The difference between a two-digit number and the number obtained by interchanging the positions of its digits is What is the difference between the two digits of that number?

The difference between a two-digit number and the number obtained by interchanging the positions of its digits is What is the difference between the two digits of that number?

A 3

B 4

C 6

D 9

Solution

Correct Answer: Option B

Let the ten's digit be x and unit's digit be y.

Then, (10x + y) - (10y +