64 lines
1.0 KiB
Markdown
64 lines
1.0 KiB
Markdown
---
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id: 5900f3ab1000cf542c50febe
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challengeType: 5
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title: 'Problem 63: Powerful digit counts'
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forumTopicId: 302175
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---
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## Description
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<section id='description'>
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The 5-digit number, 16807 = 7<sup>5</sup>, is also a fifth power. Similarly, the 9-digit number, 134217728 = 8<sup>9</sup>, is a ninth power.
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How many <var>n</var>-digit positive integers exist which are also an <var>n</var>th power?
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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>powerfulDigitCounts()</code> should return a number.
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testString: assert(typeof powerfulDigitCounts() === 'number');
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- text: <code>powerfulDigitCounts()</code> should return 49.
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testString: assert.strictEqual(powerfulDigitCounts(), 49);
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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 powerfulDigitCounts() {
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return true;
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}
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powerfulDigitCounts();
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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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