Prime and Composite | Divisibility Rules

What makes a number composite?

• It only has two factors: 1 and itself.

• It is an even number.

• It is an odd number.

• It has more than two factors.

The ONLY factors prime numbers have are:

• 1 and itself

• 0 and itself

• 0 and 1

• 1

Which of the following lists ONLY prime numbers?

• 2, 3, 4, 5

• 1, 5, 7, 9

• 2, 3, 5, 7

• 2, 4, 6, 8

Which of the following lists ONLY composite numbers?

• 1, 3, 4

• 4, 6, 9

• 2, 4, 6

• 5, 6, 8

Which number is prime?

• 0

• 1

• 11

• 15

Which number is prime?

• 0

• 1

• 2

• 15

0 is a prime number.

• True
• False

1 is a prime number.

• True
• False

Using the divisibility rules, which of the following is considered composite?

• 81

• 41

• 31

• 71

Using the divisibility rules, which of the following is considered composite?

• 17

• 27

• 37

• 47