Q: If A is formed by reversing the digits of B and B is 45 less than A, and the sum of the digits of B is 9, what is the value of A?
A
Answer:
A
Explanation:
If the sum of the digits of B is 9, then B must be a two-digit number. The only two-digit numbers whose digits add up to 9 are 18 and 27.
If A is formed by reversing the digits of B, then A is either 81 or 72 if B is 18 or 27, respectively.
If B is 45 less than A, then A must be 72. Therefore, the value of A is 72
Related Topic:
Share Above MCQ