Sheet # 51

Name: ________________________ Date_____________

Prime numbers are numbers that have only 2 factors- 1 and itself.

Example: 3: 1 x 3= 3

3 x 1= 3

1 and 3 are the only factors of 3. Composite numbers are numbers that have more than 2 factors.

Example: 9: 1 x 9 = 9

9 x 1 = 9

3 x 3 = 9

9 has more than two factors. The factors of 9 are 1,3, and 9.

I. Identify the numbers as prime or composite.

1. 18______________________________________

2. 10______________________________________

3. 5_______________________________________

4. 4_______________________________________

5. 20______________________________________

6. 12______________________________________

7. 11______________________________________

8. 13______________________________________

9. 25______________________________________

10. 6 ______________________________________

11. 7 ______________________________________

II. Write the composite number as a product of prime numbers.

12. 14_____________________________________________

13. 30_____________________________________________

14. 35_____________________________________________

15. 24_____________________________________________

16. 28_____________________________________________