freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-172-investigating-numbers-with-few-repeated-digits.md

---
id: 5900f4181000cf542c50ff2b
title: 'Problem 172: Investigating numbers with few repeated digits'
challengeType: 5
forumTopicId: 301807
dashedName: problem-172-investigating-numbers-with-few-repeated-digits
---

# --description--

How many 18-digit numbers $n$ (without leading zeros) are there such that no digit occurs more than three times in $n$?

# --hints--

`numbersWithRepeatedDigits()` should return `227485267000992000`.

```js
assert.strictEqual(numbersWithRepeatedDigits(), 227485267000992000);
```

# --seed--

## --seed-contents--

```js
function numbersWithRepeatedDigits() {

  return true;
}

numbersWithRepeatedDigits();
```

# --solutions--

```js
// solution required
```