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AoPS Wiki:Problem of the Day/September 1, 2011

< AoPS Wiki:Problem of the Day
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In how many ways can the letters in the word "mathematical" be arranged if exactly one of the following criteria must be met:

1) The two a's are NOT next to each other.

2) The two m's are NOT next to each other.

3) No a is next to an m.

This Problem of the Day needs a solution. If you have a solution for it, please help us out by adding it.

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