The GCF of 12, 18, 36, and 42 is 6.
The GCF is 3.
36, 42, 48, 18
The GCF of 18 and 36 is 18.
The GCF is 18.
The GCF is 18.
The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
It would be 18.
The GCF is 18.
The GCF is 6.
The GCF is: 6
The GCF is 6.