Prime and Composite Number

How is a prime number different from a composite number?

• Prime numbers are smaller than composite numbers.

• Composite numbers are larger than prime numbers.

• All odd numbers are prime numbers.

• Prime numbers have only 2 factors, and composite numbers have more than 2 factors.

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CCSS.4.OA.B.4

Which one is a prime number?

• 465

• 822

• 600

• 743

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CCSS.4.OA.B.4

Which one is prime?

• 100

• 455

• 71

• 182

Tags

CCSS.4.OA.B.4

Which number below is NOT prime?

• 2

• 11

• 13

• 18

Tags

CCSS.4.OA.B.4

The number 21 is ​ (a)   because it has ​ (b)  

• composite

• prime

• more than 1 factor pair

• exactly 1 factor pair

Tags

CCSS.4.OA.B.4

The number 17 is ​ (a)   because it has ​ (b)  

• prime

• composite

• exactly 1 factor pair

• more than 1 factor pair

Tags

CCSS.4.OA.B.4

The number 25 is ​ (a)   because it has ​ (b)  

• composite

• prime

• more than 2 factors

• exactly 2 factors

Tags

CCSS.4.OA.B.4

Sort the numbers

*Hint: use your prime numbers chart!

• 19

• Composite Number

• 24

• Neither Prime nor Composite

• 0

• Prime Number

Tags

CCSS.4.OA.B.4

Match the following

• Only has 2 factors

  1 and itself

• Is not prime or composite

• 1

• Composite Numbers

• Have more than 2 factors

• Prime Numbers

• 2

• The smallest prime number

Tags

CCSS.4.OA.B.4

Are each of these numbers prime or composite?

• prime

• 7

• composite

• 12

• composite

• 15

• prime

• 3

• composite

• 10

Tags

CCSS.4.OA.B.4