Brain Teasers

Mathematical:

1. Make 100 using all the digits from 0 to 9, without re-using any digit (eg. 9*8+7+6+5+4+3+2+1+0 )in how many ever methods possible.
2. A man digs 5 pits in an hour. How many pits does he dig in 3 hours 30 minutes?
3. Given that there are about 150,000 hairs in a man's head and that he sheds about 3,000 hairs a month calculate the averege life of each hair in the man's head.

General:

1. How do you cut a cresant into 6 parts?
2. If you see an angle of 1.5 degrees through a glass that magnifies things four times what will be the angle seen?

Physical:

1. When you are in the middle of a small lake how do you determine the depth of the lake when you have nothing but a graduated jar?
2. An astronaut who got out into open space and is in no way connected with the ship want's to turn 180 degrees. What should he do?(He has a compact disc with him)

The answers will be given on 14th May 2000.If you have answers before hand you can mail them to me at [email protected].(Your answers can be better than mine)

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