The GCF is: 3
GCF of 6 and 12 and 15 is 3.
The GCF is 15.
The GCF is 3.
the greatest common factor of 6,12, and 15 is 3.
The GCF is 3.
The GCF is 3.
The GCF is 3.
The GCF is 6.
The GCF is 2. The LCM is 240.
The GCF is 3.
The GCF is... 12
The GCF of 12 and 15 is 1
The GCF is 1.