The GCF of 42 and 84 is 42.
The GCF is 7.7 is the GCF of 42, 49 and 84.
The GCF is 21.
The GCF of 28, 42 and 63 is 7.The GCF is 7.
The greatest common factor of 42, 77 and 84 is 7.
The GCF is 3.
The GCF is 21.
The GCF of 63, 84 and 126 is 21. The GCF of 6384 and 126 is 42.
The GCF is 21.
The GCF is 21.
If that's 42, 63 and 84, the GCF is 21.
The GCF is 42.
The GCF is 21.
The GCF is 21.
The GCF of 42 and 84 is 42.
The GCF is 7.7 is the GCF of 42, 49 and 84.
The GCF is 6.