Prime and Composite Numbers

What is a prime number?

• A number with many factors.

• A number that can only be divided by 1 and itself.

• A number that is always even.

• A number that is always odd.

What is a composite number?

• A number with only two factors.

• A number that can only be divided by 1 and itself.

• A number with more than two factors.

• A number that is always odd.

Which of these numbers is a composite number?

• 11

• 17

• 23

• 25

Which of these numbers is a composite number?

• 19

• 31

• 37

• 39

Is the number 6 a prime or composite number?

• Prime, because its only factors are 1 and 6.

• Composite, because it has factors other than 1 and 6.

• Prime, because it is an even number.

• Composite, because it is an odd number.

Is the number 24 a prime or composite number?

• Prime, because it is an even number.

• Composite, because it has factors like 2, 3, 4, 6, 8, and 12.

• Prime, because its only factors are 1 and 24.

• Composite, because it is an odd number.

Is the number 7 a prime or composite number?

• Composite, because it is an odd number.

• Prime, because its only factors are 1 and 7.

• Composite, because it has factors like 2 and 3.

• Prime, because it is a small number.

Which of these numbers is a prime number?

• 18

• 9

• 4

• 13

Which of these numbers is a prime number?

• 15

• 5

• 18

• 33

What is special about the number 2 when talking about prime and composite numbers?

• It is the only odd prime number.

• It is the only even prime number.

• It is a composite number.

• It has no factors.