Question

The average Between a two digit number and the number obtained by interchanging the digit is 9. what is the difference between the two number?​

Answer 1

Answer:

The number is greater than the number obtained in reversing the digits and the ten's digit is greater than the unit's digit

Let ten's and unit's digit be 2x and x respectively

Then, (10×2x+x)−(10x+2x)=36

9x=36

x=4

Required difference=(2x+x)−(2x−x)=2x=8