Question

A thee digit number 24 y is a multiple of 3,what should be the value of y?​

Answer 1

Any 3 digit number can be divisible by 3, only if the sum of all the 3 digits is divisible by 3.

In the present sum, the initial 2 digits given is 2 & 4 and it's sum is already divisible by 3.

So the 3rd digit y may be anything between 0 to 9.

Case - 1 : It may be 24 0 => It's divisible by 3

So the other possible last digit may be either 3, 6 or 9

Answer : Third digit may be either 0, 3, 6 or 9