Exploring Prime and Composite Numbers

The video tutorial explains the difference between prime and composite numbers. Prime numbers are defined as whole numbers with only two factors: one and itself. Examples include 3, 5, 7, 19, and 13. Composite numbers have more than two factors, such as 4, 21, and 12. The video provides examples and exercises to help identify prime and composite numbers, emphasizing that a number cannot be both.

What is a prime number?

• A number with only one factor

• A number with only two factors

• A number with more than two factors

• A number with no factors

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CCSS.4.OA.B.4

Which of the following is a prime number?

• 4

• 8

• 6

• 5

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CCSS.4.OA.B.4

What makes a number composite?

• Having no factors

• Having only one factor

• Having only two factors

• Having more than two factors

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CCSS.4.OA.B.4

Which of the following is a composite number?

• 7

• 13

• 19

• 4

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CCSS.4.OA.B.4

How many factors does a prime number have?

• More than three

• Two

• One

• Three

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CCSS.4.OA.B.4

How many factors does a composite number have?

• None

• More than two

• Two

• One

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CCSS.4.OA.B.4

What are the factors of 24?

• 1, 24

• 1, 2, 4, 8, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 3, 8, 24

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CCSS.4.OA.B.4

Is 24 a prime or composite number?

• Prime

• Composite

• Both

• Neither

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CCSS.4.OA.B.4

Which of the following numbers is composite?

• 21

• 7

• 19

• 13

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CCSS.4.OA.B.4

What is the main difference between prime and composite numbers?

• Prime numbers have only two factors, composite numbers have more than two

• Prime numbers have more than two factors, composite numbers have only two

• Prime numbers have only one factor, composite numbers have more than one

• Prime numbers have no factors, composite numbers have factors

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CCSS.4.OA.B.4