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---
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id: 5900f4181000cf542c50ff2b
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challengeType: 5
title: 'Problem 172: Investigating numbers with few repeated digits'
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videoUrl: ''
localeTitle: 'Problema 172: Investigando números con pocos dígitos repetidos'
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---
## Description
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< section id = "description" > ¿Cuántos números de 18 dígitos n (sin ceros a la izquierda) hay de tal manera que no aparezca un dígito más de tres veces en n? < / section >
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## Instructions
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< section id = "instructions" >
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< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: < code > euler172()</ code > debe devolver 227485267000992000.
testString: 'assert.strictEqual(euler172(), 227485267000992000, "< code > euler172()< / code > should return 227485267000992000.");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
function euler172() {
// Good luck!
return true;
}
euler172();
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```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
// solution required
```
< / section >