Eratosthenes sieve - finding prime numbers

Last updated: 15/11/2023
Contributor: Simon
Eratosthenes sieve - finding prime numbers
Main Subject
Category
All number resources: Prime, squared and cubed numbers
Resource type
Worksheet
This guide to using the tried and trusted method for finding prime numbers, invented over 2300 years ago by Eratosthenes, includes a PowerPoint presentation and a challenge for upper KS2. The presentation shows, step-by-step, how to use this ancient method to find prime numbers. Supported with a simple worksheet, this works brilliantly to reinforce knowledge of multiples, common multiples and using mathematical methods.

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