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Prime numbers and prime factorisationWith thanks to Frances, whose Criba d’Erastòstenes worksheet is available here. Material modified and embedded here under the CC-BY-SA 3.0 license.
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- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)
- Worksheet (with space for student work)
- Handout (slides with exercises only; 4 per page for reduced printing)
Links to past exam and UKMT questions
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Unlimited practice questions on prime factor decomposition
In the real world
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