Question

if 21 y5 is multiple of 9 where y is digit what is the value of y​

Answer 1

Answer:

1

Step-by-step explanation:

for any no divisble by 9 sum of digit is divisble by 9

Answer 2

Answer:

The given number is 21y5

Sum of its digits =(2+1+y+5)=(8+y),which must be divisible by 9.

This happens when y= 1

Therefore, the required number is 2115

Step-by-step explanation:

Hope it helps...

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