IMO2020 Shortlisted Problems with Solutions
International Mathematical Olympiad. IMO General Regulations §6.6 Contributing Countries The Organising Committee and the Problem Selection Committee of IMO 2020 thank the following 39 countries for contributing 149 problem proposals: Armenia, Australia, Austria, Belgium, Brazil, Canada, Croatia, Cuba,
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IMO2020 Shortlisted Problems with Solutions
imo-official.orgcolored white. Prove that there exist 24 convex quadrilaterals Q 1, ..., Q 24 whose corners are vertices of the 100-gon, so that • the quadrilaterals Q 1, ..., Q 24 are pairwise disjoint, and • every quadrilateral Qi has three corners of one color and one corner of the other color. (Austria) C3. Let nbe an integer with ně 2.
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