dodecahedron polyhedra

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Arranging Books: Stage 5 Solution

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There are 120 ways to arrange FIVE books on a bookshelf:

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There are 5040 ways to arrange SEVEN books on a bookshelf:

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There are 40320 ways to arrange EIGHT books on a bookshelf:

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 Hey, why don't you try this for the first ones that we drew out?  Does it work for those too?

 

 

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