--building-color2);
         position: relative;
         right: 10%;
         background: repeating-linear-gradient(
@@ -314,6 +313,13 @@ tests:
         width: 9%;
         height: 38%;
         background-color: var(--building-color3);
+        background: repeating-linear-gradient(
+          90deg,
+          var(--building-color3),
+          var(--building-color3) 10%,
+          transparent 10%,
+          transparent 30%
+        )
       }
     </style>
   </head>
@@ -684,6 +690,19 @@ tests:
         width: 9%;
         height: 38%;
         background-color: var(--building-color3);
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3) 10%,
+            transparent 10%,
+            transparent 30%
+          ),
+          repeating-linear-gradient(
+            var(--building-color3),
+            var(--building-color3) 10%,
+            var(--window-color3) 10%,
+            var(--window-color3) 30%
+          );
       }
     </style>
   </head>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-109.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-109.md
index c37b7816ee..7899bcc5f6 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-109.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-109.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9934
+id: 5d822fd413a79914d39e9931
 title: Part 109
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Finally! You made it to the last building! Add a repeating gradient to it with a `90deg` direction. Use the building color from `0%` to `10%` and `transparent` from `10%` to `30%`.
+You can remove the `background-color` for this building now, since it isn't needed.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Finally! You made it to the last building! Add a repeating gradient to it with a
 ```yml
 tests:
   - text: test-text
-    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*transparent\s*10%\s*,\s*transparent\s*30%\s*\)\s*(;|})/g.test(fb6));
+    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(!/background-color/g.test(fb6));
 
 ```
 
@@ -313,6 +313,19 @@ tests:
         width: 9%;
         height: 38%;
         background-color: var(--building-color3);
+        background: repeating-linear-gradient(
+            90deg,
+            var(--building-color3),
+            var(--building-color3) 10%,
+            transparent 10%,
+            transparent 30%
+          ),
+          repeating-linear-gradient(
+            var(--building-color3),
+            var(--building-color3) 10%,
+            var(--window-color3) 10%,
+            var(--window-color3) 30%
+          );
       }
     </style>
   </head>
@@ -682,14 +695,19 @@ tests:
       .fb6 {
         width: 9%;
         height: 38%;
-        background-color: var(--building-color3);
         background: repeating-linear-gradient(
-          90deg,
-          var(--building-color3),
-          var(--building-color3) 10%,
-          transparent 10%,
-          transparent 30%
-        )
+            90deg,
+            var(--building-color3),
+            var(--building-color3) 10%,
+            transparent 10%,
+            transparent 30%
+          ),
+          repeating-linear-gradient(
+            var(--building-color3),
+            var(--building-color3) 10%,
+            var(--window-color3) 10%,
+            var(--window-color3) 30%
+          );
       }
     </style>
   </head>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-110.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-110.md
index 23904018c2..6836813fb1 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-110.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-110.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9935
+id: 5d822fd413a79914d39e9936
 title: Part 110
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Add another repeating gradient to this building; make it the same as the one you just added, except don't add the `90deg` direction and use your window color instead of the two `transparent` colors.
+Okay, the buildings are done. Go back to the `*` selector and remove the border you applied to everything at the beginning and the buildings will come together.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Add another repeating gradient to this building; make it the same as the one you
 ```yml
 tests:
   - text: test-text
-    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*repeating-linear-gradient\(\s*90deg\s*,\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*transparent\s*10%\s*,\s*transparent\s*30%\s*\)\s*,\s*repeating-linear-gradient\(\s*var\(\s*--building-color3\s*\)\s*(0%\s*,|,)\s*var\(\s*--building-color3\s*\)\s*10%\s*,\s*var\(\s*--window-color3\s*\)\s*10%\s*,\s*var\(\s*--window-color3\s*\)\s*30%\s*\)\s*(;|})/g.test(fb6));
+    testString: const all = code.match(/\*\s*{[\s\S]+?[^}]}/g)[0]; assert(!/border\s*:\s*1px\s+solid\s+black/g.test(all));
 
 ```
 
@@ -312,14 +312,19 @@ tests:
       .fb6 {
         width: 9%;
         height: 38%;
-        background-color: var(--building-color3);
         background: repeating-linear-gradient(
-          90deg,
-          var(--building-color3),
-          var(--building-color3) 10%,
-          transparent 10%,
-          transparent 30%
-        )
+            90deg,
+            var(--building-color3),
+            var(--building-color3) 10%,
+            transparent 10%,
+            transparent 30%
+          ),
+          repeating-linear-gradient(
+            var(--building-color3),
+            var(--building-color3) 10%,
+            var(--window-color3) 10%,
+            var(--window-color3) 30%
+          );
       }
     </style>
   </head>
@@ -426,7 +431,6 @@ tests:
       }
 
       * {
-        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -689,7 +693,6 @@ tests:
       .fb6 {
         width: 9%;
         height: 38%;
-        background-color: var(--building-color3);
         background: repeating-linear-gradient(
             90deg,
             var(--building-color3),
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-111.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-111.md
index 13b11fff4c..9d205afdd0 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-111.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-111.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9931
+id: 5d822fd413a79914d39e9937
 title: Part 111
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-You can remove the `background-color` for this building now, since it isn't needed.
+Add `sky` as a second class to the `background-buildings` element. You are going to make a background for the skyline.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ You can remove the `background-color` for this building now, since it isn't need
 ```yml
 tests:
   - text: test-text
-    testString: const fb6 = code.match(/\.fb6\s*{[\s\S]+?[^}]}/g)[0]; assert(!/background-color/g.test(fb6));
+    testString: assert($(".background-buildings.sky").length === 1);
 
 ```
 
@@ -49,7 +49,6 @@ tests:
       }
 
       * {
-        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -312,7 +311,6 @@ tests:
       .fb6 {
         width: 9%;
         height: 38%;
-        background-color: var(--building-color3);
         background: repeating-linear-gradient(
             90deg,
             var(--building-color3),
@@ -432,7 +430,6 @@ tests:
       }
 
       * {
-        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -713,7 +710,7 @@ tests:
   </head>
 
   <body>
-    <div class="background-buildings">
+    <div class="background-buildings sky">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-112.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-112.md
index 0e6e02468f..994d60ef3d 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-112.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-112.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9936
+id: 5d822fd413a79914d39e9938
 title: Part 112
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Okay, the buildings are done. Go back to the `*` selector and remove the border you applied to everything at the beginning and the buildings will come together.
+Give the `sky` class a `radial-gradient`. Use `#ffcf33` from `0%` to `20%`, `#ffff66` at `21%`, and `#bbeeff` at `100%`. This will add circular gradient to the background that will be your sun.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Okay, the buildings are done. Go back to the `*` selector and remove the border
 ```yml
 tests:
   - text: test-text
-    testString: const all = code.match(/\*\s*{[\s\S]+?[^}]}/g)[0]; assert(!/border\s*:\s*1px\s+solid\s+black/g.test(all));
+    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*radial-gradient\(\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
 
 ```
 
@@ -49,7 +49,6 @@ tests:
       }
 
       * {
-        border: 1px solid black;
         box-sizing: border-box;
       }
 
@@ -330,7 +329,7 @@ tests:
   </head>
 
   <body>
-    <div class="background-buildings">
+    <div class="background-buildings sky">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
@@ -462,6 +461,15 @@ tests:
         justify-content: space-evenly;
       }
 
