Question

If 21 by 5 is a multiplier of 9 why is a digit what is the value of y

Answer 1

Answer:

The divisibility test for 9 states that, “A number is divisible by 9 if and only if the sum of its digits is a multiple of 9 "

That is, if the sum of the digits of a number is 9,18,27 etc., then only the number is divisible by 9

The number given is 21y5

So, first we will check whether the sum can be 9

2+1+y+5=9

8+y=9

y=1

So we got a non-negative number in the range [0,9)

Thus y=1 will make the number divisible by 9

Infact,

21159=235

Step-by-step explanation:

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