exam Maths Puzzle

A teacher of 6 students takes 2 of his students at a time to a zoo as often as he can, without taking the same pair of children together more than once. How many times does the teacher go to the zoo?

A.

10

B.

12

C.

15

D.

20

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exam Other Question

There are three prizes to be distributed among five students. If no students gets more than one prize, then this can be done in:

A.

10 ways

B.

30 ways

C.

60 ways

D.

80 ways A family consist of a grandfather, 5 sons and daughter and 8 grandchildren. They are to be seated in a row for dinner. The grandchildren wish to occupy the 4 seats at each end and the grandfather refuses to have a grandchild on either side of him. The number of ways in which the family can be made to sit is:

A.

21530

B.

8! × 480

C.

8! × 360

D.

8! × 240