Question

If "3531x5" is a multiple of 3, where z is a digit then find all the possible values of x.​

Answer 1

Answer:

4

Step-by-step explanation:

a number is divisible by 3 if the sum of its digits is a multiple of 3.

3+5+3+1+x+5= 17+x

if 4 replace x then, 3+5+3+1+4+5= 21, 21 is multiple of 3

353145 / 3 = 117715

therefore 3 x 117715 = 353145