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Prime Numbers

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Prime Number An integer whose only factors are 1 and itself. ... Prime Factors an expression of numbers that divides another integer without a ... – PowerPoint PPT presentation

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Title: Prime Numbers


1
Prime Numbers
  • Some Simple Tips and Reminders

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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?
  • Lets look at a number grid from 1 to 100 and see
    how they were discovered.

5
Heres How You Do It
Take out the number 1 because it is a special
number
6
Heres How You Do It
Take out the number 1 because it is a special
number
7
Heres How You Do It
Take out numbers that have a composite factor of 2
8
Heres How You Do It
Take out numbers that have a composite factor of 2
9
Heres How You Do It
Take out numbers that have a composite factor of 3
10
Heres How You Do It
Take out numbers that have a composite factor of 3
11
Heres How You Do It
Take out numbers that have a composite factor of 5
12
Heres How You Do It
Take out numbers that have a composite factor of 5
13
Heres 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
  • Lets look at that

16
Composite Numbers
6
17
Prime Numbers
18
Thats It!
  • A prime number cannot be divided by anything
    other than 1 and itself.
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