5
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It is 5 because: 35-1,5,7,35 20-1,2,4,5,10,20 & 15-1,3,5,15
The GCF is: 7
The Greatest Common Factor (GCF) of 140, 105, and 70 is 35.
The greatest common factor of the numbers 20, 35 and 50 is 5.
14, 35, 70 & 77