one, it is relativly prime. (:
The GCF of 1218 and 42 is 42. The GCF of 12, 18 and 42 is 6.
The GCF is 21.
gcf of 37 and 81 is 1.
The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
The GCF is 37.
The GCF of 42 and 35 is 7.factors of 42: 2,6,7factors of 35: 5,7
The GCF is 37.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
Since 7 is a factor of 42, it is automatically the GCF.