Prime and Composite

Is 81 prime or composite?

• Prime

• Composite 

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

Which one is a composite number?

• 37

• 41

• 21

• 29

The only even prime number

• 2

• 3

• 5

• 4

The number 11 is​ (a)   because it has ​ (b)  

• prime

• composite

• exactly 2 factors

• more than 2 factors

The number ​ (a)   is the only even prime number because it has ​ (b)  

• 2

• 4

• 1

• exactly two factors

• more than 2 factors

• exactly 1 factor

Which of the following numbers is a composite number?

• 2

• 3

• 5

• 9

The number 21 is ​ (a)   because it has ​ (b)  

• composite

• prime

• more than 1 factor pair

• exactly 1 factor pair

1 is neither prime nor composite

• True

• False

The number 17 is ​ (a)   because it has ​ (b)  

• prime

• composite

• exactly 1 factor pair

• more than 1 factor pair