79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
60 lines
1.1 KiB
Markdown
60 lines
1.1 KiB
Markdown
---
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id: 5900f4461000cf542c50ff58
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challengeType: 5
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title: 'Problem 217: Balanced Numbers'
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---
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## Description
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<section id='description'>
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A positive integer with k (decimal) digits is called balanced if its first ⌈k/2⌉ digits sum to the same value as its last ⌈k/2⌉ digits, where ⌈x⌉, pronounced ceiling of x, is the smallest integer ≥ x, thus ⌈π⌉ = 4 and ⌈5⌉ = 5.
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So, for example, all palindromes are balanced, as is 13722.
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Let T(n) be the sum of all balanced numbers less than 10n.
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Thus: T(1) = 45, T(2) = 540 and T(5) = 334795890.
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Find T(47) mod 315
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler217()</code> should return 6273134.
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testString: assert.strictEqual(euler217(), 6273134, '<code>euler217()</code> should return 6273134.');
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler217() {
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// Good luck!
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return true;
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}
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euler217();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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