Title: Prime Numbers
1Prime Numbers
- Some Simple Tips and Reminders
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2Definitions
- 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
3Definitions
- 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.
4What numbers are prime?
- Lets look at a number grid from 1 to 100 and see
how they were discovered.
5Heres How You Do It
Take out the number 1 because it is a special
number
6Heres How You Do It
Take out the number 1 because it is a special
number
7Heres How You Do It
Take out numbers that have a composite factor of 2
8Heres How You Do It
Take out numbers that have a composite factor of 2
9Heres How You Do It
Take out numbers that have a composite factor of 3
10Heres How You Do It
Take out numbers that have a composite factor of 3
11Heres How You Do It
Take out numbers that have a composite factor of 5
12Heres How You Do It
Take out numbers that have a composite factor of 5
13Heres How You Do It
Take out numbers that have a composite factor of 7
14The PRIME Numbers!
Take out numbers that have a composite factor of 7
15How Do We Know They Are Prime?
- Composite numbers can be placed into varying
types of rectangles - Prime numbers cannot
- Lets look at that
16Composite Numbers
6
17Prime Numbers
18Thats It!
- A prime number cannot be divided by anything
other than 1 and itself.