+      .sky {
+        background: radial-gradient(
+            #ffcf33,
+            #ffcf33 20%,
+            #ffff66 21%,
+            #bbeeff 100%
+          );
+      }
+
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
@@ -711,7 +719,7 @@ tests:
   </head>
 
   <body>
-    <div class="background-buildings">
+    <div class="background-buildings sky">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-113.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-113.md
index aa1d70639b..e2fa351542 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-113.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-113.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9937
+id: 5d822fd413a79914d39e9939
 title: Part 113
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Add `sky` as a second class to the `background-buildings` element. You are going to make a background for the skyline.
+At the top of the sky gradient color list, where you would put a direction for the gradient; add `closest-corner circle at 15% 15%,`. This will move the start of the gradient to `15%` from the top and left. It will make it end at the `closest-corner` and it will maintain a `circle` shape. These are some keywords built into gradients to describe how it behaves.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Add `sky` as a second class to the `background-buildings` element. You are going
 ```yml
 tests:
   - text: test-text
-    testString: assert($(".background-buildings.sky").length === 1);
+    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
 
 ```
 
@@ -80,6 +80,15 @@ tests:
         justify-content: space-evenly;
       }
 
+      .sky {
+        background: radial-gradient(
+            #ffcf33,
+            #ffcf33 20%,
+            #ffff66 21%,
+            #bbeeff 100%
+          );
+      }
+
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
@@ -329,7 +338,7 @@ tests:
   </head>
 
   <body>
-    <div class="background-buildings">
+    <div class="background-buildings sky">
       <div></div>
       <div></div>
       <div class="bb1 building-wrap">
@@ -461,6 +470,16 @@ tests:
         justify-content: space-evenly;
       }
 
+      .sky {
+        background: radial-gradient(
+            closest-corner circle at 15% 15%,
+            #ffcf33,
+            #ffcf33 20%,
+            #ffff66 21%,
+            #bbeeff 100%
+          );
+      }
+
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-114.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-114.md
index c8ede68b60..4ba2272018 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-114.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-114.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9938
+id: 5d822fd413a79914d39e993a
 title: Part 114
 challengeType: 0
 isHidden: true
@@ -7,8 +7,15 @@ isHidden: true
 
 ## Description
 <section id='description'>
+A media query can be used to change styles based on certain conditions, and they look like this:
 
-Give the `sky` class a `radial-gradient`. Use `#ffcf33` from `0%` to `20%`, `#ffff66` at `21%`, and `#bbeeff` at `100%`. This will add circular gradient to the background that will be your sun.
+```css
+@media (condition) {
+
+}  
+```
+
+Add an empty media query at the bottom of your stylesheet with a condition of `max-width: 1000px`. Styles added in here will take effect when the document size is 1000px wide or less.
 </section>
 
 ## Instructions
@@ -21,7 +28,7 @@ Give the `sky` class a `radial-gradient`. Use `#ffcf33` from `0%` to `20%`, `#ff
 ```yml
 tests:
   - text: test-text
-    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*radial-gradient\(\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
+    testString: assert(/\@media\s*\(\s*max-width\s*:\s*1000px\s*\)\s*{\s*}/g.test(code));
 
 ```
 
@@ -80,6 +87,16 @@ tests:
         justify-content: space-evenly;
       }
 
+      .sky {
+        background: radial-gradient(
+            closest-corner circle at 15% 15%,
+            #ffcf33,
+            #ffcf33 20%,
+            #ffff66 21%,
+            #bbeeff 100%
+          );
+      }
+
       /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
       .bb1 {
         width: 10%;
@@ -463,6 +480,7 @@ tests:
 
       .sky {
         background: radial-gradient(
+            closest-corner circle at 15% 15%,
             #ffcf33,
             #ffcf33 20%,
             #ffff66 21%,
@@ -715,6 +733,10 @@ tests:
             var(--window-color3) 30%
           );
       }
+
+      @media (max-width: 1000px) {
+        
+      }
     </style>
   </head>
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-115.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-115.md
index 0fc038f0dc..3bdae221aa 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-115.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-115.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e9939
+id: 5d822fd413a79914d39e993b
 title: Part 115
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-At the top of the sky gradient color list, where you would put a direction for the gradient; add `closest-corner circle at 15% 15%,`. This will move the start of the gradient to `15%` from the top and left. It will make it end at the `closest-corner` and it will maintain a `circle` shape. These are some keywords built into gradients to describe how it behaves.
+Copy and paste your whole `sky` class along with all of its properties and values into the media query. You are going to make another color scheme for the skyline that changes it from day to night.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ At the top of the sky gradient color list, where you would put a direction for t
 ```yml
 tests:
   - text: test-text
-    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[0]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
+    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[1]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
 
 ```
 
@@ -82,6 +82,7 @@ tests:
 
       .sky {
         background: radial-gradient(
+            closest-corner circle at 15% 15%,
             #ffcf33,
             #ffcf33 20%,
             #ffff66 21%,
@@ -334,6 +335,10 @@ tests:
             var(--window-color3) 30%
           );
       }
+
+      @media (max-width: 1000px) {
+        
+      }
     </style>
   </head>
 
@@ -725,6 +730,18 @@ tests:
             var(--window-color3) 30%
           );
       }
+
+      @media (max-width: 1000px) {
+        .sky {
+          background: radial-gradient(
+              closest-corner circle at 15% 15%,
+              #ffcf33,
+              #ffcf33 20%,
+              #ffff66 21%,
+              #bbeeff 100%
+            );
+        }
+      }
     </style>
   </head>
 
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-116.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-116.md
index 5984f40854..3ac4ae1a54 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-116.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-116.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e993a
+id: 5d822fd413a79914d39e993c
 title: Part 116
 challengeType: 0
 isHidden: true
@@ -7,15 +7,8 @@ isHidden: true
 
 ## Description
 <section id='description'>
-A media query can be used to change styles based on certain conditions, and they look like this:
 
-```css
-@media (condition) {
-
-}  
-```
-
-Add an empty media query at the bottom of your stylesheet with a condition of `max-width: 1000px`. Styles added in here will take effect when the document size is 1000px wide or less.
+In the `sky` class of the media query, change the two `#ffcf33` color values to `#ccc`, the `#ffff66` to `#445`, and the `#bbeeff` to `#223`. Then you can resize your window to see the background change colors.
 </section>
 
 ## Instructions
@@ -28,7 +21,7 @@ Add an empty media query at the bottom of your stylesheet with a condition of `m
 ```yml
 tests:
   - text: test-text
-    testString: assert(/\@media\s*\(\s*max-width\s*:\s*1000px\s*\)\s*{\s*}/g.test(code));
+    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[1]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ccc\s*(0%\s*,|,)\s*#ccc\s*20%\s*,\s*#445\s*21%\s*,\s*#223\s*100%\s*\)\s*(;|})/g.test(sky));
 
 ```
 
@@ -342,6 +335,18 @@ tests:
             var(--window-color3) 30%
           );
       }
+
+      @media (max-width: 1000px) {
+        .sky {
+          background: radial-gradient(
+              closest-corner circle at 15% 15%,
+              #ffcf33,
+              #ffcf33 20%,
+              #ffff66 21%,
+              #bbeeff 100%
+            );
+        }
+      }
     </style>
   </head>
 
