36, 42, 48, 18
The GCF for those three numbers is.... 1 !
You need at least two numbers to find a GCF. If that's 4, 5 and 6, the GCF is 1.
The GCF is 2.
6 and 12 have a GCF of 6.
The GCF of the numbers 6, 12, and 30 is the number 6.
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.
The greatest factor of these numbers is the number 6, which is a factor of 6 - though not of the other two numbers.