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What proof means

What proof means

Flowchart of algebraic proof forms showing integer n, even 2n, odd 2n+1, consecutive numbers, and target forms like 2k+1, mk, and p^2

A proof is a logical argument that shows a statement is true for every allowed value. Testing a few numbers can suggest a pattern, but it cannot guarantee the pattern always continues.

Proof Lesson

  1. IGCSE
  2. /Maths
  3. /Proof

Step-by-step lessons covering Edexcel IGCSE Maths Proof for IGCSE Maths. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons

Quadratic Simultaneous EquationsTransforming Graphs y=f(x)ProofCompleting the SquareInverse and Composite FunctionsQuadratic InequalitiesSequences (Higher)DifferentiationVectors Proof QuestionsProbability Equation Questions