Greatest Common Factor (GCF) of 690 and 390

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To get the Greates Common Factor (GCF) of 690 and 390 we need to factor each value first and then we choose all the copies of factors and multiply them:

690:   235 23
390:   23513 
GCF:   235  

The Greates Common Factor (GCF) is:   2 x 3 x 5 = 30

 

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