2020 · Q36
The sum of the digits of a two digit number is 13 and the difference between the number and that formed by reversing the digits is 27. What is the product of the digits of the number?
Elementary MathematicsNumber System
- A35
- B40
- C45
- D54
Explanation
a+b = 13 and 9(a-b) = 27, so a-b = 3, giving a = 8, b = 5. The product of the digits is 40 - option (B). Check: 85-58 = 27 and 8+5 = 13, confirming the digits 8 and 5.