Question 31
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A's present age equals the sum of the present ages of B and C. Ten years ago, A's age was double the sum of B's and C's ages then. How old is A?
- A 20 years
- B 40 years
- C 30 years Correct
- D 25 years
Correct Answer: Option C
a = b + c
Ten years ago: a − 10 = 2[(b − 10) + (c − 10)] = 2(a − 20)
a − 10 = 2a − 40 → a = 30
Answer: 30 years
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