Question 9
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The chart shows a father and his two sons.
After how many years will the father’s age equal the sum of his sons’ ages?
- A 9
- B 14
- C 18 Correct
- D 28
Correct Answer: Option C
After t years: 46 + t = (16 + t) + (12 + t)
46 + t = 28 + 2t → t = 18
Trap: 9 forgets that both sons age, so the sum grows by 2 a year.
Answer: 18
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