Question

A579B is divisible by 72.find the value of A-B?​

Answer 1

Given: A579B is divisible by 72

To find: Find the value of A-B?​

Solution:

• Now we have given that the number is divisible by 72, that means it is divisible by 8.

• So last three digits should be divisible by 8.

              79B  /  8

• So here B is equal to 2

• A5792
• Now, the number is also divisible by 9, so to check this sum of digits should be the multiple of 9

               A + 6 + 7 + 9 + B

              A + 22 + 2

              A+24

• Since this should be multiple of 9, so A = 3

Answer:

                 Hence value of A - B = 3 - 2 = 1