11.

A is 3 years older to B and 3 years younger to C, while B and D are twins. How many years older is C to D?

 A. 2 B. 3 C. 6 D. 12

12.

The 30 members of a club decided to play a badminton singles tournament. Every time a member loses a game he is out of the tournament. There are no ties. What is the minimum number of matches that must be played to determine the winner ?

 A. 15 B. 29 C. 61 D. None of these

13.

In a garden, there are 10 rows and 12 columns of mango trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. The length of the garden is

 A. 20 m B. 22 m C. 24 m D. 26 m

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

15.

A tailor had a number of shirt pieces to cut from a roll of fabric. He cut each roll of equal length into 10 pieces. He cut at the rate of 45 cuts a minute. How many rolls would be cut in 24 minutes ?

 A. 32 rolls B. 54 rolls C. 108 rolls D. 120 rolls