Greatest Common Factor (GCF) of 18 and 9

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To get the Greates Common Factor (GCF) of 18 and 9 we need to factor each value first and then we choose all the copies of factors and multiply them:

18:   233
9:    33
GCF:    33

The Greates Common Factor (GCF) is:   3 x 3 = 9

 

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