Prime factors rich task

A complete lesson on prime factors, but not the usual questions. Intended as a challenging task to come after pupils are familiar with the process of expressing a number as a product of prime factors (see my other resources for a lesson on this).

Activities included:

A nice ‘puzzle’ where pupils work out three seemingly unrelated multiplication sums (a good chance to practice another non-calculator skill), only to find they give the same answer. Intended to stimulate some discussion about prime factors.


  • Four mini-activities, where pupils use one number’s prime factor form to obtain the prime factor form of some related numbers.
  • An opportunity for pupils to be creative and come up with their own puzzles.

A final puzzle to check pupils’ understanding of the key idea of the lesson.

Printable worksheets and answers included.

Please review it if you buy as any feedback is appreciated!

Save for later
  • 2-related-PPF.pptx

About this resource


Created: Feb 14, 2018

Updated: May 5, 2018


pptx, 280 KB


Report a problem

Tes Paid License

How can I re-use this?