Question

if 72 X is a multiple of 3 where X is a digit than what is the value of x

Answer 1

X can have values= 0, 3,6,9

Answer 2

Here the value of x should be the multiple of 3. Or we can say that the value should be like that which when added with the 7 and 2 gives the multiple of 3.
Eg: when we put value of x 3 such that the value becomes 723. When we add all these digits together according to the divisibility rule of 3.

Hope it helps.....