prime and composite numbers

Numbers that can be multiplied together to make a product.

• multiples
• sum
• factors
• facts

Which choice lists all the factors for the number 24?

• 2, 3, 4, 6, 8, 12, 24
• 2, 3, 4, 6, 8, 12, 24, 36
• 1, 2, 3, 4, 6, 8, 12, 24
• 1, 2, 4, 5, 6, 8, 12 ,24

Which number below is NOT prime?

• 3
• 7
• 9
• 11

Which one is a composite number?

• 37
• 41
• 21
• 29

Which list is only composite numbers?

• 1, 3, 4
• 2, 4, 6
• 4, 6, 8
• 5, 6, 8

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

What is a composite number?

• a number with ONLY TWO factors

• a number with LESS THAN TWO factors

• a number with MORE THAN TWO factors

• a number with ONLY ONE factor

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

Which is equal to 2 x 2 x 5 x 5 ?

• 120

• 130

• 100

• 1,000

20 is a composite number. Why?

• Because it has more than two factors.

• Because its only factors are only 1 and itself.