The factors of 28 are: 1, 2, 4, 7, 14, 28
The factors of 74 are: 1, 2, 37, 74
The factors of 91 are: 1, 7, 13, 91
The common factor is: 1
The GCF of 28, 84, and 91 is 7.
The GCF is 2.
The GCF is 7.
The GCF is 7.
7
The GCF of 91, 70, and 28 is 7.
The GCF is 7.
The GCF is 7.
The GCF is 7.
The GCF is 1.
The GCF is 7.
The GCF is 7.