Prime and Composite Numbers

Which list has only prime numbers?

• 2, 3, 4, 5

• 1, 5, 7, 9

• 2, 3, 5, 7

Find the prime number.

• 10

• 9

• 7

Composite numbers:

• Are always bigger than prime numbers

• Have more than 2 factors

Which number is NOT a factor of 10?

• 1

• 2

• 3

Which is a prime number?

• 15

• 17

• 21

Is 100 a prime or composite number?

• Prime
• Composite

Tags

CCSS.4.OA.B.4

Four students each made a list of prime numbers.
Eric:   5, 7 17, 23
Maya:  3, 5, 13, 17
Bella:  2, 3, 17, 19
Joan:  7, 11, 13, 21
Who made an error and included a composite number?

• Eric
• Maya
• Bella
• Joan

Tags

CCSS.4.OA.B.4

Is the number 123 prime or composite?

• Prime 
• Composite

Tags

CCSS.4.OA.B.4

7 is a ________ number.

• prime
• composite

Tags

CCSS.4.OA.B.4

A number that has more than 2 factors is called a __________ number.

• prime

• composite