The GCF is 7.
The GCF is 7.
The GCF is 21.
The GCF is 7.
168 - 1, 2, 4, 6, 8, 12, 14, 21, 28, 42, 848 - 1, 2, 4, 8the GCF is 8
7 is the gcf of 28 35 and 42
The GCF is 7.
The GCF is 21.
The GCF is 21.
The GCF is 21.
The GCF is 3.
The factors of 28 are 1, 2, 4, 7, 14, 28. The factors of 42 are 1, 2, 6, 7, 21, 42. The factors of 7 are 1, 7. The GCF of 7, 28, and 42 is 7.