FOR CHILDREN

PROBLEM # 1
Each tire for my monster truck will last exactly 14,000 miles. How many spares do I need so I can use the fewest number of tires in a total of 21,000 miles?  Explain how you got your answer.

FOR GROWNUPS

PROBLEM # 2
You begin to solve a complicated math problem between 4:00 and 5:00 p.m. when the clock's hour and minute hands are together (on top of each other). You finish the problem when the minute hand is exactly opposite the hour hand.
(Please try to answer to the nearest second!)

Part 1: How many minutes does it take you to solve the problem?
Part 2: At what time do you finish the problem?

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SOLUTIONS TO PROBLEMS ON 12/01/05

FOR CHILDREN

PROBLEM # 1
How long will it take a mile long train going 15 miles per hour to get completely through a mile long tunnel?

SOLUTION
8 minutes.

FOR GROWNUPS

PROBLEM # 2
What is the value of:
0.5 x sqrt(42+sqrt(42+sqrt(42+sqrt(42+...))))

SOLUTION
3.5.

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