Mathematics A-Level

Counterexample

What Counterexample means in Mathematics A-Level, as defined for WJEC.

Definition of Counterexample

Check what you remember

Read the wording for your board, then hide it and explain Counterexample in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

Reference: WJEC

A value in the stated domain for which a claimed universal statement is false.

WJEC · Overarching themes - Mathematical argument, language and proof (study guide)

Topics that use Counterexample

Overarching themes - Mathematical argument, language and proof (WJEC A-Level)

Related terms

Using Counterexample in the exam

Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

Practise Mathematics questions

Create a free account to answer exam-style questions on this topic and get feedback on your answers.

Start free

A week of Premium from your first lesson · Then the free plan continues · No card, no charge

All Mathematics A-Level terms