Prime Numbers

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Prime Numbers

Some Simple Tips and Reminders

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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

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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.

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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

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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 They Are Prime?