STEP 2022: 20 of 24 questions decoded, by method & chapter.

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The paper at a glance, coloured by move. Click a square to open its question; empty squares are not decoded yet.

• 3Telescoping SumsKey methodPureSequences & Series6 other sittings

  Same method, other sittings

  201220142015201620172024

  Worked solutionOpen the method
• 4Piecewise Case-SplittingKey methodPureFunctions & Curve Sketching3 other sittings

  Same method, other sittings

  200620142025

  Worked solutionOpen the method
• 5Inequality Gap → Sum of SquaresKey methodPureAlgebra & Inequalities1 other sitting

  Same method, other sittings

  2006

  Worked solutionOpen the method
• 6Homogeneous ODE → $y=xu$Key methodPureDifferential Equations3 other sittings

  Same method, other sittings

  201420152020

  Worked solutionOpen the method
• 7Modulus Bounds → ImpossibilityKey methodPureComplex Numbers1 other sitting

  Same method, other sittings

  2013

  Worked solutionOpen the method
• 9Limiting EquilibriumTunnelMechanics10 other sittings

  Same method, other sittings

  2006201220132014201720182019202020232024

  Worked solutionOpen the method
• 10Projectiles → Split by AxisTunnelMechanics11 other sittings

  Same method, other sittings

  20062008200920102012201320142017202020232024

  Worked solutionOpen the method
• 11Optimise Expected Cost or GainKey methodProb & StatsProbability & Statistics3 other sittings

  Same method, other sittings

  200920152018

  Worked solutionOpen the method
• 12CDF of a Transformed VariableTunnelProb & StatsProbability & Statistics8 other sittings

  Same method, other sittings

  20092012201420152017201920202021

  Worked solutionOpen the method

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The paper at a glance, coloured by move. Click a square to open its question; empty squares are not decoded yet.

• 1Parametrising ConicsKey methodPureCoordinate Geometry & Conics5 other sittings

  Same method, other sittings

  20062008201420172018

  Worked solutionOpen the method
• 2Infinite Descent & IrrationalityKey methodPureProof & Number Theory4 other sittings

  Same method, other sittings

  2011201320152023

  Worked solutionOpen the method
• 3Stationary Points by FactoringKey methodPureDifferentiation2 other sittings

  Same method, other sittings

  20172018

  Worked solutionOpen the method
• 4Halving Products → TelescopingKey methodPureSequences & Series2 other sittings

  Same method, other sittings

  20122019

  Worked solutionOpen the method
• 5Reflect the Interval & AddKey methodPureIntegration6 other sittings

  Same method, other sittings

  200620102015201620182020

  Worked solutionOpen the method
• 6Small-Angle ExpansionPavlovPureTrigonometryonly this sitting

  Same method, other sittings

  This one has only struck here so far.

  Worked solutionOpen the method
• 7Parallel & Perpendicular SplitKey methodPureVectors & Matrices3 other sittings

  Same method, other sittings

  201920202021

  Worked solutionOpen the method
• 8Multiple Angle → PolynomialKey methodPureComplex Numbers1 other sitting

  Same method, other sittings

  2018

  Worked solutionOpen the method
• 91D Collisions → Two ScalarsTunnelMechanics8 other sittings

  Same method, other sittings

  20062008200920112013201820192025

  Worked solutionOpen the method
• 10Stability via Potential EnergyEquilibrium at a JunctionKey methodMechanics6 other sittings

  Same method, other sittings

  200620112013201820202021

  Worked solutionOpen the method

  AlsoEquilibrium at a Junction
• 12Geometric ProbabilityKey methodProb & StatsProbability & Statistics3 other sittings

  Same method, other sittings

  200620122024

  Worked solutionOpen the method