Reversing the 3 digit numbers and Subtracting them

Q.

If the difference between a 3-digit number abc and the number obtained by reversing its digits is divided by 11, the quotient obtained is always a multiple of ___.

1. 9
2. a + b
3. 11
4. a + c

Q.

Find the possible factors of $45$?

Q.

When all the prime numbers less than $100$ are multiplied, the digit at ones place is

1. $3$

2. $2$

3. $1$

4. $0$

Q. $abc$ is a three-digit number. This three-digit number is reversed and subtracted from the original number. By which number will the difference obtained be always divisible?

Q. If all the numbers formed by rearranging the digits 4, 5 and 6 are added together, then the resultant number is divisible by 111 only. State true or false.

1. True
2. False

Q.

ABC is a 3-digit number and A - C = 2. The difference beween ABC and the number obtained by reversing its digits is ______.

1. 199
2. 198
3. 99
4. 98