@@ -735,7 +740,15 @@ tests:
       }
 
       @media (max-width: 1000px) {
-        
+        .sky {
+          background: radial-gradient(
+              closest-corner circle at 15% 15%,
+              #ccc,
+              #ccc 20%,
+              #445 21%,
+              #223 100%
+            );
+        }
       }
     </style>
   </head>
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-117.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-117.md
index f9c6867dfc..aa8cae6f37 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-117.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-117.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e993b
+id: 5d822fd413a79914d39e993d
 title: Part 117
 challengeType: 0
 isHidden: true
@@ -8,7 +8,7 @@ isHidden: true
 ## Description
 <section id='description'>
 
-Copy and paste your whole `sky` class along with all of its properties and values into the media query. You are going to make another color scheme for the skyline that changes it from day to night.
+Add a `:root` selector to the top of your media query. Then redefine all four of the `--building-color` variables to use the value `#000` there.
 </section>
 
 ## Instructions
@@ -21,7 +21,7 @@ Copy and paste your whole `sky` class along with all of its properties and value
 ```yml
 tests:
   - text: test-text
-    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[1]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ffcf33\s*(0%\s*,|,)\s*#ffcf33\s*20%\s*,\s*#ffff66\s*21%\s*,\s*#bbeeff\s*100%\s*\)\s*(;|})/g.test(sky));
+    testString: const root = code.match(/:root\s*{[\s\S]+?[^}]}/g)[1]; assert(/--building-color1\s*:\s*#000\s*(;|})/g.test(root) && /--building-color2\s*:\s*#000\s*(;|})/g.test(root) && /--building-color3\s*:\s*#000\s*(;|})/g.test(root) && /--building-color4\s*:\s*#000\s*(;|})/g.test(root));
 
 ```
 
@@ -337,7 +337,15 @@ tests:
       }
 
       @media (max-width: 1000px) {
-        
+        .sky {
+          background: radial-gradient(
+              closest-corner circle at 15% 15%,
+              #ccc,
+              #ccc 20%,
+              #445 21%,
+              #223 100%
+            );
+        }
       }
     </style>
   </head>
@@ -732,13 +740,20 @@ tests:
       }
 
       @media (max-width: 1000px) {
+        :root {
+          --building-color1: #000;
+          --building-color2: #000;
+          --building-color3: #000;
+          --building-color4: #000;
+        }
+
         .sky {
           background: radial-gradient(
               closest-corner circle at 15% 15%,
-              #ffcf33,
-              #ffcf33 20%,
-              #ffff66 21%,
-              #bbeeff 100%
+              #ccc,
+              #ccc 20%,
+              #445 21%,
+              #223 100%
             );
         }
       }
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-118.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-118.md
index 04c8dddb67..9430024753 100644
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-118.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-118.md
@@ -1,5 +1,5 @@
 ---
-id: 5d822fd413a79914d39e993c
+id: 5d822fd413a79914d39e993e
 title: Part 118
 challengeType: 0
 isHidden: true
@@ -8,7 +8,9 @@ isHidden: true
 ## Description
 <section id='description'>
 
-In the `sky` class of the media query, change the two `#ffcf33` color values to `#ccc`, the `#ffff66` to `#445`, and the `#bbeeff` to `#223`. Then you can resize your window to see the background change colors.
+Lastly, in the `:root` selector of the media query, redefine all four of the `--window-color` variables to use `#777`. When you're done, resize the window and watch it go from day to night.
+
+Variables are primarily used with colors, and that's how you used them here. But they can be given any value and used on any property. Your project looks great!
 </section>
 
 ## Instructions
@@ -21,7 +23,7 @@ In the `sky` class of the media query, change the two `#ffcf33` color values to
 ```yml
 tests:
   - text: test-text
-    testString: const sky = code.match(/\.sky\s*{[\s\S]+?[^}]}/g)[1]; assert(/background\s*:\s*radial-gradient\(\s*closest-corner\s+circle\s+at\s+15%\s+15%\s*,\s*#ccc\s*(0%\s*,|,)\s*#ccc\s*20%\s*,\s*#445\s*21%\s*,\s*#223\s*100%\s*\)\s*(;|})/g.test(sky));
+    testString: const root = code.match(/:root\s*{[\s\S]+?[^}]}/g)[1]; assert(/--window-color1\s*:\s*#777\s*(;|})/g.test(root) && /--window-color2\s*:\s*#777\s*(;|})/g.test(root) && /--window-color3\s*:\s*#777\s*(;|})/g.test(root) && /--window-color4\s*:\s*#777\s*(;|})/g.test(root));
 
 ```
 
@@ -337,13 +339,20 @@ tests:
       }
 
       @media (max-width: 1000px) {
+        :root {
+          --building-color1: #000;
+          --building-color2: #000;
+          --building-color3: #000;
+          --building-color4: #000;
+        }
+
         .sky {
           background: radial-gradient(
               closest-corner circle at 15% 15%,
-              #ffcf33,
-              #ffcf33 20%,
-              #ffff66 21%,
-              #bbeeff 100%
+              #ccc,
+              #ccc 20%,
+              #445 21%,
+              #223 100%
             );
         }
       }
@@ -740,6 +749,17 @@ tests:
       }
 
