---
id: 5900f3a41000cf542c50feb7
challengeType: 5
title: 'Problem 56: Powerful digit sum'
---

## Description
<section id='description'>
A googol (10100) is a massive number: one followed by one-hundred zeros; 100100 is almost unimaginably large: one followed by two-hundred zeros. Despite their size, the sum of the digits in each number is only 1.
Considering natural numbers of the form, ab, where a, b < 100, what is the maximum digital sum?
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler56()</code> should return 972.
    testString: assert.strictEqual(euler56(), 972, '<code>euler56()</code> should return 972.');

```

</section>

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

<div id='js-seed'>

```js
function euler56() {
  // Good luck!
  return true;
}

euler56();
```

</div>



</section>

## Solution
<section id='solution'>

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