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Math Notes

1! + 4! + 5! = 145
4! + 0! + 5! + 8! + 5! = 40585

(Thanks, Pedro.)

October 26, 2008November 3, 2010 | Science & Math

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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