Question

If 21y5 is e multiply of 9 , where y is a digit ,what is the value of y

Answer 1

Explanation:

For a number to be a multiple of 9 , the sum of digits should be divisible by 9 .

So,

2+1+y+5 = Multiple of 9

= 8+y

y = 1

Answer 2

Answer:

1

Explanation:

2+1+5+y=a multiple of 9

8+y=a multiple of 9

8+y=9( multiple of 9)

9-8=y

1=y