47 lines
896 B
Markdown
47 lines
896 B
Markdown
---
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id: 5900f3a41000cf542c50feb7
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title: 'Problem 56: Powerful digit sum'
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challengeType: 5
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forumTopicId: 302167
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dashedName: problem-56-powerful-digit-sum
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---
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# --description--
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A googol (10<sup>100</sup>) is a massive number: one followed by one-hundred zeros; 100<sup>100</sup> is almost unimaginably large: one followed by two-hundred zeros. Despite their size, the sum of the digits in each number is only 1.
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Considering natural numbers of the form, `ab`, where `a`, `b` < 100, what is the maximum digital sum?
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# --hints--
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`powerfulDigitSum()` should return a number.
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```js
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assert(typeof powerfulDigitSum() === 'number');
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```
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`powerfulDigitSum()` should return 972.
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```js
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assert.strictEqual(powerfulDigitSum(), 972);
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```
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# --seed--
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## --seed-contents--
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```js
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function powerfulDigitSum() {
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return true;
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}
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powerfulDigitSum();
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```
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# --solutions--
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```js
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// solution required
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```
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