Exploring the World of Prime Numbers

The video tutorial by Mr. J explains what prime numbers are, defining them as whole numbers with only two factors: one and the number itself. It provides examples of prime numbers such as 3, 7, and 19, and explains how to identify prime and composite numbers. The video also highlights that 2 is the only even prime number, while all other even numbers are composite. The tutorial concludes with a summary of the key points discussed.

What is a prime number?

• A number that is even

• A number with only one factor

• A number with only two factors

• A number with more than two factors

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CCSS.4.OA.B.4

Which of the following is a prime number?

• 3

• 4

• 9

• 6

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CCSS.4.OA.B.4

Why is 2 considered a unique prime number?

• It is the only odd prime number

• It is the only even prime number

• It is the smallest prime number

• It is the largest prime number

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CCSS.4.OA.B.4

Which of the following numbers is composite?

• 2

• 19

• 3

• 21

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CCSS.4.OA.B.4

What are the factors of 13?

• 1, 2, 3, and 13

• 1, 3, and 13

• 1, 2, and 13

• 1 and 13

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CCSS.4.OA.B.4

Why is 8 not a prime number?

• It is a multiple of 3

• It is less than 10

• It has more than two factors

• It is an odd number

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CCSS.4.OA.B.4

Which of the following is a composite number?

• 7

• 19

• 8

• 13

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CCSS.4.OA.B.4

How can we determine that 5462 is not a prime number without listing all its factors?

• It is an odd number

• It is a multiple of 3

• It is a multiple of 5

• It is an even number

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CCSS.4.OA.B.4

What is the definition of a composite number?

• A number with more than two factors

• A number with only two factors

• A number that is odd

• A number with only one factor

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CCSS.4.OA.B.4

Which of the following statements is true?

• All even numbers are prime

• All odd numbers are composite

• All even numbers except 2 are composite

• All numbers greater than 10 are composite

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CCSS.4.OA.B.4