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Dividing a donut (Posted on 2005-04-23) Difficulty: 3 of 5
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?

See The Solution Submitted by Tristan    
Rating: 4.0000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
The official solution | Comment 22 of 35 |

I wish I had thought of that, so beautifull, so simple.

Nice problem Tristan, thanks


  Posted by Hugo on 2005-04-25 17:07:25
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