Greatest Common Factor (GCF) of 81 and 99

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To get the Greates Common Factor (GCF) of 81 and 99 we need to factor each value first and then we choose all the copies of factors and multiply them:

81:   3333 
99:   33  11
GCF:   33   

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

 

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