Asked by jay


10 red, 10 blue, 10 green matches are used to build a regular icosahedron, how many possible solutions are there?

Answers

Answered by Steve
first, how many edges are there on an icosohedron?

Then, since there are duplicates, you will have

30Pn/(10!10!10!) ways to arrange the toothpicks.

But, there are rotational symmetries which make multiple solutions really the same thing.
Answered by bleh
You decided to post them the day before the due date? :P
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