The GCF is 3.
That cannot be determined. The GCF of 1, 2 and 87 is 1. The GCF of 15, 30 and 45 is 15. The GCF of 90, 180 and 270 is 90 on the chance that that is what you meant to ask.
The GCF is 3.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 29.
The GCF is 3.
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.