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2024 SSMO Speed Round Problems/Problem 4

Revision as of 14:38, 9 September 2025 by Pinkpig (talk | contribs)

Problem

Sam wants to read the Harry Potter and Warriors books. There are 7 Harry Potter books that must be read in a specific order, and there are 6 Warriors books that also must be read in a specific order; however, he can read the two series at the same time. For example, he could read the first three Harry Potter books, then the first five Warriors books, then the remaining Harry Potter books, and finally the last Warriors book. In how many unique orders can Sam read the books?

Solution

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