You need at least two numbers to find a GCF.
The GCF is 3.
The GCF is 3.
The GCF is 1.
The GCF is 3.
The GCF is 1.
The GCF is 3.
It is: 1
The Greatest Common Factor (GCF) is: 123
It is just 1
3 is the GCF of 123 and 81. Divided into each, you are left with 41 and 27 respectively. There are no further common factors aside from 1.
The GCF is 3.
The GCF is 1.