The age of Narendran's father is four times his age. If five years ago the father's age was seven times the age of his son at that time, what is Narendran's father's present age?
Question and options
The age of Narendran's father is four times his age. If five years ago the father's age was seven times the age of his son at that time, what is Narendran's father's present age?
- 30 years
- 35 years
- 40 years
- 50 years
Answer and explanation
Correct answer: C - 40 years
Let the son's age be s, so the father is 4s. Five years ago: 4s - 5 = 7(s - 5), so 4s - 5 = 7s - 35, 3s = 30 and s = 10. The father is 40 (check: 35 = 7 x 5).
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