       @media (max-width: 1000px) {
+        :root {
+          --building-color1: #000;
+          --building-color2: #000;
+          --building-color3: #000;
+          --building-color4: #000;
+          --window-color1: #777;
+          --window-color2: #777;
+          --window-color3: #777;
+          --window-color4: #777;
+        }
+
         .sky {
           background: radial-gradient(
               closest-corner circle at 15% 15%,
diff --git a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-120.md b/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-120.md
deleted file mode 100644
index 4f45b0343e..0000000000
--- a/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-120.md
+++ /dev/null
@@ -1,853 +0,0 @@
----
-id: 5d822fd413a79914d39e993e
-title: Part 120
-challengeType: 0
-isHidden: true
----
-
-## Description
-<section id='description'>
-
-Lastly, in the `:root` selector of the media query, redefine all four of the `--window-color` variables to use `#777`. When you're done, resize the window and watch it go from day to night.
-
-Variables are primarily used with colors, and that's how you used them here. But they can be given any value and used on any property. Your project looks great!
-</section>
-
-## Instructions
-<section id='instructions'>
-</section>
-
-## Tests
-<section id='tests'>
-
-```yml
-tests:
-  - text: test-text
-    testString: const root = code.match(/:root\s*{[\s\S]+?[^}]}/g)[1]; assert(/--window-color1\s*:\s*#777\s*(;|})/g.test(root) && /--window-color2\s*:\s*#777\s*(;|})/g.test(root) && /--window-color3\s*:\s*#777\s*(;|})/g.test(root) && /--window-color4\s*:\s*#777\s*(;|})/g.test(root));
-
-```
-
-</section>
-
-## Challenge Seed
-<section id='challengeSeed'>
-<div id='html-seed'>
-
-```html
-<!DOCTYPE html>
-<html>    
-  <head>
-    <title>freeCodeCamp Skyline Project</title>
-    <style>
-      :root {
-        --building-color1: #aa80ff;
-        --building-color2: #66cc99;
-        --building-color3: #cc6699;
-        --building-color4: #538cc6;
-        --window-color1: #bb99ff;
-        --window-color2: #8cd9b3;
-        --window-color3: #d98cb3;
-        --window-color4: #8cb3d9;
-      }
-
-      * {
-        box-sizing: border-box;
-      }
-
-      body {
-        height: 100vh;
-        margin: 0;
-        overflow: hidden;
-      }
-
-      .background-buildings, .foreground-buildings {
-        width: 100%;
-        height: 100%;
-        display: flex;
-        align-items: flex-end;
-        justify-content: space-evenly;
-        position: absolute;
-        top: 0;
-      }
-      
-      .building-wrap {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-      }
-
-      .window-wrap {
-        display: flex;
-        align-items: center;
-        justify-content: space-evenly;
-      }
-
-      .sky {
-        background: radial-gradient(
-            closest-corner circle at 15% 15%,
-            #ffcf33,
-            #ffcf33 20%,
-            #ffff66 21%,
-            #bbeeff 100%
-          );
-      }
-
-      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
-      .bb1 {
-        width: 10%;
-        height: 70%;
-      }
-
-      .bb1a {
-        width: 70%;
-      }
-  
-      .bb1b {
-        width: 80%;
-      }
-  
-      .bb1c {
-        width: 90%;
-      }
-
-      .bb1d {
-        width: 100%;
-        height: 70%;
-        background: linear-gradient(
-            var(--building-color1) 50%,
-            var(--window-color1)
-          );
-      }
-
-      .bb1-window {
-        height: 10%;
-        background: linear-gradient(
-            var(--building-color1),
-            var(--window-color1)
-          );
-      }
-
-      .bb2 {
-        width: 10%;
-        height: 50%;
-      }
-
-      .bb2a {
-        border-bottom: 5vh solid var(--building-color2);
-        border-left: 5vw solid transparent;
-        border-right: 5vw solid transparent;
-      }
-
-      .bb2b {
-        width: 100%;
-        height: 100%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 6%,
-            var(--window-color2) 6%,
-            var(--window-color2) 9%
-          );
-      }
-      
-      .bb3 {
-        width: 10%;
-        height: 55%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3),
-            var(--window-color3) 15%
-          );
-      }
-
-      .bb4 {
-        width: 11%;
-        height: 58%;
-      }
-
-      .bb4a {
-        width: 3%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4b {
-        width: 80%;
-        height: 5%;
-        background-color: var(--building-color4);
-      }
-  
-      .bb4c {
-        width: 100%;
-        height: 85%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4-window {
-        width: 18%;
-        height: 90%;
-        background-color: var(--window-color4);
-      }
-
-      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
-      .fb1 {
-        width: 10%;
-        height: 60%;
-      }
-
-      .fb1a {
-        border-bottom: 7vh solid var(--building-color4);
-        border-left: 2vw solid transparent;
-        border-right: 2vw solid transparent;
-      }
-
-      .fb1b {
-        width: 60%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-  
-      .fb1c {
-        width: 100%;
-        height: 80%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color4),
-            var(--building-color4) 10%,
-            transparent 10%,
-            transparent 15%
-          ),
-          repeating-linear-gradient(
-            var(--building-color4),
-            var(--building-color4) 10%,
-            var(--window-color4) 10%,
-            var(--window-color4) 90%
-          );
-      }
-
-      .fb2 {
-        width: 10%;
-        height: 40%;
-      }
-
-      .fb2a {
-        width: 100%;
-        border-bottom: 10vh solid var(--building-color3);
-        border-left: 1vw solid transparent;
-        border-right: 1vw solid transparent;
-      }
-
-      .fb2b {
-        width: 100%;
-        height: 75%;
-        background-color: var(--building-color3);
-      }
-
-      .fb2-window {
-        width: 22%;
-        height: 100%;
-        background-color: var(--window-color3);
-      }
-
-      .fb3 {
-        width: 10%;
-        height: 35%;
-      }
-  
-      .fb3a {
-        width: 80%;
-        height: 15%;
-        background-color: var(--building-color1);
-      }
-  
-      .fb3b {
-        width: 100%;
-        height: 35%;
-        background-color: var(--building-color1);
-      }
-
-      .fb3-window {
-        width: 25%;
-        height: 80%;
-        background-color: var(--window-color1);
-      }
-
-      .fb4 {
-        width: 8%;
-        height: 45%;
-        position: relative;
-        left: 10%;
-      }
-
-      .fb4a {
-        border-top: 5vh solid transparent;
-        border-left: 8vw solid var(--building-color1);
-      }
-
-      .fb4b {
-        width: 100%;
-        height: 89%;
-        background-color: var(--building-color1);
-        display: flex;
-        flex-wrap: wrap;
-      }
-      
-      .fb4-window {
-        width: 30%;
-        height: 10%;
-        border-radius: 50%;
-        background-color: var(--window-color1);
-        margin: 10%;
-      }
-
-      .fb5 {
-        width: 10%;
-        height: 33%;
-        position: relative;
-        right: 10%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 5%,
-            transparent 5%,
-            transparent 10%
-          ),
-          repeating-linear-gradient(
-            90deg,
-            var(--building-color2),
-            var(--building-color2) 12%,
-            var(--window-color2) 12%,
-            var(--window-color2) 44%
-          );
-      }
-
-      .fb6 {
-        width: 9%;
-        height: 38%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3) 10%,
-            transparent 10%,
-            transparent 30%
-          ),
-          repeating-linear-gradient(
-            var(--building-color3),
-            var(--building-color3) 10%,
-            var(--window-color3) 10%,
-            var(--window-color3) 30%
-          );
-      }
-
-      @media (max-width: 1000px) {
-        :root {
-          --building-color1: #000;
-          --building-color2: #000;
-          --building-color3: #000;
-          --building-color4: #000;
-        }
-
-        .sky {
-          background: radial-gradient(
-              closest-corner circle at 15% 15%,
-              #ccc,
-              #ccc 20%,
-              #445 21%,
-              #223 100%
-            );
-        }
-      }
-    </style>
-  </head>
-
-  <body>
-    <div class="background-buildings sky">
-      <div></div>
-      <div></div>
-      <div class="bb1 building-wrap">
-        <div class="bb1a bb1-window"></div>
-        <div class="bb1b bb1-window"></div>
-        <div class="bb1c bb1-window"></div>
-        <div class="bb1d"></div>
-      </div>
-      <div class="bb2">
-        <div class="bb2a"></div>
-        <div class="bb2b"></div>
-      </div>
-      <div class="bb3"></div>
-      <div></div>
-      <div class="bb4 building-wrap">
-        <div class="bb4a"></div>
-        <div class="bb4b"></div>
-        <div class="bb4c window-wrap">
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div></div>
-    </div>
-
-    <div class="foreground-buildings">
-      <div></div>
-      <div></div>
-      <div class="fb1 building-wrap">
-        <div class="fb1a"></div>
-        <div class="fb1b"></div>
-        <div class="fb1c"></div>
-      </div>
-      <div class="fb2">
-        <div class="fb2a"></div>
-        <div class="fb2b window-wrap">
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div class="fb3 building-wrap">
-        <div class="fb3a window-wrap">
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-        </div>
-        <div class="fb3b"></div>
-        <div class="fb3a"></div>
-        <div class="fb3b"></div>
-      </div>
-      <div class="fb4">
-        <div class="fb4a"></div>
-        <div class="fb4b">
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-        </div>
-      </div>
-      <div class="fb5"></div>
-      <div class="fb6"></div>
-      <div></div>
-      <div></div>
-    </div>
-  </body>
-</html>
-```
-
-</div>
-</section>
-
-
-## Solution
-<section id='solution'>
-
-```html
-<!DOCTYPE html>
-<html>    
-  <head>
-    <title>freeCodeCamp Skyline Project</title>
-    <style>
-      :root {
-        --building-color1: #aa80ff;
-        --building-color2: #66cc99;
-        --building-color3: #cc6699;
-        --building-color4: #538cc6;
-        --window-color1: #bb99ff;
-        --window-color2: #8cd9b3;
-        --window-color3: #d98cb3;
-        --window-color4: #8cb3d9;
-      }
-
-      * {
-        box-sizing: border-box;
-      }
-
-      body {
-        height: 100vh;
-        margin: 0;
-        overflow: hidden;
-      }
-
-      .background-buildings, .foreground-buildings {
-        width: 100%;
-        height: 100%;
-        display: flex;
-        align-items: flex-end;
-        justify-content: space-evenly;
-        position: absolute;
-        top: 0;
-      }
-      
-      .building-wrap {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-      }
-
-      .window-wrap {
-        display: flex;
-        align-items: center;
-        justify-content: space-evenly;
-      }
-
-      .sky {
-        background: radial-gradient(
-            closest-corner circle at 15% 15%,
-            #ffcf33,
-            #ffcf33 20%,
-            #ffff66 21%,
-            #bbeeff 100%
-          );
-      }
-
-      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
-      .bb1 {
-        width: 10%;
-        height: 70%;
-      }
-
-      .bb1a {
-        width: 70%;
-      }
-  
-      .bb1b {
-        width: 80%;
-      }
-  
-      .bb1c {
-        width: 90%;
-      }
-
-      .bb1d {
-        width: 100%;
-        height: 70%;
-        background: linear-gradient(
-            var(--building-color1) 50%,
-            var(--window-color1)
-          );
-      }
-
-      .bb1-window {
-        height: 10%;
-        background: linear-gradient(
-            var(--building-color1),
-            var(--window-color1)
-          );
-      }
-
-      .bb2 {
-        width: 10%;
-        height: 50%;
-      }
-
-      .bb2a {
-        border-bottom: 5vh solid var(--building-color2);
-        border-left: 5vw solid transparent;
-        border-right: 5vw solid transparent;
-      }
-
-      .bb2b {
-        width: 100%;
-        height: 100%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 6%,
-            var(--window-color2) 6%,
-            var(--window-color2) 9%
-          );
-      }
-      
-      .bb3 {
-        width: 10%;
-        height: 55%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3),
-            var(--window-color3) 15%
-          );
-      }
-
-      .bb4 {
-        width: 11%;
-        height: 58%;
-      }
-
-      .bb4a {
-        width: 3%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4b {
-        width: 80%;
-        height: 5%;
-        background-color: var(--building-color4);
-      }
-  
-      .bb4c {
-        width: 100%;
-        height: 85%;
-        background-color: var(--building-color4);
-      }
-
-      .bb4-window {
-        width: 18%;
-        height: 90%;
-        background-color: var(--window-color4);
-      }
-
-      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
-      .fb1 {
-        width: 10%;
-        height: 60%;
-      }
-
-      .fb1a {
-        border-bottom: 7vh solid var(--building-color4);
