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Arithmetic Reasoning - Verbal and Reasoning

Q1:

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 ?

A 14 years

B 16 years

C 18 years

D 20 years

ANS:B - 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.