Prime and Composite Number

What is a prime number?

• a number with ONLY two factors

• a number with LESS THAN two factors

• a number with ONLY one factor

• a number with MORE THAN two factors

_______________ have more than two factors.

• Factor tree

• Fractions

• Composite numbers

• Prime numbers

The only even prime number

• 2

• 3

• 5

• 4

True or False:

Every composite number can be expressed as a product of prime numbers.

• True

• False

20 is a composite number. Why?

• Because it has more than two factors.

• Because its only factors are only 1 and itself.

Which is a PRIME number?

• 15

• 17

• 21

• 39

What is a number that has more than 2 factors or multiplication equations called?

• prime

• composite

• factor

• multiple

The only factors that prime numbers have are:

• 0 and 1

• 0 and itself

• 1 and itself

• 1

Which of the following lists all of the prime numbers on the clock face?

• 1, 3, 5, 7, 11

• 3, 5, 7, 9, 11

• 2, 3, 7, 9

• 2, 3, 5, 7, 11

Which number is neither prime nor composite?

• 1

• 2

• 3

• 4