Question

If a number is divisible by 3, it must be divisible by 9​

Answer 1

Ans : No. is divisible by 3 & 9 when sum of digits of number is divisible by them.

For ex : 366 is divisible by 3 when 3+6+6=15 is divisible by 3.

Similarly, 918 is divisible by 9 when 9+1+8=18 is divisible by 9.