Prime vs Composite Numbers

What are the factors of 8?

• 1, 2, 4, 8
• 1, 8
• 1, 3, 8
• 1, 2, 8

Tags

CCSS.4.OA.B.4

What are the factors of 16?

• 1, 2, 4, 8, 16
• 1, 8, 16
• 1, 2, 4, 16
• 1, 4, 8, 16

Which is NOT a factor of 24?

• 1

• 2

• 4

• 5

Tags

CCSS.4.OA.B.4

Which is NOT a factor of 21?

• 7

• 21

• 1

• 4

Tags

CCSS.4.OA.B.4

What is the definition of a Prime number?

• A number with only one factor.

• A number that only has one factor pair, 1 and itself.

• A number that is bigger than 1.

• A number that has more than two factors.

What is the definition of a composite number?

• a number that has more than one factor pair.

• A number that can only be made by multiplying itself by 1.

• a number that has only one factor pair.

• any number bigger than 1.

Find the prime number.

• 0
• 1
• 7
• 4

Which numbers are prime?

• 1

• 2

• 11

• 15

• 21

Tags

CCSS.4.OA.B.4

Which numbers are composite?

• 6

• 45

• 33

• 47

• 29

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

Tags

CCSS.4.OA.B.4