# What is the GCF of 30 and 45?

15

'Splitting' the numbers down into their prime factors giving:

So the GCF = 15

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ You will find a list of prime numbers on any search engine. I would suggest that 'images' may be a better search option.

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The greatest common factor (GCF) of 30 and 45 is 15.

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