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IMO 2012 — Complete Shortlist Question 25

IMO Shortlist · IMO 2012 — Complete Shortlist

Question 25

Determine all integers $m \geq 2$ such that every $n$ with $\frac{m}{3} \leq n \leq \frac{m}{2}$ divides the binomial coefficient $\left(\begin{array}{c}n \\ m-2 n\end{array}\right)$.