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Engaging Maths: Higher Order Thinking with Thinkers Keys

Engaging maths: Higher

All students should be encouraged to engage with higher order thinking tasks. This book uses a critical and creative thinking tool called Thinkers Keys, adapted to be specifically mathematical.

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The liar’s paradox

This statement is false.

Think about it!

If true, then ‘This statement is false’ is true. Therefore the statement must be false. That is, if it is true then it is false!

If false, then ‘This statement is false’ is false. Therefore the statement must be true That is, if it is false then it is true!