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freeCodeCamp/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-85-counting-rectangles.english.md
Kristofer Koishigawa 6cfd0fc503 fix: improve Project Euler descriptions, challenge seeds, and test cases (#38016)
* fix: improve Project Euler descriptions and test case

Improve formatting of Project Euler test descriptions. Also add poker hands array and new test case for problem 54

* feat: add typeof tests and gave functions proper names for first 100 challenges

* fix: continue fixing test descriptions and adding "before test" sections

* fix: address review comments

* fix: adjust grids in 18 and 67 and fix some text that reference files rather than the given arrays

* fix: implement bug fixes and improvements from review

* fix: remove console.log statements from seed and solution
2020-02-28 06:39:47 -06:00

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1.3 KiB
Markdown

---
id: 5900f3c11000cf542c50fed4
challengeType: 5
title: 'Problem 85: Counting rectangles'
forumTopicId: 302199
---
## Description
<section id='description'>
By counting carefully it can be seen that a rectangular grid measuring 3 by 2 contains eighteen rectangles:
<img class="img-responsive center-block" alt="a diagram of the different rectangles found within a 3 by 2 rectangular grid" src="https://cdn-media-1.freecodecamp.org/project-euler/counting-rectangles.png" style="background-color: white; padding: 10px;">
Although there exists no rectangular grid that contains exactly two million rectangles, find the area of the grid with the nearest solution.
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>countingRectangles()</code> should return a number.
testString: assert(typeof countingRectangles() === 'number');
- text: <code>countingRectangles()</code> should return 2772.
testString: assert.strictEqual(countingRectangles(), 2772);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function countingRectangles() {
// Good luck!
return true;
}
countingRectangles();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>