Question

A number is divisible by 3 if the sum of its digits is divisible by …….. .
A. 1
B. 2
C. 3
D. 5

Answer 1

A number is divisible by 3 if the sum of its digits is divisible by 3.

Answer 2

Answer:Option C (3)

Solution:

Divisibility test by 3:A number is said to be divisible by 3, if sum of its digits are divisible by 3.

For eg: 56745831

Let us check the divisibility by 3 of number written above

5+6+7+4+5+8+3+1=39

Now we know that 39 is divisible by 3, So the number 56745831 is divisible by 3.

Now let us take another number;

87654321,it is not divisible by 3, because

8+7+6+5+4+3+2+1=35

and 35 is not divisible by 3.

Hope it helps you.