Greatest Common Factor (GCF) of 69 and 81

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To get the Greates Common Factor (GCF) of 69 and 81 we need to factor each value first and then we choose all the copies of factors and multiply them:

69:   3   23
81:   3333 
GCF:   3    

The Greates Common Factor (GCF) is:   3

 

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