Sum Of Digits Rule

Number Theory Level 2

An integer is said to be divisible by n n if the sum of digits of the same integer is divisible by n n as well. Which of the following are possible values of n n ?

(A) : 3
(B) : 6
(C) : 9

(A) and (B) only (A), (B) and (C) (A) and (C) only (B) and (C) only

Pi Han Goh by Pi Han Goh , 30, Malaysia

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1 solution

Sonia Gupta
Jun 7, 2016

In this 3 & 9 will be the answer because any integer number will be divisible by 3 & 9 when the sum of the digits of that integer will be divisible by 3 & 9.

1 + 8 = 9

It means it is divisible by both 3 & 9

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