Croatian Competitions 2020

#CompetitionYearsProblemsYears
Croatian National Competitions
1Grade 91992–2026159
2Grade 101992–2026159
3Grade 111992–2026158
4Grade 121992–2026159
Croatian County-Level Competitions
5Grade 92015–202660
6Grade 102015–202660
7Grade 112015–202660
8Grade 122015–202660
Croatian School-Level Competitions
9Grade 92020–202649
10Grade 102020–202649
11Grade 112020–202649
12Grade 122020–202649
13Croatian Mathematical Olympiad2010–2025252
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ProblemSourceTags
Croatian Mathematical Olympiad 2020 Problem 1-1Croatian Mathematical Olympiad 2020AlgebraInequalitiesOptimization
Croatian Mathematical Olympiad 2020 Problem 1-2Croatian Mathematical Olympiad 2020CombinatoricsGamesPermutations
Croatian Mathematical Olympiad 2020 Problem 1-3Croatian Mathematical Olympiad 2020CircumcircleGeometryIncirclePerpendicularityTriangle
Croatian Mathematical Olympiad 2020 Problem 1-4Croatian Mathematical Olympiad 2020DivisibilityNTPrimes
Croatian Mathematical Olympiad 2020 Problem 2-1Croatian Mathematical Olympiad 2020AlgebraFunctional
Croatian Mathematical Olympiad 2020 Problem 2-2Croatian Mathematical Olympiad 2020CombinatoricsOptimization
Croatian Mathematical Olympiad 2020 Problem 2-3Croatian Mathematical Olympiad 2020AnglesCircleGeometryPerpendicularityTriangle
Croatian Mathematical Olympiad 2020 Problem 2-4Croatian Mathematical Olympiad 2020ConstructionNT
Croatian Mathematical Olympiad 2020 Problem I-1Croatian Mathematical Olympiad 2020AlgebraOptimizationSeq
Croatian Mathematical Olympiad 2020 Problem I-2Croatian Mathematical Olympiad 2020ColoringCombinatoricsGeometryGraphs
Croatian Mathematical Olympiad 2020 Problem I-3Croatian Mathematical Olympiad 2020GeometryIncircleLengthsTriangle
Croatian Mathematical Olympiad 2020 Problem I-4Croatian Mathematical Olympiad 2020DivisibilityFunctionsNT
Croatian Mathematical Olympiad 2020 Problem M-1Croatian Mathematical Olympiad 2020AlgebraRecurrencesSeq
Croatian Mathematical Olympiad 2020 Problem M-2Croatian Mathematical Olympiad 2020CombinatoricsCountingGeometryTriangle
Croatian Mathematical Olympiad 2020 Problem M-3Croatian Mathematical Olympiad 2020CircleGeometryTangentTriangle
Croatian Mathematical Olympiad 2020 Problem M-4Croatian Mathematical Olympiad 2020DivisibilityFunctionsNT
Grade 9 2020 Problem 1Grade 9 2020AbsAlgebraOptimization
Grade 9 2020 Problem 2Grade 9 2020AlgebraDiophantineNT
Grade 9 2020 Problem 3Grade 9 2020AnglesGeometryIncircleOrthocenterTriangle
Grade 9 2020 Problem 4Grade 9 2020AlgebraInequalitiesOptimization
Grade 9 2020 Problem 5Grade 9 2020BoardColoringCombinatoricsTiling
Grade 10 2020 Problem 1Grade 10 2020AlgebraDiophantineNT
Grade 10 2020 Problem 2Grade 10 2020AlgebraCompositeNTQuadratics
Grade 10 2020 Problem 3Grade 10 2020CircleCircumcircleGeometryTangentTriangle
Grade 10 2020 Problem 4Grade 10 2020AlgebraInequalitiesOptimization
Grade 10 2020 Problem 5Grade 10 2020BoardColoringCombinatoricsTiling
Grade 11 2020 Problem 1Grade 11 2020AlgebraDiophantineNTSystems
Grade 11 2020 Problem 2Grade 11 2020AlgebraInequalitiesRadicals
Grade 11 2020 Problem 3Grade 11 2020AnglesGeometryTriangle
Grade 11 2020 Problem 4Grade 11 2020ColoringCombinatoricsCoordParity
Grade 11 2020 Problem 5Grade 11 2020DiophantineExpNT
Grade 12 2020 Problem 1Grade 12 2020AlgebraComplexPolynomials
Grade 12 2020 Problem 2Grade 12 2020AlgebraFunctionalFunctions
Grade 12 2020 Problem 3Grade 12 2020CircleCircumcircleGeometryTangentTriangle
Grade 12 2020 Problem 4Grade 12 2020ColoringCombinatoricsCoordParity
Grade 12 2020 Problem 5Grade 12 2020DiophantineExpNT
Grade 9 2020 Problem 1Grade 9 2020AlgebraInequalitiesRational
Grade 9 2020 Problem 2Grade 9 2020DiophantineNTRational
Grade 9 2020 Problem 3Grade 9 2020AlgebraSystems
Grade 9 2020 Problem 4Grade 9 2020AnglesEquilateralGeometrySquare
Grade 9 2020 Problem 5Grade 9 2020CombinatoricsOptimization
Grade 10 2020 Problem 1Grade 10 2020AlgebraSystems
Grade 10 2020 Problem 2Grade 10 2020GCDLCMNT
Grade 10 2020 Problem 3Grade 10 2020AlgebraRadicals
Grade 10 2020 Problem 4Grade 10 2020AnglesCentroidGeometryTriangle
Grade 10 2020 Problem 5Grade 10 2020BoardCombinatoricsCounting
Grade 11 2020 Problem 1Grade 11 2020AnglesGeometryInequalitiesTriangle
Grade 11 2020 Problem 2Grade 11 2020AlgebraOptimizationTrigonometry
Grade 11 2020 Problem 3Grade 11 2020AnglesGeometryLengthsTriangle
Grade 11 2020 Problem 4Grade 11 2020DiophantineNTPowers