Question

The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?

Answer 1

let tens digit be x and unit digit be y
the number is 10x+y
a.t.q

10x+y -10y-x = 36
9x -9y = 36 
x- y = 4 _ _ _ _ ans