Prime and Composite Numbers

What is a composite number?

• It only has two factors

• It has more than two factors

• Has one factor

• Are always bigger than prime numbers

Tags

CCSS.4.OA.B.4

What is a prime number?

• It has exactly 2 factors

• It has more than 2 factors

• It has 1 factor

• It has 2 pairs of factors

Which is neither prime nor composite?

• 3

• 100

• 2

• 0 and 1

Which is not a factor of 12?

• 1

• 2

• 24

• 12

Which number is a prime number?

• 21

• 19

• 27

• 9

What is the only EVEN prime number?

• 4

• 12

• 2

• 0

What are the factors of 24?

• f24=(1,2,3,6,24)

• f24=(1,2,3,4,12,24)

• f24=(24,48,72)

• f24=(1,2,3,4,6,8,12,24)

Beside 21 and 1, which is one factor of 21?

• 2

• 7

• 11

• 4

Find the prime number. (Factorise each one)

• 81

• 21

• 51

• 41

Is 100 prime or composite?

• Prime

• Composite