FOR CHILDREN AND GROWNUPS

PROBLEM # 1
In how many ways can a student pick 7 questions from 10?

PROBLEM # 2
In an exam a student needs to answer 7 questions out of 10. The student should pick   atleast 3 from first 5 questions.  How many ways can the student pick 7 questions?

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SOLUTIONS TO PROBLEMS ON 05/17/07

FOR CHILDREN

PROBLEM # 1
Find three numbers whose mode is 8 and mean is 10. What is the median of these three numbers.

SOLUTION
8. 

FOR GROWNUPS

PROBLEM # 2
What is the last digit of the product of these exponents?
2^1988 x 3^1988 x 7^1988.

SOLUTION 
6.

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