Prime and Composite Numbers

Is 8 prime or composite?

• Prime

• Composite

Which of the following numbers are a prime number?

• 23

• 27

• 25

• 21

Which of the following is NOT a prime number?

• 31

• 41

• 51

• 12

What factor does every number have in common?

Kevin is making a banner with an area of 7 square feet. The width and the length are whole numbers. What are the possible dimensions?

Which of the following is a composite number?

• 1

• 7

• 5

• 21

Which one is NOT a composite number?

• 21

• 44

• 54

• 5