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MathNet 2019-part-08 — 179 problems (EN–VI) Question 66

Math Olympiad Vault · MathNet 2019-part-08 — 179 problems (EN–VI)

Question 66

Call a positive integer $n$ weird if $n$ does not divide $(n-2)!$. Determine the number of weird numbers between 2 and 100 inclusive.