Question

If 31x5 is a multiple of 3 where x is a digit, what might be the value of x.​

Answer 1

Answer:

x = 0, 3,6, 9

Step-by-step explanation:

According to the question,

31x5 is a multiple of 3,

Then the sum of its digits will be a multiple of 3

3 + 1 + x + 5 =3 + x

therefore, 3 + x is a multiple of 3

Then possible values of x will be,

0, 3, 6 and 9