Croatian Competitions 2021

#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
Grade 11 2021 Problem 5Grade 11 2021CombinatoricsGraphsParity
Grade 12 2021 Problem 1Grade 12 2021FactorialNTPowersPrimes
Grade 12 2021 Problem 2Grade 12 2021AlgebraComplexSystems
Grade 12 2021 Problem 3Grade 12 2021AlgebraInequalities
Grade 12 2021 Problem 4Grade 12 2021CombinatoricsCountingPermutations
Grade 12 2021 Problem 5Grade 12 2021AnglesCircleCircumcircleGeometryTriangle
Grade 9 2021 Problem 1Grade 9 2021AlgebraEqSystems
Grade 9 2021 Problem 2Grade 9 2021AnglesGeometryTriangle
Grade 9 2021 Problem 3Grade 9 2021CombinatoricsCounting
Grade 9 2021 Problem 4Grade 9 2021CompositeConstructionNT
Grade 9 2021 Problem 5Grade 9 2021CountingDigitsDivisibilityNT
Grade 9 2021 Problem 6Grade 9 2021AreaCoordGeometryTriangle
Grade 9 2021 Problem 7Grade 9 2021CompositeNTPrimes
Grade 10 2021 Problem 1Grade 10 2021AlgebraEqNTPrimesQuadratics
Grade 10 2021 Problem 2Grade 10 2021DigitsDivisibilityNT
Grade 10 2021 Problem 3Grade 10 2021AreaGeometryOptimizationSquareTriangle
Grade 10 2021 Problem 4Grade 10 2021CombinatoricsOptimizationTables
Grade 10 2021 Problem 5Grade 10 2021AlgebraQuadraticsSystems
Grade 10 2021 Problem 6Grade 10 2021GeometryIncircleLengthsTriangle
Grade 10 2021 Problem 7Grade 10 2021AlgebraRational
Grade 11 2021 Problem 1Grade 11 2021AlgebraTrigonometry
Grade 11 2021 Problem 2Grade 11 2021AlgebraEqExp
Grade 11 2021 Problem 3Grade 11 2021Lengths3D
Grade 11 2021 Problem 4Grade 11 2021CombinatoricsOptimizationTiling
Grade 11 2021 Problem 5Grade 11 2021CountingDigitsDivisibilityNT
Grade 11 2021 Problem 6Grade 11 2021CentroidEquilateralGeometryTriangle
Grade 11 2021 Problem 7Grade 11 2021AlgebraEqNT
Grade 12 2021 Problem 1Grade 12 2021AbsAlgebraComplex
Grade 12 2021 Problem 2Grade 12 2021AlgebraSeqSums
Grade 12 2021 Problem 3Grade 12 2021CoordGeometry
Grade 12 2021 Problem 4Grade 12 2021DivisibilityNTRecurrences
Grade 12 2021 Problem 5Grade 12 2021ModNTPowers
Grade 12 2021 Problem 6Grade 12 2021AlgebraInequalitiesSeq
Grade 12 2021 Problem 7Grade 12 2021CombinatoricsOptimization3D