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12 year old Manick is three times as old as his brother Rahul. How old will Manick be when he is twice as old as Rahul?

14 years
16 years
18 years
20 years

Correct Answer: 16 years

Explanation:

Manick's present age = 12 years, Rahul's present age = 4 years.

Let Manick be twice as old as Rahul after x years from now.

Then, 12 + x = 2 (4 + x) ⟺ 12 + x = 8 + 2x ⟺ x = 4.

Hence, Manick's required age = 12 + x = 16 years.

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