Question

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

​

Answer 1

Step-by-step explanation:

as per divisibility test of 9,

a no. is divisible by 9 if the sum of the digits is multiple of 9

so,

in 21y5,

2+1+y+5 = y+8

so y can be 1

as the sum will become 9

HOPE IT HELPS YOU

PLEASE MARK AS BRAINLIEST ✨