-        border-left: 2vw solid transparent;
-        border-right: 2vw solid transparent;
-      }
-
-      .fb1b {
-        width: 60%;
-        height: 10%;
-        background-color: var(--building-color4);
-      }
-  
-      .fb1c {
-        width: 100%;
-        height: 80%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color4),
-            var(--building-color4) 10%,
-            transparent 10%,
-            transparent 15%
-          ),
-          repeating-linear-gradient(
-            var(--building-color4),
-            var(--building-color4) 10%,
-            var(--window-color4) 10%,
-            var(--window-color4) 90%
-          );
-      }
-
-      .fb2 {
-        width: 10%;
-        height: 40%;
-      }
-
-      .fb2a {
-        width: 100%;
-        border-bottom: 10vh solid var(--building-color3);
-        border-left: 1vw solid transparent;
-        border-right: 1vw solid transparent;
-      }
-
-      .fb2b {
-        width: 100%;
-        height: 75%;
-        background-color: var(--building-color3);
-      }
-
-      .fb2-window {
-        width: 22%;
-        height: 100%;
-        background-color: var(--window-color3);
-      }
-
-      .fb3 {
-        width: 10%;
-        height: 35%;
-      }
-  
-      .fb3a {
-        width: 80%;
-        height: 15%;
-        background-color: var(--building-color1);
-      }
-  
-      .fb3b {
-        width: 100%;
-        height: 35%;
-        background-color: var(--building-color1);
-      }
-
-      .fb3-window {
-        width: 25%;
-        height: 80%;
-        background-color: var(--window-color1);
-      }
-
-      .fb4 {
-        width: 8%;
-        height: 45%;
-        position: relative;
-        left: 10%;
-      }
-
-      .fb4a {
-        border-top: 5vh solid transparent;
-        border-left: 8vw solid var(--building-color1);
-      }
-
-      .fb4b {
-        width: 100%;
-        height: 89%;
-        background-color: var(--building-color1);
-        display: flex;
-        flex-wrap: wrap;
-      }
-      
-      .fb4-window {
-        width: 30%;
-        height: 10%;
-        border-radius: 50%;
-        background-color: var(--window-color1);
-        margin: 10%;
-      }
-
-      .fb5 {
-        width: 10%;
-        height: 33%;
-        position: relative;
-        right: 10%;
-        background: repeating-linear-gradient(
-            var(--building-color2),
-            var(--building-color2) 5%,
-            transparent 5%,
-            transparent 10%
-          ),
-          repeating-linear-gradient(
-            90deg,
-            var(--building-color2),
-            var(--building-color2) 12%,
-            var(--window-color2) 12%,
-            var(--window-color2) 44%
-          );
-      }
-
-      .fb6 {
-        width: 9%;
-        height: 38%;
-        background: repeating-linear-gradient(
-            90deg,
-            var(--building-color3),
-            var(--building-color3) 10%,
-            transparent 10%,
-            transparent 30%
-          ),
-          repeating-linear-gradient(
-            var(--building-color3),
-            var(--building-color3) 10%,
-            var(--window-color3) 10%,
-            var(--window-color3) 30%
-          );
-      }
-
-      @media (max-width: 1000px) {
-        :root {
-          --building-color1: #000;
-          --building-color2: #000;
-          --building-color3: #000;
-          --building-color4: #000;
-          --window-color1: #777;
-          --window-color2: #777;
-          --window-color3: #777;
-          --window-color4: #777;
-        }
-
-        .sky {
-          background: radial-gradient(
-              closest-corner circle at 15% 15%,
-              #ccc,
-              #ccc 20%,
-              #445 21%,
-              #223 100%
-            );
-        }
-      }
-    </style>
-  </head>
-
-  <body>
-    <div class="background-buildings sky">
-      <div></div>
-      <div></div>
-      <div class="bb1 building-wrap">
-        <div class="bb1a bb1-window"></div>
-        <div class="bb1b bb1-window"></div>
-        <div class="bb1c bb1-window"></div>
-        <div class="bb1d"></div>
-      </div>
-      <div class="bb2">
-        <div class="bb2a"></div>
-        <div class="bb2b"></div>
-      </div>
-      <div class="bb3"></div>
-      <div></div>
-      <div class="bb4 building-wrap">
-        <div class="bb4a"></div>
-        <div class="bb4b"></div>
-        <div class="bb4c window-wrap">
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-          <div class="bb4-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div></div>
-    </div>
-
-    <div class="foreground-buildings">
-      <div></div>
-      <div></div>
-      <div class="fb1 building-wrap">
-        <div class="fb1a"></div>
-        <div class="fb1b"></div>
-        <div class="fb1c"></div>
-      </div>
-      <div class="fb2">
-        <div class="fb2a"></div>
-        <div class="fb2b window-wrap">
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-          <div class="fb2-window"></div>
-        </div>
-      </div>
-      <div></div>
-      <div class="fb3 building-wrap">
-        <div class="fb3a window-wrap">
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-          <div class="fb3-window"></div>
-        </div>
-        <div class="fb3b"></div>
-        <div class="fb3a"></div>
-        <div class="fb3b"></div>
-      </div>
-      <div class="fb4">
-        <div class="fb4a"></div>
-        <div class="fb4b">
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-          <div class="fb4-window"></div>
-        </div>
-      </div>
-      <div class="fb5"></div>
-      <div class="fb6"></div>
-      <div></div>
-      <div></div>
-    </div>
-  </body>
-</html>
-```
-
-</section>
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-01.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-001.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-01.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-001.md
index 4d5caa4178..6d3e830d1a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-01.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-001.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5a813321b9e3db6c106a46
-title: Part 01
+title: Part 1
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-02.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-002.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-02.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-002.md
index 4eacb0eeaa..085723f79b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-02.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-002.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5a8dd907f328a948d398ce
-title: Part 02
+title: Part 2
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-03.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-003.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-03.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-003.md
index 759f64f677..70c813c83b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-03.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-003.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5a8f1c07f328a948d398cf
-title: Part 03
+title: Part 3
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-04.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-004.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-04.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-004.md
index c7c951e6b1..392fe6976f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-04.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-004.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5a903507f328a948d398d0
-title: Part 04
+title: Part 4
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-05.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-005.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-05.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-005.md
index c0de28dbe8..6cfc2e5db8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-05.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-005.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5aaa5807f328a948d398d1
-title: Part 05
+title: Part 5
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-06.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-006.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-06.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-006.md
index cfb8e1a5d8..afe478f34b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-06.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-006.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5aab5d07f328a948d398d2
-title: Part 06
+title: Part 6
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-07.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-007.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-07.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-007.md
index b2fa30268d..af7eff2001 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-07.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-007.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5aac9c07f328a948d398d3
-title: Part 07
+title: Part 7
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-08.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-008.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-08.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-008.md
index aa2818c62e..db16443de8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-08.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-008.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5aad2307f328a948d398d4
-title: Part 08
+title: Part 8
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-09.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-009.md
similarity index 99%
rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-09.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-009.md
index bafd2648c6..8f721849f0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-09.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-009.md
@@ -1,6 +1,6 @@
 ---
 id: 5d5aae1207f328a948d398d5
-title: Part 09
+title: Part 9
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-10.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-010.md
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rename from curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-10.md
rename to curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-010.md
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-11.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-011.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-12.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-012.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-13.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-013.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-14.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-014.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-15.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-015.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-16.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-016.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-17.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-017.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-18.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-018.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-19.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-019.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-20.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-020.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-21.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-021.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-22.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-022.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-23.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-023.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-24.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-024.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-25.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-025.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-26.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-026.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-27.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-027.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-28.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-028.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-29.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-029.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-30.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-030.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-31.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-031.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-32.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-032.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-34.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-034.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-99.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript-rpg-game/part-099.md
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diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-001.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-001.md
