1 . 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
• D. None of these

Answer: Option B

Explanation:

Manick এর বর্তমান বয়স  =  12; Rahul  =  123123  = 4
ধরি, Manick x বছরে পরে হবে Rahul এর twice old.
তাহলে 12  +  x  =  2(4  +  x)
 x  =  4
তাহলে Manick এর required age  =  12  +  4  =  16 years.