Greatest Common Factor (GCF) of 42 and 65

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To get the Greates Common Factor (GCF) of 42 and 65 we need to factor each value first and then we choose all the copies of factors and multiply them:

42:   23 7 
65:     5 13
GCF:        

The Greates Common Factor (GCF) is:   1

 

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