Factors and Prime Numbers

The video tutorial explains the difference between prime and composite numbers. It begins by defining a prime number as a whole number greater than one with only two factors: one and itself. Examples of prime numbers such as two, three, and thirteen are provided. The tutorial then explores composite numbers, using twelve, thirty-five, and seventy-two as examples, showing that these numbers have more than two factors. The video also confirms that seventeen and forty-one are prime numbers, as they have only two factors each.

What is a prime number?

• A number with only one factor

• A number with exactly two factors

• A number with more than two factors

• A number that is even

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CCSS.4.OA.B.4

Which of the following is a prime number?

• Four

• Six

• Seven

• Nine

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CCSS.4.OA.B.4

Why is the number twelve considered composite?

• It is an odd number

• It has more than two factors

• It has exactly two factors

• It has only one factor

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CCSS.4.OA.B.4

Which of the following is a factor of twelve?

• Five

• Seven

• Three

• Eleven

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CCSS.4.OA.B.4

What makes thirty-five a composite number?

• It has more than two factors

• It is an even number

• It is a prime number

• It has only two factors

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CCSS.4.OA.B.4

Which pair of numbers are factors of thirty-five?

• Two and three

• Five and seven

• Nine and ten

• Six and eight

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CCSS.4.OA.B.4

Why is seventeen considered a prime number?

• It has more than two factors

• It has only one factor

• It is an even number

• It has exactly two factors

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CCSS.4.OA.B.4

Which of the following numbers is also prime like forty-one?

• Thirty-six

• Forty-three

• Forty-two

• Forty-four

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CCSS.4.OA.B.4

What indicates that seventy-two is a composite number?

• It has only two factors

• It is an odd number

• It has more than two factors

• It is a prime number

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CCSS.4.OA.B.4

Which of the following is a factor of seventy-two?

• Five

• Thirteen

• Eight

• Eleven

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CCSS.4.OA.B.4