You need at least two numbers to find a GCF.
The GCF is 13.
The GCF is 52.
The GCF for 132 156 is 12.
The GCF is 4.
The GCF is 13.
The GCF is 12.
The GCF is 13.The GCF is 13.
The GCF is 4.
The GCF of 65, 143, and 156 is 13.
The GCF is: 12
The GCF is: 12
The GCF is 2.