9. Which of the following numbers are divisible by 9?
(i) 666657
A number is divisible by 9 only when the sum of its digits is divisible by 9.
666657=6+6+6+6+5+7=36
As we know that 36 is divisible by 9 so the given number is divisible by 9
Find which of the following numbers are divisible by 9:
(i)1332