You need at least two numbers to find a GCF.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 3.
The GCF is 29.
The GCF is 1.
The GCF is 3.
The GCF is of 27 and 87 is 3.The GCF is 3.
The GCF is 3.3The GCF is 3.
The GCF is 3.
The GCF is 3.
The GCF of 12 and 87 = 3