

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


A. 
2 × 2 × 2 × 3 × 5 
B. 
2 × 60 


C. 
2 × 2 × 3 × 5 
D. 
2 × 3 × 5 


Hint 


2. 
What are the prime factors of 120? 


A. 
2, 2, 2, 3, 5 
B. 
2, 2, 30 


C. 
2, 3, 5 
D. 
2, 60 


Hint 


3. 
Which of the following numbers is composite? 


A. 
1 
B. 
23 


C. 
31 
D. 
9 


Hint 


4. 
Write the prime factorization of 810. 


A. 
2 × 3^{4} × 5 
B. 
2 × 5 × 9^{2} 


C. 
3^{2} × 4 × 5 
D. 
2 ×3 × 5 


Hint 


5. 
Factor 18ab^{2}. 


A. 
2 · 3 · 3 · a · b 
B. 
2 · 3 · 3 · a · b · b 


C. 
2^{2} · 3 · a · b · b 
D. 
2 · 3 · a · b · b 


Hint 


