The GCF is 10.
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The GCF is 5.
The greatest common factor (GCF) is: 2
The GCF is 3.
The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. The greatest factor they all have in common is 2.
The greatest common factor of the numbers 14 and 30 is 2.