GCF stands for Greatest Common Factor.
Here are the factors of 34: 1,2,17,34
Here are the factors of 18: 12,3,6,9,18
The GCF is 2.
The GCF is 2.
The GCF is 2.
The GCF is 2.
The GCF is 1.
The GCF is 2.
The GCF is 1.
The GCF is 34.
The GCF is 2.
The GCF is 17.
The GCF is 2.
The GCF is 2.
The GCF is 1.