Prime and Composite Numbers

A prime number has

• one factor.

• two factors.

• three or more factors.

Tags

CCSS.4.OA.B.4

Composite numbers have

• no factors.

• one factor.

• two factors.

• three or more factors.

Tags

CCSS.4.OA.B.4

Which of the following is a prime number?

• 3

• 6

• 9

• 12

Tags

CCSS.4.OA.B.4

Which of the following numbers is prime?

• 10

• 15

• 5

• 20

Tags

CCSS.4.OA.B.4

True or False?

1 is a prime number.

• True

• False

Which is a prime number?

• 15
• 17
• 21
• 39

What are all of the factors of 12?

• 1,2,3,4,6,12

• 1,2,3,4,6,8,12

• 1,2,4,6,12

• 12, 24, 48, 60...

What are factors?

• The top number in a fraction.
• The numbers multiplied together to make a product.
• The bottom number in a fraction.
• Angles smaller than 90 degrees.

Tags

CCSS.4.OA.B.4

Are there any numbers that are neither prime nor composite?

• Yes
• No

Tags

CCSS.4.OA.B.4

Which one is a prime number?

• 465
• 822
• 600
• 743

Tags

CCSS.4.OA.B.4