1. Prime Factorization Practice
6th grade

2. Find the prime factorization of 60.

3. ANSWER (one possible factor tree)
Prime Factorization: ×3 × 5

4. Find the prime factorization of 128.

5. ANSWER (one possible factor tree)
Prime Factorization: 2 7

6. Find the prime factorization of 75.

7. ANSWER (one possible factor tree)
Prime Factorization:

8. Find the prime factorization of 220.

9. ANSWER
Prime Factorization:

10. What is the prime factorization of 54?
2 3 · 3
2· 3 · 9
2· 3 3
2· 3 2

11. What is the prime factorization of 54?
2 3 · 3
2· 3 · 9
2· 3 3
2· 3 2

12. What is the prime factorization of 300?
2 3 · 5
30· 10
2 2 · 3 · 5 2
2· 3 2 · 5

13. What is the prime factorization of 300?
2 3 · 5
30· 10
2 2 · 3 · 5 2
2· 3 2 · 5

14. What is the prime factorization of 165?
5 x 33
2 x 3 x 11
3 x 5 x 11
3 x 55

15. What is the prime factorization of 165?
5 x 33
2 x 3 x 11
3 x 5 x 11
3 x 55

16. What is the prime factorization of 210?
2 x 3 x 5 x 7
2 2 x 3 x 5 x 7
2 x 3 x 35
2 x x 7

17. What is the prime factorization of 210?
2 x 3 x 5 x 7
2 2 x 3 x 5 x 7
2 x 3 x 35
2 x x 7