HMMT 2006 U8
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- Answer
How many ways are there to label the faces of a regular octahedron with the integers 8 , using each exactly once, so that any two faces that share an edge have numbers that are relatively prime? Physically realizable rotations are considered indistinguishable, but physically unrealizable reflections are considered different.
Dataset text NuminaMath olympiads. Quoted with source.
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