3) GCF of 18 and 22 is 2 GCF of 25 and 50 is 25 GCF of 54 and 36 is 18 GCF of 40 and 8 is 8 GCF of 16 and 24 is 8 4) GCF of 10 and 15 is 5 GCF of 24 and 30 is 6 GCF of 8 and 10 is 2 GCF of 5 and 24 is 1 GCF of 24 and 40 is 8 5) GCF of 8 and 12 is 4 GCF of 15 and 4 is 1 GCF of 20 and 4 is 4 GCF of 3 and 24 is 3 GCF of 12 and 4 is 4 6) GCF of 15 and 2 is 1 GCF of 12 and 30 is 6 GCF of 4 and 30 is 2 GCF of 6 and 40 is 2 GCF of 10 and 2 is 2