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

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ODD OR EVEN? ODD OR EVEN? 1. Write O for odd and E for even 2. Find the half of the number. 3____ 39____ 14___ 81____ 25___ 42 ____ 36 ___ 57_____ 54 ___ 72 ____ 71 ___ 63____

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

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HERE’S HOW YOU DO IT Take out the number 1 because it is a special number

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HERE’S HOW YOU DO IT Take out the number 1 because it is a special number

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HERE’S HOW YOU DO IT Take out numbers that have a composite factor of 2

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HERE’S HOW YOU DO IT Take out numbers that have a composite factor of 2 Extra help: Even numbers different from 2.

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HERE’S HOW YOU DO IT Take out numbers that have a composite factor of 3

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HERE’S HOW YOU DO IT Take out numbers that have a composite factor of 3

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Here’s How You Do It Take out numbers that have a composite factor of 5

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HERE’S HOW YOU DO IT Take out numbers that have a composite factor of 5

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Here’s How You Do It Take out numbers that have a composite factor of 7

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The PRIME Numbers! Take out numbers that have a composite factor of 7

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How do we know numbers are prime?

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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)

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How do we know numbers are composite?

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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)

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PRIME OR COMPOSITE ?

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96

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Composite Number 96 = 1,96 2,38 3,32 4,24 6,16 8,12,

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15

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Composite Number 15= 1,3,5,15

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47

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Prime Number 47= 1, 47

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93

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Composite Number 93= 1,93 3,31

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54

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Composite Number 54 = 1,54 2,27 3,18 6,9

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57

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Composite Number 57= 1,57 3,19

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19

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Prime Number 19= 1,19

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