Question

Match the following numbers with the numbers that they are divisible by.

• A. 9
• B. 4
• C. 10

Answer 1

• If a number is divisible by 9, then the sum of all its digits must be divisible by 9.

So, sum of digits in 198 i.e.,
1 + 9 + 8 = 18 is divisible by 9.
Hence, 198 is divisible by 9

• If a number is divisible by 4, then its last two digits divisible by 4.

So, in 112 last two digits are 12 is divisible by 4.
Hence, 112 is divisible by 4.

• If a number is divisible by 10, then the number must end with 0.

So, 130 ends with 0.
Hence, 130 is divisible by 10.