Digital Roots?

Number Theory Level 1

What is the digital root of 35 added to the digital root of 62, then the entire quantity multiplied by 4?


The answer is 64.

Tor Park by Tor Park , 14, USA

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2 solutions

Tor Park
Dec 14, 2018

To take a digital root of a number means to add up all the digits in the number, so to solve this problem, the digital root of 35 = 3 + 5 = 8 3 + 5 = 8 , and the digital root of 62 = 6 + 2 = 8 6 + 2 = 8 , added together ( 8 + 8 8 + 8 ) it comes to 16, which, when multiplied by 4, comes out to 64. For more information on digital roots: https://en.wikipedia.org/wiki/Digital_root

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Can you add the website of digital roots from Wikipedia or add additional information regarding digital number so that people will not find difficulty in solving this.

Ram Mohith - 2 years, 3 months ago

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The point of the problem is to test whether you know what a digital root is, not the simple arithmetic that goes along with it, but giving a link in the solution is a good idea.

Tor Park - 2 years, 3 months ago
Kyle T
Feb 27, 2019

35 => 3+5 = 8
62 => 6+2 = 8
4*(8+8) = 64

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