Question

If 3x12 is a multiple of 3 And x is digit, them find the valve of x​

Answer 1

Answer:

3×12

3andx=12 12 is the valve of x

Answer 2

Answer:

A number is a multiple of 3, if sum of it's digits are multiple of 3. i.e., 3+x+1+2 = 6 + x should be multiple of 3.

Hope it helps..