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    All Problems Prealgebra Number Theory Counting and Probability Precalculus Geometry Algebra Intermediate Algebra
    Status Title Difficulty
    2013. Trigonometric Equation Solutions 7 Level 2
    2014. Tan Equation Minimum Solution Level 3
    2015. Minimum Vector Norm Level 3
    2016. Plane From Vector Projection Level 3
    2017. Line Perpendicularity and Point Level 5
    2018. Vectors' Maximum Angle Level 4
    2019. Matrix Determinant Transformation Level 2
    2020. Unique Positive Real Pair Level 4
    2021. Vector Cross Product Norm Level 2
    2022. Tangent Sum Computation Level 2
    2023. Trigonometric Expression Evaluation 2 Level 3