1. Unit 1 Review Number Theory Created by: Mrs. Jaeger Bridge Valley Elementary

2. Topics to Review  Even and Odd Numbers  Factors of a number  Prime and Composite Numbers  Exponential Notation  Square Numbers  Prime Factorization  Arrays  Divisibility  Factor Capture Game

3. On your scratch paper, write the numbers that are even from the list below. 2, 5, 15, 6, 12, 98, 101, 222,249 Check your answers by clicking the mouse. Secure Skill

4. On your scratch paper, write the numbers that are odd from the list below. 1, 6, 51, 787, 98, 561, 222, 249 Check your answers by clicking the mouse. Secure Skill

5. Write all of the factors for the number 16. Check your notes if you need the definition for factor. Secure Skill 1, 2, 4, 8, 16

6. Write all of the factors for the number 15. Check your notes if you need the definition for factor. Secure Skill 1, 3,5, 15

7. Name a number between 1 and 100 that is divisible by 3 but NOT 2 Secure Skill An ODD number, whose digits are divisible by 3. Example: 93 93 = 9 + 3 = 12 12 divided by 3 = 4 93 is divisible by 3 but NOT by 2 because it is an odd number.

8. Write if the following numbers are prime or composite.  2 ______________________________________  4 _______________________________________  17 ______________________________________  24 ______________________________________ Factors: 1, 2 Factors: 1, 2, 4 Factors: 1, 17 Factors: 1, 2, 3, 4, 6, 8, 12, 24 Secure Skill Remember: Prime has only 2 factors – 1 and itself Composite has more than 2 factors

9. Complete the Divisibility Table below. Use your “tests” to help you determine which numbers are divisible by the give number. NumberDivisible by 2 Divisible by 3 Divisible by 6 Divisible by 5 230 yes Even number no 2 + 3 + 0 = 5 5 divided by 3 = 1.666 *sum has a remainder no It is NOT divisible by both 2 and 3 yes Ends in a 0

10. Create 3 arrays for the number 10. Remember to label your array with a number model. Secure Skill

11. Working with exponents. Identify the missing number. 6 2 = ____ 2 2 = ____ 5 2 = ____ ___ 2 = 64 ___ 2 = 16 ___ 2 = 81 36 4 25 8 4 9 Developing Skill

12. 16842222 Write the prime factorization for the number 16. Use a Factor Tree to help you. Show using exponents: _____ 2424 Beginning Skill 2 * 2 * 2 * 2 = 16 16422422

13. List the square numbers using the factors 1 – 10. 11 44 99  16  25  36  49  64  81  100 Secure Skill

14. Questions? Be sure to ask Mrs. Jaeger in class. Keep working hard! This is very challenging material. You will do GREAT if you continue to work at it!