Question

.If 31x4 is a multiple of 3 where x is digit, what might be the value of x?​

Answer 1

Answer:

x = 1

Step-by-step explanation:

Given, 31x4 is a multiple of 3

by the test of divisibility of 3, sum of all digits should be a multiple of 3

so, here, 3+1+x+4 = 3multiple

                     x+8 = 3multiple

8 is the next 3 multiple after 8

=> x+8 = 9

=> x = 1

ie., the least number for x is 1 , so that the sum x+8 is a multiple of 3.