Question

If 21y 5 is a multiple of a where y is a digit what is the value of y?​

Answer 1

Step-by-step explanation:

Hello friend,

Heres your answer:

Property:

If a number should be divisible by nine, then the sum of the digits must be divisible by nine.

According to the property:

2 + 1 + y + 5 = Multiples of nine

=> 8 + y = 9 (suppose, because y must be 1 digit)

therefore y= 1 only.

Hope my answer helps you.

Please follow me plz