Prime and Composite Numbers

Which number is prime?

• 5

• 9

• 15

• 4

Which number is prime?

• 10

• 15

• 2

• 16

Which number is composite?

• 2

• 17

• 11

• 7

A prime number

• does not have any factors

• can only be divided evenly by 1 and itself

• cannot be multiplied by anything

• has more than two factors

The only EVEN prime number is

• 12

• 10

• 2

• 4

Composite numbers

• are always even.

• can be odd or even.

• have to be bigger than 10.

• are always odd.

The numbers 2, 5, 7, and 11 are

• all composite.

• all even.

• all odd.

• all prime.

Which number is not composite?

• 2

• 25

• 9

• 12