Prime and Composite Numbers

Which of these numbers is prime?

• 15

• 45

• 63

• 73

Which of these numbers is a prime number?

• 25

• 33

• 63

• 71

Which of these numbers is prime?

• 29

• 33

• 51

• 65

Which number is a prime number?

• 3

• 30

• 63

• 77

Which number is prime?

• 9

• 17

• 25

• 45

Which number is prime?

• 11

• 15

• 21

• 57

Which number is a composite number?

• 41

• 77

• 83

• 89

Which of these numbers is a composite number?

• 4

• 7

• 23

• 41

Which of these is a composite number?

• 7

• 37

• 43

• 68

Which number is a composite number?

• 5

• 19

• 71

• 85