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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 by 2 Composite Number – An integer that can be divided by at least one other number (a factor) other than itself. Definitions.
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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 by 2 • Composite Number – An integer that can be divided by at least one other number (a factor) other than itself
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.
What numbers are prime? • Let’s look at a number grid from 1 to 100 and see how they were discovered.
Here’s How You Do It Take out the number 1 because it is a special number
Here’s How You Do It Take out the number 1 because it is a special number
Here’s How You Do It Take out numbers that have a composite factor of 2
Here’s How You Do It Take out numbers that have a composite factor of 2
Here’s How You Do It Take out numbers that have a composite factor of 3
Here’s How You Do It Take out numbers that have a composite factor of 3
Here’s How You Do It Take out numbers that have a composite factor of 5
Here’s How You Do It Take out numbers that have a composite factor of 5
Here’s How You Do It Take out numbers that have a composite factor of 7
The PRIME Numbers! Take out numbers that have a composite factor of 7
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…
15 24 Composite Numbers 6
17 29 7 Prime Numbers
That’s It! • A prime number cannot be divided by anything other than 1 and itself.
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