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Resources tagged with Disproof by counterexample similar to Legs Eleven:

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Broad Topics > Using, Applying and Reasoning about Mathematics > Disproof by counterexample

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Legs Eleven

Stage: 3 Challenge Level: Challenge Level:2 Challenge Level:2

Take any four digit number. Move the first digit to the 'back of the queue' and move the rest along. Now add your two numbers. What properties do your answers always have?

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On the Importance of Pedantry

Stage: 3, 4 and 5

A introduction to how patterns can be deceiving, and what is and is not a proof.