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Prime Numbers Some Simple Tips and Reminders. Definitions Even Numbers – Any number that can be divided by 2 Odd Numbers – Any number that cannot be divided.

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Presentation on theme: "Prime Numbers Some Simple Tips and Reminders. Definitions Even Numbers – Any number that can be divided by 2 Odd Numbers – Any number that cannot be divided."— Presentation transcript:

1 Prime Numbers Some Simple Tips and Reminders

2 Definitions Even Numbers – Any number that can be divided by 2 Odd Numbers – Any number that cannot be divided by 2 Composite Number – An integer that can be divided by at least one other number (a factor) other than itself

3 Definitions Prime Number – An integer whose only factors are 1 and itself. Factor – a number that can divide another number without a remainder. Prime Factors – an expression of numbers that divides another integer without a remainder where all the factors are prime.

4 What numbers are prime? Let’s look at a number grid from 1 to 100 and see how they were discovered.

5 Here’s How You Do It Take out the number 1 because it is a special number

6 Here’s How You Do It Take out the number 1 because it is a special number

7 Here’s How You Do It Take out numbers that have a composite factor of 2

8 Here’s How You Do It Take out numbers that have a composite factor of 2

9 Here’s How You Do It Take out numbers that have a composite factor of 3

10 Here’s How You Do It Take out numbers that have a composite factor of 3

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

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

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

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

15 How Do We Know They Are Prime? Composite numbers can be placed into varying types of rectangles Prime numbers cannot Let’s look at that…

16 Composite Numbers

17 Prime Numbers

18 That’s It! A prime number cannot be divided by anything other than 1 and itself.

19 This powerpoint was kindly donated to is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.


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