index 9ae2ce132c..5c052f2faa 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-001.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-001.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253297c0ebb149ea9fed
-title: Part 001
+title: Part 1
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-002.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-002.md
index c45e87d8ae..57f650600a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-002.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-002.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925323be8848dbc58a07a
-title: Part 002
+title: Part 2
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-003.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-003.md
index bc5929ea71..7210cf4416 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-003.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-003.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792532f631702ae6d23e11
-title: Part 003
+title: Part 3
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-004.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-004.md
index d65f28860c..51b59b6f59 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-004.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-004.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925329445167ecc2ac9c9
-title: Part 004
+title: Part 4
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-005.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-005.md
index cf6d5db986..4f0053739d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-005.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-005.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792532b07918c3a5904913
-title: Part 005
+title: Part 5
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-006.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-006.md
index ce678d9ad2..a2d8e17cd0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-006.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-006.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533cc8b18b6c133edc7
-title: Part 006
+title: Part 6
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-007.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-007.md
index 80aeb69477..698a434e0e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-007.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-007.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925337954ed57a565a135
-title: Part 007
+title: Part 7
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-008.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-008.md
index c172ed6308..b4dc6bf928 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-008.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-008.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253352e33dd59ec2f6de
-title: Part 008
+title: Part 8
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-009.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-009.md
index 0749cc8eb6..0cc93e35de 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-009.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-009.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533d31e4f7fad33011d
-title: Part 009
+title: Part 9
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-010.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-010.md
index d17ae578cd..8a96326a96 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-010.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-010.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533e7707b9645d7b540
-title: Part 010
+title: Part 10
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-011.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-011.md
index 7365633ca2..7a01058e41 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-011.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-011.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253378595ec568f70ab6
-title: Part 011
+title: Part 11
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-012.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-012.md
index eda413abd0..c5d42e6095 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-012.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-012.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925330918ae4a2f282e7e
-title: Part 012
+title: Part 12
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-013.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-013.md
index 5b48c10b51..058cc6e230 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-013.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-013.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533ed00e75d129e1b18
-title: Part 013
+title: Part 13
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-014.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-014.md
index cdb50bf9ec..03dfbec401 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-014.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-014.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533a5c42fb4d1a4b70d
-title: Part 014
+title: Part 14
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-015.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-015.md
index bfb46d4df8..ba8f790240 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-015.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-015.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253358e8f646cbeb2bb0
-title: Part 015
+title: Part 15
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-016.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-016.md
index dba33142a8..f20c0289ec 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-016.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-016.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533bb38fab70b27f527
-title: Part 016
+title: Part 16
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-017.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-017.md
index c01c09beb0..2bfcd18928 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-017.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-017.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253386060ed9eb04a070
-title: Part 017
+title: Part 17
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-018.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-018.md
index d4ec221771..b935a9f9db 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-018.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-018.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533717672657b81aa69
-title: Part 018
+title: Part 18
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-019.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-019.md
index 5995cb0bf8..6bfdf304db 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-019.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-019.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925335ab63018dcec11fe
-title: Part 019
+title: Part 19
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-020.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-020.md
index b7c6b96b43..053062521b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-020.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-020.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925330f300c342315066d
-title: Part 020
+title: Part 20
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-021.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-021.md
index d0558f2ba4..ee4b8859ac 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-021.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-021.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792533aa6443215c9b16bf
-title: Part 021
+title: Part 21
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-022.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-022.md
index 8e33d917a0..187e22ce0c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-022.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-022.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925334c5e22586dd72962
-title: Part 022
+title: Part 22
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-023.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-023.md
index bcf348fc61..70cd29a7ae 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-023.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-023.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253307ecd49e030bdcd1
-title: Part 023
+title: Part 23
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-024.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-024.md
index 78c54e0c6d..6698387684 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-024.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-024.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534257122211d3043af
-title: Part 024
+title: Part 24
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-025.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-025.md
index 97986d0ab5..9d5654f8ea 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-025.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-025.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925346f4f2da6df4354a6
-title: Part 025
+title: Part 25
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-026.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-026.md
index 900eea5361..f0a0341a65 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-026.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-026.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534cac2dbe0a719ea7a
-title: Part 026
+title: Part 26
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-027.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-027.md
index 31b34f2ada..c1d29be1e2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-027.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-027.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534857332d07ccba3ad
-title: Part 027
+title: Part 27
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-028.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-028.md
index 746373571a..e0b51b2f53 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-028.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-028.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534d586ef495ea9df90
-title: Part 028
+title: Part 28
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-029.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-029.md
index 0c63ca458b..b63f718e70 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-029.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-029.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253410532e13d13fe574
-title: Part 029
+title: Part 29
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-030.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-030.md
index cbd5dff0b8..fd16734942 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-030.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-030.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925342415527083bd6667
-title: Part 030
+title: Part 30
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-031.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-031.md
index b924b5600b..413029badb 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-031.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-031.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534c3d26890ac1484d4
-title: Part 031
+title: Part 31
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-032.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-032.md
index eae8dc79d8..e569a55f9a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-032.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-032.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534b92f3d1cd4410ce3
-title: Part 032
+title: Part 32
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-033.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-033.md
index 6ef879b3ae..4994f809c5 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-033.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-033.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925341193948dfe6d76b4
-title: Part 033
+title: Part 33
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-034.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-034.md
index 9210d2ee82..8ac21354b8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-034.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-034.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534cf81365cfca58794
-title: Part 034
+title: Part 34
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-035.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-035.md
index ae9422a3ee..144ec7fb5c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-035.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-035.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925348ee084278ff15556
-title: Part 035
+title: Part 35
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-036.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-036.md
index 2ff4a44c23..d9c9d51436 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-036.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-036.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925348a6a41c32f7a4e3e
-title: Part 036
+title: Part 36
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-037.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-037.md
index 754eb05b23..3f6fc02d67 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-037.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-037.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534408c5be896b0a46e
-title: Part 037
