Answer :

Given, 2791A a number divisible by 9

Need to find out A

⇒ Sum of the digits of a number 2791A must be divisible by 9

⇒ 2 + 7 + 9 + 1 + A = 19 + A must be divisible by 9

Substitute A value from 0 to 9 by trial error method

We get

A = 8 as 27918 is divisible by 9.

19 + 8 = 27 is divisible by 9.

Hence, A is 8.

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