22afc2a0ca
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Kristofer Koishigawa <scissorsneedfoodtoo@gmail.com> Co-authored-by: Beau Carnes <beaucarnes@gmail.com>
73 lines
1.6 KiB
Markdown
73 lines
1.6 KiB
Markdown
---
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id: 5900f3901000cf542c50fea3
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challengeType: 5
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isHidden: false
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title: 'Problem 36: Double-base palindromes'
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forumTopicId: 302020
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---
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## Description
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<section id='description'>
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The decimal number, 585 = 1001001001<sub>2</sub> (binary), is palindromic in both bases.
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Find the sum of all numbers, less than `n`, whereas 1000 ≤ `n` ≤ 1000000, which are palindromic in base 10 and base 2.
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(Please note that the palindromic number, in either base, may not include leading zeros.)
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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>doubleBasePalindromes(1000)</code> should return a number.
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testString: assert(typeof doubleBasePalindromes(1000) === 'number');
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- text: <code>doubleBasePalindromes(1000)</code> should return 1772.
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testString: assert(doubleBasePalindromes(1000) == 1772);
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- text: <code>doubleBasePalindromes(50000)</code> should return 105795.
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testString: assert(doubleBasePalindromes(50000) == 105795);
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- text: <code>doubleBasePalindromes(500000)</code> should return 286602.
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testString: assert(doubleBasePalindromes(500000) == 286602);
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- text: <code>doubleBasePalindromes(1000000)</code> should return 872187.
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testString: assert(doubleBasePalindromes(1000000) == 872187);
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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 doubleBasePalindromes(n) {
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// Good luck!
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return n;
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}
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doubleBasePalindromes(1000000);
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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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