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For The Mathematically Inclined

Anil Saigal
08/19/2008

FOR STUDENTS

PROBLEM # 1

Amrita, Sanjay, and Juhi each ate something different for breakfast. One had toast, one had sausages, and one had a melon for breakfast.

What did each person have for breakfast?

1.           Amrita likes to eat either a melon or toast for breakfast.
2.           Only Sanjay and Juhi like meat for breakfast.
3.           Juhi did not have sausages or toast for breakfast.

FOR GROWNUPS

PROBLEM # 2
Find the sum of the series
S = cos3x −1/3 cos33x + 1/32 cos3 32x −1/33 cos3 33x + .....

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Please send your solutions to anil@lokvani.com.

Use Problem Solutions M-082108 as the subject line. Please include your full name in the text of the main message. Everyone with the right answer will be acknowledged in the next issue of Lokvani.

Please do not post your solution in Post Comments. No credit will be given for solutions not sent to anil@lokvani.com.

If you need clarification on any problem, please contact anil@lokvani.com.

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Problem Solutions 08/07/08

PROBLEM # 1
A dart is thrown at a circular dart board of radius one. The dart can land at any place on the dartboard with equal probability. What is the mean distance between where the dart hits from the center of the board?

Solution: 
 

FOR
GROWNUPS 
Water flows into a tank at a rate of 1 gallon per second. Water leaves the tank at a rate of 1 gallon per second for each 100 gallons in the tank. The tank is initially empty. How long will it take for the tank to fill with 50 gallons of water? 

Solution:
69.3 s. 

Congratulations to Roopesh Mathur and Mukund Seshadari who were winners of the last set of puzzles.



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