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The last classes for Spring 2013 will be on May 15 and May 19. The program will resume on Wed., Sept. 25, 2013. Have a great summer!
The Marin Math Circle brings together students who are interested in exploring new mathematical topics and challenging problems.
The Elementary and Intermediate Groups meet on Wednesday evenings and the Advanced Group meets on Sunday afternoons during the school year. All meetings are in Guzman Hall on the campus of Dominican University of California. The first sessions of 2013 will be on Wednesday, January 16 and Sunday, January 20, 2013.
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Circle
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Level
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Time
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Room
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Elementary Circle
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Recommended for grades 3 and 4 |
Wednesdays
6:10 - 7:00 pm
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Angelico Hall, room 210
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Intermediate Circle
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Recommended for
grades 5-8
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Wednesdays
6:00 - 7:30 pm
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Guzman Hall, room 111
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Advanced Circle
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Recommended for grades 9-12,
or students in lower grades
who are comfortable using algebra
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Sundays
3:30 - 5:30 pm
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Guzman Hall, room 201
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To receive email announcements about math circle sessions, please subscribe to the Marin Math Circle google group:
Come join us for puzzles like the ones below! Want to see more problems?
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There are 100 light switches on the wall, all turned off. A hundred toddlers come by. The first toddler flips every switch. Then the second toddler flips just switches 2, 4, 6, 8, ... etc. Then the third toddler flips switches 3, 6, 9, 12, ... etc. This pattern continues until finally the 100th toddler flips just switch number 100. How may lights are turned on at the end?
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A military base has a number of identical hoverplanes. Each hoverplane can carry enough fuel to fly exactly halfway around the planet. Hoverplanes do not use any fuel while hovering stationary in the air, and hoverplanes can transfer any amount of fuel between each other while in the air. What is the minimum number of planes are that are needed so that one plane is able to get all the way around the planet and all assisting planes return safely to base?
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What is the maximum number of pieces you can divide a watermelon into with four straight cuts, if you are NOT allowed to rearrange the pieces between cuts? With five cuts?
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