Question

Find all possible values of X from which the number 7 x 3 is divisible by 3. Also , find each such number.

Answer 1

By the divisibility test , if the sum of digits of a number is divisible by 3 then the number is divisible by 3.

According to this test , the value of X
may be 3 or 6 or 9 so that the
Sum of digits divisible by 3.

The required numbers are
733
763
793