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Quantitative Aptitude

Divisibility Rule for 3 & 9

Find the sum ...

Question

Find the sum of the sum of the sum of digits (i.e. digit sum) of 25! (e.g.,) digit sum of 378 = 3+7+8 = 18 : 1+8 = 9

A

9

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B

3

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C

6

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D

7

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E

5

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Solution

The correct option is A 9
Option a

$D i g i t S u m = R e m e m b e r w h e n a n u m b e r i s d i v i d e d b y 9.$

$\frac{25!}{9} R e m = 0 \Rightarrow D i g i t S u m = 9$

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