Examples of what pupils should know and be able to do
Write 24 as a product of primes.
Probing questions
How do you go about finding the prime factors of a given number?
What are the prime factors of 125? 81? 343? What do you notice?
Can you think of a number that has one repeated prime factor? Or all different prime factors?
What if pupils find this a barrier?
Show pupils how to use factor trees to find the prime factor decomposition
of a number.
(FTM(S)Y789
p. 53) - Acrobat pdf document (34Kb)
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