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AMC 10 2021a Problem 20

  • Paper

In how many ways can the sequence 1,2,3,4,51,2,3,4,5 be rearranged so that no three consecutive terms are increasing and no three consecutive terms are decreasing? (A) 10(B) 18(C) 24(D) 32(E) 44\textbf{(A)} ~10 \textbf{(B)} ~18 \textbf{(C)} ~24 \textbf{(D)} ~32 \textbf{(E)} ~44

Dataset text NuminaMath-1.5. Quoted with source.

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32

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