+title: Part 37
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-038.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-038.md
index d8dd62a62f..f675558b7c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-038.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-038.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792534f0eda837510e9192
-title: Part 038
+title: Part 38
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-039.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-039.md
index 7c04e4abff..88255b33d3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-039.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-039.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925346b911fce161febaf
-title: Part 039
+title: Part 39
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-040.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-040.md
index a70353c8e5..b15d546c44 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-040.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-040.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253483eada4dd69258eb
-title: Part 040
+title: Part 40
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-041.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-041.md
index 28c9d6667b..2be8463961 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-041.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-041.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925342b2b993ef18cd45f
-title: Part 041
+title: Part 41
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-042.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-042.md
index 69a780f8b9..184a0f029e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-042.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-042.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925341747ad42b12f8e68
-title: Part 042
+title: Part 42
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-043.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-043.md
index 27c6780fab..abc77850ad 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-043.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-043.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535b0b3c198ee3ed6f9
-title: Part 043
+title: Part 43
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-044.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-044.md
index 3fd1f67a96..2549e4951e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-044.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-044.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925357a0533eb221b005d
-title: Part 044
+title: Part 44
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-045.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-045.md
index 94cf9fd0c8..0f0830f1d2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-045.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-045.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535591db67ee15b4106
-title: Part 045
+title: Part 45
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-046.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-046.md
index f5bc5b614d..bca8683780 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-046.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-046.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535f1f7adf77de5831d
-title: Part 046
+title: Part 46
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-047.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-047.md
index 9e883c7e2b..4f0d91a98c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-047.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-047.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925353d2c505eafd50cd9
-title: Part 047
+title: Part 47
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-048.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-048.md
index 9db23f2230..11e34a59d0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-048.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-048.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253539b5e944ba3e314c
-title: Part 048
+title: Part 48
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-049.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-049.md
index 34107d9907..a7c77b2638 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-049.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-049.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535a4f1cbff7a8b9a0b
-title: Part 049
+title: Part 49
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-050.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-050.md
index c8621d4d66..888fc7ccf2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-050.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-050.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535e3304f15a8890162
-title: Part 050
+title: Part 50
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-051.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-051.md
index e87eed74f2..ccfb9d16c8 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-051.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-051.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535a40ea5ac549d6804
-title: Part 051
+title: Part 51
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-052.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-052.md
index 83f7676240..0c94128506 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-052.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-052.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925358c220e5b2998909e
-title: Part 052
+title: Part 52
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-053.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-053.md
index d2a503d1e0..1b7668717d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-053.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-053.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925357729e183a49498aa
-title: Part 053
+title: Part 53
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-054.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-054.md
index ed79cf4053..fa28cae587 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-054.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-054.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253555aa652afbb68086
-title: Part 054
+title: Part 54
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-055.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-055.md
index 378a7bd903..0717db7312 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-055.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-055.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253582be306d339564f6
-title: Part 055
+title: Part 55
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-056.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-056.md
index 2e56aee963..7d96f306cc 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-056.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-056.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925352047e5c54882c436
-title: Part 056
+title: Part 56
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-057.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-057.md
index bb06bbd0dd..15bc905ed4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-057.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-057.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253568e441c0adf9db9f
-title: Part 057
+title: Part 57
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-058.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-058.md
index 4bf71716b2..99ce2e691c 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-058.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-058.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925356ab117923b80c9cd
-title: Part 058
+title: Part 58
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-059.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-059.md
index 96580005bf..0d9694f429 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-059.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-059.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792535e54a8cd729a0d708
-title: Part 059
+title: Part 59
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-060.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-060.md
index 569547c406..043e3cd7a0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-060.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-060.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925353b307724a462b06b
-title: Part 060
+title: Part 60
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-061.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-061.md
index 959eed3564..e3d3ad2d0f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-061.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-061.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536735f71d746ee5d99
-title: Part 061
+title: Part 61
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-062.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-062.md
index fcce7fe8a9..8fe8f43595 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-062.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-062.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536ad340d9dff2e4a96
-title: Part 062
+title: Part 62
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-063.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-063.md
index 1084cadcdc..25b03c8023 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-063.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-063.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925369614afd92d01fed5
-title: Part 063
+title: Part 63
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-064.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-064.md
index 64f6b3c0f9..d6e1c9bef4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-064.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-064.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536504e68254fe02236
-title: Part 064
+title: Part 64
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-065.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-065.md
index 57e59b46dd..44eb6f9937 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-065.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-065.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536c8d2f0fdfad768fe
-title: Part 065
+title: Part 65
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-066.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-066.md
index b91dcb9be9..1a73fcff30 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-066.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-066.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253639028b8ec56afcda
-title: Part 066
+title: Part 66
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-067.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-067.md
index 6d98de26ca..75027c7e2e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-067.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-067.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536834f2fd93e84944f
-title: Part 067
+title: Part 67
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-068.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-068.md
index f6d0d4fb1f..d29c5c6769 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-068.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-068.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536ddff9ea73c90a994
-title: Part 068
+title: Part 68
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-069.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-069.md
index 786fbde6fc..ef014aa196 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-069.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-069.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925361596f84067904f7f
-title: Part 069
+title: Part 69
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-070.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-070.md
index 1fd5d51344..217a576305 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-070.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-070.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536dd8a4daf255488ac
-title: Part 070
+title: Part 70
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-071.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-071.md
index 8fed09b6ad..b5d946bf7a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-071.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-071.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536449c73004f265fb1
-title: Part 071
+title: Part 71
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-072.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-072.md
index 502e36f1d2..1819ca42e7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-072.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-072.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253685fc69b8fe60a0d2
-title: Part 072
+title: Part 72
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-073.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-073.md
index c042c97bc9..fd40258842 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-073.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-073.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536dc6e3ab29525de9e
-title: Part 073
+title: Part 73
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-074.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-074.md
