5, 10, 15, 20, 25, 30
You need at least two numbers to find a GCF. If that's 4, 5 and 6, the GCF is 1.
6 and 12 have a GCF of 6.
The GCF is 1.
The GCF of the numbers 6, 12, and 30 is the number 6.
The GCF of 5 and 10 is 5.
The GCF is 5.
2 numbers have a gcf of 3 = 3 & 6, 6 &9,...
The GCF is 6.
The GCF is 6.
The GCF is 6.
The GCF is 6.
The GCF is 6.