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?
Options
A) 2  B) 3  C) 4  D) 8  E) 9
Solution   Let the ten's digit be x and units digit be y.   Then, (10x+y) - (10y+x)= 36	‹=›9(x - y) = 36   ‹=›x - y = 4.   Answer 4
<result>C</result>
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?