Question

Test the divisibility of following numbers by 3 and 9
(i) 1839 (ii) 236637

Answer 1

Explanation:

Check divisible by 3.

1839=1+8+3+9=21

Yes 21 is divisible by 3

So 1839 is also divisible by 3

But 21 is not divisible by 9 so 1839 is not divisible by 9

Part 2. 236637 = 2+3+6+6+3+7 =27

27 is divisible by 3 and 9 also so 236637 is divisible by both 3 and 9