If is a 3-digit number, then

is always divisible by

A. 12

B. 15

C. 18

D. 21

Q.

If is a 3-digit number, then the number

is always divisible by

A. 8

B. 7

C. 6

D. 5

Q. When a 3-digit number 'abc' is added as abc + bca + cab, their sum is always divisible by .

Q. Take a 3 digit number 'abc'. If we add abc, cab and bca together then the resulting sum is divisible by_____.

Q.

Suppose a 3-digit number is divisible by 3. Prove that is divisible by 9.

Q. Take a three-digit number abc. Form bca and cab from this. The sum of all 3 numbers is divisible by 111.