Competition Math

Learn AMC 10/12 Workshop

The techniques that win the AMC: answer extraction, Vieta, pigeonhole, invariants, telescoping, complementary counting, and modular tricks. Each one is taught through original style-faithful problems with verified answers.

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Free to start · adaptive placement finds your level · reviews timed to your own forgetting.

What you'll learn

30 lessons in AMC 10/12 Workshop

Test strategy & answer extractionVieta's formulasThe pigeonhole principleInvariants & parity argumentsTelescoping sums & productsComplementary counting & caseworkModular tricks & last digitsMixed AMC mini-setSimilar triangles & area ratiosPower of a pointStars and barsGeometric probabilitySimon's Favorite Factoring TrickAM–GM in competitionDivisor countingNumber bases & base conversionLogarithms in competitionRoots of unityBinomial theorem & Pascal's triangleArithmetic & geometric seriesInclusion-exclusionCounting with recurrencesExpected value by linearityInscribed angles & cyclic quadrilateralsCoordinates & the shoelace formulaTrigonometry on the AMC 12Solids, scaling & cross-sectionsFloor functions & Legendre's formulaRational root, remainder & factorChoosing the method
How Erudia teaches

Built to be understood — and remembered.

Every idea is taught with motivation and a worked example before the drills, and an FSRS spaced-repetition engine schedules each review for the day its model predicts you would forget it. A short placement check finds what you already know, so you start AMC 10/12 Workshop exactly where it's useful.

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Related Competition Math subjects
AMC 8 & MATHCOUNTSAIME Problem SolvingPutnam & College Problem-Solving