Prime Composite Even Odd

If I multiply an odd and an odd number, what will my answer be? ( ODD x ODD = ? )

• Even

• Odd

• Either

• Not possible

Select all prime numbers:

• 51

• 2

• 1

• 21

• 23

Select all composite numbers:

• 51

• 2

• 1

• 21

• 23

A number with exactly two factors is...

• a prime number

• a composite number

• a special number

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

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

• composite

• prime

• more than 1 factor pair

• exactly 1 factor pair

Sort the numbers

*Hint: use your prime numbers chart!

• 24

• Neither Prime nor Composite

• 19

• Composite Number

• 0

• Prime Number

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

• prime

• composite

• exactly 1 factor pair

• more than 1 factor pair

Are each of these numbers prime or composite?

• composite

• 15

• composite

• 10

• prime

• 7

• prime

• 3

• composite

• 12

The number 25 is ​ (a)   because it has ​ (b)  

• composite

• prime

• more than 2 factors

• exactly 2 factors