The GCF is 28.
It is: 28 which is the greatest common factor of 56 and 84
It is: 28
The GCF of 21, 56, 63, and 84 is 7.
The GCF is 28.
The GCF is 28.
The GCF is 28.
The GCF is 28.
The GCF is: 28
The GCF is: 14
The GCF is 28.
The GCF is 7.
The GCF is 14.