Verbal Reasoning - Arithmetic Reasoning - Discussion

Discussion :: Arithmetic Reasoning - Section 1 (Q.No.14)

14.

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

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.

 Tns said: (Jul 10, 2012) B. 16 years. 12 year old Manick is three times as old as his brother Rahul who must be 4 years old. Diff in ages = 8 years. When Rahul will become 8 years old, manick will be 16 years old and he will be twice as old as Rahul.

 Kindorji said: (May 18, 2019) How comes Rahul's present age 4 when its says Manick is 3 times greater than Rahul?

 Usha said: (Sep 27, 2019) Manick age that is 12=3 * Rahul age. 12=3 * 4. Rahul age becomes 4 then only it equals to Manick age =12.

 Raveena Chavan said: (Nov 22, 2019) 3/12 = 2/x. 3x = 24 ; cross multiplication. x = 24/3. x = 8. As twice mentioned,we have to multiply by 2. X = 8x2. X = 16 answer.