A mother is now 5 times as old as her son. In 9 years she will be 2 times as old as he will be. How old is the son now?
Answer and explanation
Correct answer: B. 3
- Step 1: Let the son be x years old, so the mother is 5x.
- Step 2: In 9 years: 5x + 9 = 2(x + 9), so 3x = 9 and x = 3.
Answer
3.
Why not the others: 12 is the son's age in 9 years and 15 is the mother's age now.
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