2023 · Q24
The combined age of a man and his wife is 6 times the combined age of their children. Two years ago their combined age was 10 times the combined age of their children; and six years later their combined age will be 3 times the combined age of their children. How many children do they have if each child is at least 2 years old?
Elementary MathematicsAlgebra
- A2
- B3
- C4
- D5
Explanation
Let M,S be present ages. M-6=3(S-6) and M+6=n(S+6)... solving with the total-age conditions gives n=3. Option (b).