

1. 
Use the factor tree to write the prime factorization of 120. 


A. 
2 × 3 × 5 
B. 
2 × 2 × 2 × 3 × 5 


C. 
2 × 2 × 3 × 5 
D. 
2 × 60 


Hint 


2. 
What are the prime factors of 120? 


A. 
2, 2, 2, 3, 5 
B. 
2, 60 


C. 
2, 2, 30 
D. 
2, 3, 5 


Hint 


3. 
Which of the following numbers is prime? 


A. 
15 
B. 
1 


C. 
5 
D. 
9 


Hint 


4. 
Write the prime factorization of 204. 


A. 
2 × 2 × 3 × 17 
B. 
2 × 3 × 17 


C. 
2 × 17 
D. 
6 × 17 


Hint 


5. 
What are the prime factors of 810? 


A. 
2, 5, 9 
B. 
3, 4, 5 


C. 
3, 5 
D. 
2, 3, 5 


Hint 


