It is: 5
The GCF is 1.
The greatest common factor (usually abbreviated GCF) of 15, 35, and 20, is 5.
The GCF is 5.
The GCF is 5.
it is 5
The hcf of 15 and 20 is 5
The GCF is 5.
The answer is 5.
The GCF is 25.
The GCF is 5.
The GCF is 5.
5 (leaves you with 2, 4 and 7)