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
Grade 11 2020 Problem 5Grade 11 2020ColoringCombinatoricsPolygon3D
Grade 12 2020 Problem 1Grade 12 2020AlgebraComplexSums
Grade 12 2020 Problem 2Grade 12 2020AbsAreaCoordGeometry
Grade 12 2020 Problem 3Grade 12 2020CubeGraphsOptimization3D
Grade 12 2020 Problem 4Grade 12 2020DiophantineNTQuadratics
Grade 12 2020 Problem 5Grade 12 2020CombinatoricsCountingSeq
Grade 9 2020 Problem 1Grade 9 2020AlgebraDigitsPowers
Grade 9 2020 Problem 2Grade 9 2020AlgebraSystems
Grade 9 2020 Problem 3Grade 9 2020CombinatoricsCounting
Grade 9 2020 Problem 4Grade 9 2020AlgebraSystems
Grade 9 2020 Problem 5Grade 9 2020AnglesEquilateralGeometryPolygon
Grade 9 2020 Problem 6Grade 9 2020CountingCube3D
Grade 9 2020 Problem 7Grade 9 2020NTPrimesRight triangle
Grade 10 2020 Problem 1Grade 10 2020AlgebraNTPrimesQuadratics
Grade 10 2020 Problem 2Grade 10 2020CircleGeometrySquareTangent
Grade 10 2020 Problem 3Grade 10 2020ColoringCombinatoricsCounting
Grade 10 2020 Problem 4Grade 10 2020DivisibilityNTOptimization
Grade 10 2020 Problem 5Grade 10 2020AlgebraTables
Grade 10 2020 Problem 6Grade 10 2020AreaCircleGeometryPerpendicularityTrapezoid
Grade 10 2020 Problem 7Grade 10 2020CombinatoricsCountingDigitsOptimization
Grade 11 2020 Problem 1Grade 11 2020AlgebraOptimizationTrigonometry
Grade 11 2020 Problem 2Grade 11 2020CombinatoricsCountingDigits
Grade 11 2020 Problem 3Grade 11 2020AreaGeometryIncircleTrapezoid
Grade 11 2020 Problem 4Grade 11 2020AlgebraEqLog
Grade 11 2020 Problem 5Grade 11 2020DivisibilityNT
Grade 11 2020 Problem 6Grade 11 2020Optimization3D
Grade 11 2020 Problem 7Grade 11 2020DivisibilityNTPrimes
Grade 12 2020 Problem 1Grade 12 2020Complex
Grade 12 2020 Problem 2Grade 12 2020AlgebraRecurrencesSeq
Grade 12 2020 Problem 3Grade 12 2020CountingProbability
Grade 12 2020 Problem 4Grade 12 2020AlgebraFunctionsOptimization
Grade 12 2020 Problem 5Grade 12 2020ModNTPowers
Grade 12 2020 Problem 6Grade 12 2020CoordOptimization
Grade 12 2020 Problem 7Grade 12 2020DivisibilityNT