Question

In the number 163__ fill in the blank in such a way so that the new number obtained is exactly divisible by 3.

• A. zero
• B. 2
• C. 1
• D. 3

Answer 1

The correct option is B

2

A number is divisible by 3 if sum of its digits is divisible by 3.
1 + 6 + 3 = 10.
Out of the above numbers, the number that can be added to 10 to make the sum of all the digits exactly divisible by 3 is 2, as 10 + 2 = 12 which is exactly divisible by 3.