Aptitude | Arithmetic Aptitude 5 | Question 1
The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 45. What is the difference between the two digits of that number?
(A) 5
(B) 7
(C) 6
(D) None of these
Answer: (A)
Explanation:
Let the ten’s digit be x and unit’s digit be y Then (10x + y) – (10y + x) = 45 9(x – y) = 45 x – y = 5