Question

if 21y5 is am multiple of 9, where is a digit,what is the value​

Answer 1

Answer:

1

Step-by-step explanation:

answer is 1

2115 is divisible by 9

so y=1

Answer 2

Answer:

y=1

Step-by-step explanation:

The given number is:

N=21y5

If n is a multiple of 9 then

as per rule the sum of digits are multiple of 9

sum of digits=2+1+y+5

=y+8

Y can be from 0 to 9

If y=1 then

y+8=1+8=9 is divisible by 9\

so y=1