The Singing Hedgehog Guide to:
Prime Factors
A prime factor is simply a factor that is also a prime number.
We are often asked to express a value as the product of its prime factors.
There are three ways to do this:

    Bookwork Method
    Proper Tree Method
    Mr H's cheaty Tree Method
It may also ask for the answer to be written 'using indices'; this simply means use squares and cubes and stuff when you can.

We may then have to 
use prime factors.

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