you can see that both are even, so 2 will go in and you get 6 and 21. with 6 and 21, 2 won't go in, but another 3 will, giving you 2 and 7. You then can't go any further. so you got a division by 2 and then by 3 so multiply these and you get 6, your highest common factor
The GCF is 6.
The GCF of 12 and 42 is 6
The GCF is 6.
The GCF of 1218 and 42 is 42. The GCF of 12, 18 and 42 is 6.
The GCF is... 12
You need at least two numbers to find a GCF.
The GCF is 7.
The GCF is 6.
The GCF is 6.
The GCF is: 1
The GCF is 6.
The GCF is 6.