Question

1. If21y5 is a multiple of 9, where y is a digit, what is the value of y? T1​

Answer 1

Answer:

If a number should be divisible by nine, then the sum of the digits must be divisible by nine. therefore y= 1 only. Hope my answer helps you.

Answer 2

Value of y is nine as 5 in nine table in ones digit will come on 45