---
id: 5900f3a31000cf542c50feb6
challengeType: 5
title: 'Problem 55: Lychrel numbers'
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert.strictEqual(countLychrelNumbers(1000), 13, "<code>countLychrelNumbers(1000)</code> should return 13.");'
  - text: ''
    testString: 'assert.strictEqual(countLychrelNumbers(5000), 76, "<code>countLychrelNumbers(5000)</code> should return 76.");'
  - text: ''
    testString: 'assert.strictEqual(countLychrelNumbers(10000), 249, "<code>countLychrelNumbers(10000)</code> should return 249.");'
  - text: ''
    testString: 'assert.strictEqual(countLychrelNumbers(3243), 39, "Your function should count all Lychrel numbers.");'
  - text: ''
    testString: 'assert.strictEqual(countLychrelNumbers(7654), 140, "Your function should pass all test cases.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function countLychrelNumbers(num) {
  // Good luck!
  return true;
}

countLychrelNumbers(10000);

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>