freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-166-criss-cross.md

---
id: 5900f4131000cf542c50ff25
challengeType: 5
title: 'Problem 166: Criss Cross'
forumTopicId: 301800
---

## Description
<section id='description'>
A 4x4 grid is filled with digits d, 0 ≤ d ≤ 9.

It can be seen that in the grid


6 3 3 0
5 0 4 3
0 7 1 4
1 2 4 5

the sum of each row and each column has the value 12. Moreover the sum of each diagonal is also 12.

In how many ways can you fill a 4x4 grid with the digits d, 0 ≤ d ≤ 9 so that each row, each column, and both diagonals have the same sum?
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler166()</code> should return 7130034.
    testString: assert.strictEqual(euler166(), 7130034);

```

</section>

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

<div id='js-seed'>

```js
function euler166() {

  return true;
}

euler166();
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

</section>