Question

IV Solve the following
25.1f 21y is a multiple of 9, where 'y' is a digit. What is the value of y?
Y​

Answer 1

Answer:

3z, where z = any number

Step-by-step explanation:

Let the number be x that is multiplied by 9 to get 21y.

A/Q,       21y = 9x

      =>     x/y = 21/9

              x:y = 7:3

Let there is z in the ratio.

Now,      x = 7z & y = 3z, where z is any number.

Therefore, y = 3z,  where z = any number. ANS.