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Croatian Mathematical Olympiad 2010 Problem 2-2Croatian Mathematical Olympiad 2010CombinatoricsGamesPolygon
Croatian Mathematical Olympiad 2011 Problem I-2Croatian Mathematical Olympiad 2011ColoringCombinatoricsOptimizationPolygon
Croatian Mathematical Olympiad 2011 Problem M-2Croatian Mathematical Olympiad 2011CombinatoricsGeometryOptimizationPolygon
Croatian Mathematical Olympiad 2012 Problem 1-2Croatian Mathematical Olympiad 2012CombinatoricsOptimizationPolygon
Croatian Mathematical Olympiad 2014 Problem 1-2Croatian Mathematical Olympiad 2014ColoringCombinatoricsGraphsPolygon
Croatian Mathematical Olympiad 2015 Problem M-2Croatian Mathematical Olympiad 2015CombinatoricsOptimizationPolygon
Croatian Mathematical Olympiad 2021 Problem 2-2Croatian Mathematical Olympiad 2021ColoringCombinatoricsPolygon
Croatian Mathematical Olympiad 2023 Problem 1-3Croatian Mathematical Olympiad 2023CircumcircleGeometryParallelogramPolygon
International Mathematical Olympiad 1963 Problem 3International Mathematical Olympiad 1963AnglesGeometryPolygon
International Mathematical Olympiad 1979 Problem 6International Mathematical Olympiad 1979CombinatoricsCountingPolygonRecurrences
International Mathematical Olympiad 1982 Problem 5International Mathematical Olympiad 1982CollinearCoordGeometryPolygon
International Mathematical Olympiad 1984 Problem 5International Mathematical Olympiad 1984GeometryInequalitiesLengthsPolygon
International Mathematical Olympiad 1986 Problem 3International Mathematical Olympiad 1986CombinatoricsOptimizationPolygon
International Mathematical Olympiad 1986 Problem 4International Mathematical Olympiad 1986CoordGeometryPolygon
International Mathematical Olympiad 1990 Problem 6International Mathematical Olympiad 1990ConstructionGeometryPolygon
International Mathematical Olympiad 1995 Problem 5International Mathematical Olympiad 1995AnglesGeometryInequalitiesOptimizationPolygon
International Mathematical Olympiad 1996 Problem 5International Mathematical Olympiad 1996CircumcircleGeometryInequalitiesPolygon
International Mathematical Olympiad 2003 Problem 3International Mathematical Olympiad 2003GeometryPolygon
International Mathematical Olympiad 2006 Problem 2International Mathematical Olympiad 2006CombinatoricsCountingOptimizationPolygon
International Mathematical Olympiad 2006 Problem 6International Mathematical Olympiad 2006AreaGeometryInequalitiesOptimizationPolygon
International Mathematical Olympiad 2016 Problem 3International Mathematical Olympiad 2016AreaCircleCoordGeometryPolygon
Middle European Mathematical Olympiad 2009 Problem I-2Middle European Mathematical Olympiad 2009ColoringCombinatoricsGeometryOptimizationPolygon
Middle European Mathematical Olympiad 2010 Problem T-3Middle European Mathematical Olympiad 2010CombinatoricsNTPolygonCoprime
Middle European Mathematical Olympiad 2015 Problem I-2Middle European Mathematical Olympiad 2015GeometryOptimizationPolygon
Middle European Mathematical Olympiad 2019 Problem I-2Middle European Mathematical Olympiad 2019GeometryOptimizationPolygon
Middle European Mathematical Olympiad 2021 Problem I-4Middle European Mathematical Olympiad 2021CombinatoricsCountingPolygon
Middle European Mathematical Olympiad 2021 Problem T-4Middle European Mathematical Olympiad 2021CombinatoricsConstructionPolygon
Middle European Mathematical Olympiad 2024 Problem I-2Middle European Mathematical Olympiad 2024ConstructionGeometryPolygon
Grade 9 1993 Problem 3Grade 9 1993GeometryOptimizationPolygon
Grade 9 1996 Problem 3Grade 9 1996CoordGeometryLengthsPolygon
Grade 9 1998 Problem 4Grade 9 1998AreaGeometryPolygon
Grade 9 2009 Problem 4Grade 9 2009GeometryLengthsPolygon
Grade 9 2010 Problem 1Grade 9 2010GeometryParityPolygon
Grade 9 2011 Problem 2Grade 9 2011AnglesEquilateralGeometryPolygon
Grade 9 2013 Problem 4Grade 9 2013AreaGeometryPolygon
Grade 9 2022 Problem 5Grade 9 2022CombinatoricsGraphsOptimizationPolygon
Grade 9 2020 Problem 5Grade 9 2020AnglesEquilateralGeometryPolygon
Grade 9 2022 Problem 3Grade 9 2022AreaGeometryPolygonSquare
Grade 9 2023 Problem 6Grade 9 2023GeometryLengthsPolygon
Grade 9 2024 Problem 5Grade 9 2024GeometryPolygonTrapezoid
Grade 10 1997 Problem 1Grade 10 1997AnglesAreaGeometryPolygon
Grade 10 2001 Problem 4Grade 10 2001AreaCoordGeometryPolygon
Grade 10 2004 Problem 1Grade 10 2004AreaGeometryPolygon
Grade 10 2023 Problem 3Grade 10 2023CombinatoricsGeometryPolygonTriangle
Grade 10 2021 Problem 5Grade 10 2021ColoringCombinatoricsPolygon
Grade 10 2022 Problem 4Grade 10 2022AnglesCircleGeometryPolygon
Grade 11 2000 Problem 3Grade 11 2000CubeGeometryPolygon3D
Grade 11 2005 Problem 4Grade 11 2005ColoringCombinatoricsPolygon
Grade 11 2017 Problem 5Grade 11 2017ColoringCombinatoricsCountingPolygon
Grade 11 2020 Problem 5Grade 11 2020ColoringCombinatoricsPolygon3D