Question

Question 200

Using divisibility test, determine which of the following numbers are divisible by 9?

(a) 672

(b) 5652

Answer 1

We know that, a number is divisible by 9, if the sum of its digits is divisible by 9.
(a) We have, 672
The sum digits = 6 + 7 + 2 = 15, which is not divisible by 9.
Hence, 672 is not divisible by 9.
(b) We have, 5652
The sum digits = 5 + 6 + 5 + 2 = 18, which is divisible by 9.
Hence, 5652 is divisible by 9.