International Competitions 2021

#CompetitionYearsProblemsYears
1International Mathematical Olympiad1959–2025398
2Middle European Mathematical Olympiad2009–2025160
❏▤
ProblemSourceTags
International Mathematical Olympiad 2021 Problem 1International Mathematical Olympiad 2021CombinatoricsNT
International Mathematical Olympiad 2021 Problem 2International Mathematical Olympiad 2021AbsAlgebraInequalitiesRadicals
International Mathematical Olympiad 2021 Problem 3International Mathematical Olympiad 2021AnglesCircumcircleGeometryTriangle
International Mathematical Olympiad 2021 Problem 4International Mathematical Olympiad 2021CircleCircumcircleGeometryQuadTangent
International Mathematical Olympiad 2021 Problem 5International Mathematical Olympiad 2021CombinatoricsPermutations
International Mathematical Olympiad 2021 Problem 6International Mathematical Olympiad 2021CombinatoricsNTOptimization
Middle European Mathematical Olympiad 2021 Problem I-1Middle European Mathematical Olympiad 2021AlgebraRecurrencesSeq
Middle European Mathematical Olympiad 2021 Problem I-2Middle European Mathematical Olympiad 2021BoardColoringCombinatoricsOptimization
Middle European Mathematical Olympiad 2021 Problem I-3Middle European Mathematical Olympiad 2021CircumcircleConcyclicGeometryPerpendicularityTangent
Middle European Mathematical Olympiad 2021 Problem I-4Middle European Mathematical Olympiad 2021CombinatoricsCountingPolygon
Middle European Mathematical Olympiad 2021 Problem T-1Middle European Mathematical Olympiad 2021AlgebraFunctionalInequalities
Middle European Mathematical Olympiad 2021 Problem T-2Middle European Mathematical Olympiad 2021AlgebraConstructionPolynomials
Middle European Mathematical Olympiad 2021 Problem T-3Middle European Mathematical Olympiad 2021CombinatoricsConstructionOptimization
Middle European Mathematical Olympiad 2021 Problem T-4Middle European Mathematical Olympiad 2021CombinatoricsConstructionPolygon
Middle European Mathematical Olympiad 2021 Problem T-5Middle European Mathematical Olympiad 2021CircumcircleGeometryPerpendicularityTriangle
Middle European Mathematical Olympiad 2021 Problem T-6Middle European Mathematical Olympiad 2021AnglesCircumcircleGeometryTriangle
Middle European Mathematical Olympiad 2021 Problem T-7Middle European Mathematical Olympiad 2021EqNTPrimesSums
Middle European Mathematical Olympiad 2021 Problem T-8Middle European Mathematical Olympiad 2021DigitsNTPowers