1. Even Numbers – Any number that can be divided by 2
Odd Numbers – Any number that cannot be divided by 2

2. ODD OR EVEN. 1. Write O for odd and E for even 2
ODD OR EVEN? 1. Write O for odd and E for even 2. Find the half of the number ____ ____ ___ ____ ___ ____ ___ _____ ___ ____ ___ ____

4. WHAT NUMBERS ARE PRIME?
Let’s look at a number grid from 1 to 100 and see how they were discovered.

5. Take out the number 1 because it is a special number
HERE’S HOW YOU DO IT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
Take out the number 1 because it is a special number

6. Take out the number 1 because it is a special number
HERE’S HOW YOU DO IT 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
Take out the number 1 because it is a special number

7. Take out numbers that have a composite factor of 2
HERE’S HOW YOU DO IT 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
Take out numbers that have a composite factor of 2

8. HERE’S HOW YOU DO IT 2 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
Take out numbers that have a composite factor of 2
Extra help: Even numbers different from 2.

9. Take out numbers that have a composite factor of 3
HERE’S HOW YOU DO IT 2 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
Take out numbers that have a composite factor of 3

10. Take out numbers that have a composite factor of 3
HERE’S HOW YOU DO IT 2 3 5 7 11 13 17 19 23 25 29 31 35 37 41 43 47 49 53 55 59 61 65 67 71 73 77 79 83 85 89 91 95 97
Take out numbers that have a composite factor of 3

11. Here’s How You Do It 2 3 5 7 11 13 17 19 23 25 29 31 35 37 41 43 47 49 53 55 59 61 65 67 71 73 77 79 83 85 89 91 95 97
Take out numbers that have a composite factor of 5

12. Take out numbers that have a composite factor of 5
HERE’S HOW YOU DO IT 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 49 53 59 61 67 71 73 77 79 83 89 91 97
Take out numbers that have a composite factor of 5

13. Here’s How You Do It 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 49 53 59 61 67 71 73 77 79 83 89 91 97
Take out numbers that have a composite factor of 7

14. Take out numbers that have a composite factor of 7
The PRIME Numbers! 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
Take out numbers that have a composite factor of 7

15. How do we know numbers are prime?

16. A prime number cannot be divided by anything other than 1 and itself.
That’s It!
A prime number cannot be divided by anything other than 1 and itself.
These are numbers that have only two factors – themselves and one.
An example of Prime Numbers would be…
1,3 (3 1) (3 1) (3 3)

17. How do we know numbers are composite?

18. That’s It! Numbers that have more than two factors . One is included
An example of composite numbers would be:
1,12 2,6 3,4
(1*12) (2*6) (3*4)

19. PRIME OR COMPOSITE?

20. 96

21. Composite Number
96 = 1,96 2,38 3, ,24 6,16 8,12,

22. 15

23. Composite Number
15= 1,3,5,15

24. 47

25. Prime Number
47= 1, 47

26. 93

27. Composite Number
93=
1,93 3,31

28. 54

29. Composite Number
54 =
1, , ,18 6,9

30. 57

31. Composite Number
57=
1, ,19

32. 19

33. Prime Number
19=
1,19