Question

numbers divisible by 9​

Answer 1

Answer:

Consider the following numbers which are divisible by 9, using the test of divisibility by 9: 99, 198, 171, 9990, 3411. Sum of the digits of 99 = 9 + 9 = 18, which is divisible by 9. Hence, 99 is divisible by 9.

Answer 2

all multiples of nine are divisible