Question

Find the value of x. If 7x8 is exactly divisible by 9

Answer 1

Given: The number 7x8

To find: The value of x if the given number is divisible by 9.

Solution:

• Now we have given the number: 7x8

• Divisibility test of 9 is if the sum of the digits of a number is divisible by 9, then the number is divisible by 9.

                7 + x + 8 = multiple of 9

                15 + x = 0, 9, 18, …

                15 + x = 18

                x = 3

Answer:

            So  the least value of y is 3.