Find the GCF of the following problems.

1. 6,8

2. 21,45

3. 16,56

4. 28,42

5. 12,24,36

6. 6,15,24

6: 2 * 3 GCF = 2

8: 2 * 2 * 2

21: 3 * 7 GCF = 3

45: 3 * 3 * 5

16: 2 * 2 * 2 * 2 GCF = 8

56: 2 * 2 * 2 * 7

28: 2 * 2 * 7 GCF = 14

42: 2 * 3 * 7

12: 2 * 2 * 3 GCF = 12

24: 2 * 2 * 2 * 3

36: 2 * 2 * 3 * 3

6: 2 * 3 GCF = 3

15: 3 * 5

24: 2 * 2 * 2 * 3

1. 2

2. 3

3. 8

4. 7

5. 12

6. 3