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Croatian Mathematical Olympiad 2013 Problem M-1Croatian Mathematical Olympiad 2013AlgebraInequalitiesSums
Croatian Mathematical Olympiad 2022 Problem 2-1Croatian Mathematical Olympiad 2022AlgebraInequalitiesSums
International Mathematical Olympiad 1963 Problem 5International Mathematical Olympiad 1963AlgebraSumsTrigonometry
International Mathematical Olympiad 1966 Problem 4International Mathematical Olympiad 1966AlgebraSumsTrigonometry
International Mathematical Olympiad 1968 Problem 6International Mathematical Olympiad 1968AlgebraSeqSums
International Mathematical Olympiad 1978 Problem 5International Mathematical Olympiad 1978AlgebraInequalitiesSeqSums
International Mathematical Olympiad 1979 Problem 1International Mathematical Olympiad 1979DivisibilityNTSums
International Mathematical Olympiad 1988 Problem 4International Mathematical Olympiad 1988AlgebraInequalitiesSums
International Mathematical Olympiad 1989 Problem 1International Mathematical Olympiad 1989CombinatoricsConstructionSums
International Mathematical Olympiad 1992 Problem 6International Mathematical Olympiad 1992NTOptimizationSums
International Mathematical Olympiad 1999 Problem 2International Mathematical Olympiad 1999AlgebraInequalitiesOptimizationSums
International Mathematical Olympiad 2015 Problem 6International Mathematical Olympiad 2015InequalitiesNTSeqSums
International Mathematical Olympiad 2024 Problem 1International Mathematical Olympiad 2024AlgebraOptimizationSums
Middle European Mathematical Olympiad 2021 Problem T-7Middle European Mathematical Olympiad 2021EqNTPrimesSums
Grade 9 1995 Problem 2Grade 9 1995AlgebraEqSums
Grade 9 2016 Problem 1Grade 9 2016AlgebraSums
Grade 9 2025 Problem 5Grade 9 2025DigitsNTPowersSums
Grade 9 2017 Problem 1Grade 9 2017AlgebraRadicalsSums
Grade 10 1999 Problem 4Grade 10 1999AlgebraCombinatoricsSums
Grade 10 2014 Problem 2Grade 10 2014AlgebraOptimizationSums
Grade 11 2002 Problem 2Grade 11 2002NTPowersSums
Grade 11 2026 Problem 1Grade 11 2026AlgebraSums
Grade 11 2024 Problem 4Grade 11 2024AlgebraSumsTrigonometry
Grade 11 2025 Problem 3Grade 11 2025AlgebraSumsTrigonometry
Grade 12 1999 Problem 3Grade 12 1999AlgebraRecurrencesSeqSums
Grade 12 2000 Problem 4Grade 12 2000NTSums
Grade 12 2002 Problem 1Grade 12 2002AlgebraSeqSums
Grade 12 2002 Problem 4Grade 12 2002NTSeqSums
Grade 12 2005 Problem 1Grade 12 2005RecurrencesSeqSums
Grade 12 2008 Problem 2Grade 12 2008AlgebraRadicalsSums
Grade 12 2015 Problem 4Grade 12 2015AlgebraEqSums
Grade 12 2016 Problem 2Grade 12 2016AlgebraSeqSums
Grade 12 2023 Problem 2Grade 12 2023ComplexCountingDigitsSums
Grade 12 2024 Problem 5Grade 12 2024DivisibilityFactorialNTSums
Grade 12 2021 Problem 2Grade 12 2021AlgebraSeqSums
Grade 12 2022 Problem 6Grade 12 2022AlgebraCombinationsSums
Grade 12 2024 Problem 2Grade 12 2024NTPrimesSums
Grade 12 2015 Problem 3Grade 12 2015AlgebraSumsTrigonometry
Grade 12 2016 Problem 1Grade 12 2016AlgebraPolynomialsSums
Grade 12 2018 Problem 2Grade 12 2018AlgebraInequalitiesSums
Grade 12 2020 Problem 1Grade 12 2020AlgebraComplexSums