The GCF is 3.
The GCF is 3.
The GCF is 3.
The greatest common factor of 39, 42, and 72 is 3
The GCF is 3.
The GCF is 39.
The GCF of 1218 and 42 is 42. The GCF of 12, 18 and 42 is 6.
The GCF of 39 & 14 is 1.
The GCF is 21.
The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
The GCF is 1
The GCF is: 13
The GCF is 3.
The GCF is 1.