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| Dividing a donut (Posted on 2005-04-23) |
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I want to divide the surface of a donut into as many different regions as possible. The regions can be any shape, as long as they are each in one piece. Each region must touch each of the other regions (touching on a corner doesn't count). How many regions can I make?
Ultra brief Solution
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 | Comment 15 of 35 | 
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7
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Posted by e.g.
on 2005-04-23 21:49:20 |
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