The greatest common factor (GCF) is: 2
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The highest common factor of the numbers 40 and 30 is 10.
The GCF is 10.
10 10:1,2,5,10 and 70 1,2,5,7,10,14,35,70
The GCF is 3.
Factors of 30 are: 1, 2, 3, 5, 6, 10, 15, and 30. Factors of 40 are: 1, 2, 4, 5, 8, 10, 20, and 40. Find the greatest factor they both have in common. That is the greatest common factor.