index eabe9d5a2b..6d23df9501 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-074.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-074.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536cfd0fd893c630abb
-title: Part 074
+title: Part 74
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-075.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-075.md
index 62a4731c57..f40c36a10e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-075.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-075.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925366a5ff428fb483b40
-title: Part 075
+title: Part 75
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-076.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-076.md
index b669cfecf5..a1714ca295 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-076.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-076.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925365d4035eeb2e395fd
-title: Part 076
+title: Part 76
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-077.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-077.md
index 113413a1ed..a8986d2ccc 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-077.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-077.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925364c106e9aaf05a16f
-title: Part 077
+title: Part 77
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-078.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-078.md
index 9377841679..5e18835201 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-078.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-078.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536970cd8e819cc8a96
-title: Part 078
+title: Part 78
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-079.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-079.md
index 75508402c3..193442d45a 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-079.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-079.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792536e33baeaa60129e0a
-title: Part 079
+title: Part 79
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-080.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-080.md
index a99234f9ad..45f60c5014 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-080.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-080.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925379e2a488f333e2d43
-title: Part 080
+title: Part 80
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-081.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-081.md
index c39ed6de69..f77917100e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-081.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-081.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925379000785f6d8d9af3
-title: Part 081
+title: Part 81
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-082.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-082.md
index e0f98c012a..9a140c09e0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-082.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-082.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253791391b0acddd0ac5
-title: Part 082
+title: Part 82
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-083.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-083.md
index 643e8fcba6..0f7caf9d18 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-083.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-083.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925373104ae5ae83f20a5
-title: Part 083
+title: Part 83
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-084.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-084.md
index 4ef2d62018..26e57618c4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-084.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-084.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925373b7127cfaeb50c26
-title: Part 084
+title: Part 84
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-085.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-085.md
index 4d34006e1b..58decedc50 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-085.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-085.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537cb3a5cd6baca5e1a
-title: Part 085
+title: Part 85
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-086.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-086.md
index a9e60ffb8d..ef8a541eff 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-086.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-086.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253742f3313d55db981f
-title: Part 086
+title: Part 86
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-087.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-087.md
index 299a38a675..198f2b815e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-087.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-087.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925379e0180a438ce7f95
-title: Part 087
+title: Part 87
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-088.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-088.md
index 77d20183ac..dadec6e41b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-088.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-088.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537c80984dfa5501b96
-title: Part 088
+title: Part 88
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-089.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-089.md
index d8ba1c0e73..e7bb48e72f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-089.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-089.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925377b54d8a76efb5657
-title: Part 089
+title: Part 89
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-090.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-090.md
index d8da9e1a65..b3bccabcba 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-090.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-090.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925371398513549bb6395
-title: Part 090
+title: Part 90
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-091.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-091.md
index 5ec64310d5..d1b754a17e 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-091.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-091.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537ea3eaf302bf2d359
-title: Part 091
+title: Part 91
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-092.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-092.md
index a68e9067c4..1de0f9afe9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-092.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-092.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537533b1c7843bfd029
-title: Part 092
+title: Part 92
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-093.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-093.md
index 794743b956..4b7b7be5c3 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-093.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-093.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537dc0fe84345d4f19e
-title: Part 093
+title: Part 93
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-094.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-094.md
index a20ea76142..31f435ed60 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-094.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-094.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537b6cadae0f4b0cda1
-title: Part 094
+title: Part 94
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-095.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-095.md
index 285bac8aa5..466cc8e64b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-095.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-095.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253770083fb730c93a93
-title: Part 095
+title: Part 95
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-096.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-096.md
index b1937473ea..1f422f41cd 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-096.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-096.md
@@ -1,6 +1,6 @@
 ---
 id: 5d792537fef76b226b63b93b
-title: Part 096
+title: Part 96
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-097.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-097.md
index f95dbafcd2..5d86d80e5f 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-097.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-097.md
@@ -1,6 +1,6 @@
 ---
 id: 5d79253760fca25ccbbd8990
-title: Part 097
+title: Part 97
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-098.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-098.md
index 8f0c3c01f1..8adac0c682 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-098.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-098.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925374321824cba309875
-title: Part 098
+title: Part 98
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-099.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-099.md
index 5903cf95cc..d988782dc1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-099.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming-spreadsheet/part-099.md
@@ -1,6 +1,6 @@
 ---
 id: 5d7925381e8565a5c50ba7f1
-title: Part 099
+title: Part 99
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-01.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-001.md
similarity index 99%
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index 3836d448bc..8b43d877b7 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-01.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-001.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9a
-title: Part 01
+title: Part 1
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-02.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-002.md
similarity index 99%
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index e9735a61e8..4497887fa2 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-02.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-002.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9b
-title: Part 02
+title: Part 2
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-03.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-003.md
similarity index 99%
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index a9eaa3ed62..203cb367f1 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-03.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-003.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9c
-title: Part 03
+title: Part 3
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-04.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-004.md
similarity index 99%
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index 7b7d85eccc..90571d3440 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-04.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-004.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9d
-title: Part 04
+title: Part 4
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-05.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-005.md
similarity index 99%
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index a549c248fb..d7d5670c31 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-05.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-005.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9e
-title: Part 05
+title: Part 5
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-06.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-006.md
similarity index 99%
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index ecfe041d2b..178609e051 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-06.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-006.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44d9f
-title: Part 06
+title: Part 6
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-07.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-007.md
similarity index 99%
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index 8ec23cb567..293dc93499 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-07.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-007.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44da0
-title: Part 07
+title: Part 7
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-08.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-008.md
similarity index 99%
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index 694eb386ff..5c11a26f86 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-08.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-008.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44da1
-title: Part 08
+title: Part 8
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-09.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-009.md
similarity index 99%
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index cbc6befdc1..1f969a6338 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-09.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-009.md
@@ -1,6 +1,6 @@
 ---
 id: 5ddb965c65d27e1512d44da2
-title: Part 09
+title: Part 9
 challengeType: 0
 isHidden: true
 ---
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-10.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-javascript-calorie-counter/part-010.md
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