

1. 
Look at the factors of 18 and 30. What is the greatest common factor? factors of 18: 1, 2, 3, 6, 9, 18 factors of 30: 1, 2, 3, 5, 6, 10, 15, 30 


A. 
3 
B. 
5 


C. 
6 
D. 
2 


Hint 


2. 
Find the GCF of 28 and 34. 


A. 
2 
B. 
4 


C. 
7 
D. 
1 


Hint 


3. 
Find the GCF of 16, 12, and 36. 


A. 
3 
B. 
6 


C. 
2 
D. 
4 


Hint 


4. 
Look at the factors of 24 and 16. What is the greatest common factor? factors of 16: 1, 2, 4, 8, 16 factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 


A. 
8 
B. 
4 


C. 
16 
D. 
2 


Hint 


5. 
Find the GCF of 32 and 42. 


A. 
14 
B. 
3 


C. 
2 
D. 
4 


Hint 

