Question

If 21y5 is a multiple of 9, where y is a digit, what is the value of y?​

Answer 1

Answer:

For any number to be divisible by 9, the sum of the digits must be 9. So the number is 2115 and y = 1.

Hope it helps you

Answer 2

Answer:

1

Step-by-step explanation:

For any number to be divisible by 9 sum of digits should be 9 ( divisibility rule)