Since 4 is a factor of 12, it is automatically the GCF.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 2.
The GCF is 4.
The GCF of 4, 8 and 12 is 4.
The GCF of 12, 4, and 28 is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.