This resource was used with my high ability Year 7 students. This could be used for higher year groups or adapted for other ability groups.
I used this after my lesson on Divisibility tests (available for free).
It covers firstly the Sieve of Eratosthenes, then why we would find the prime factorisation.
There is then examples of how to express a number as a product of primes, and a worksheet on this. The lesson then progresses to using the prime factorisation to find all the factors of a number and roots of a number.
The lesson has all answers provided.
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