Factors, Multiples, Primes and Composite Numbers

12*9=108 108 is a multiple

• True

• False

Which is true?

9*3=27

• 9 and 3 are factors

• i dont know

• 27 is not a multiple

• 27 is a multiple

What is the fifth multiple of 12?

• 65

• 8

• 60

• 72

What is a factor

• Two numbers

• Two numbers multiplied

• 1 random number

What are the factors of 21?

• 1,3,7 

• 1,21

• 0,1,21,7

• 1,3,7,21

7 is a prime number

• True

• False

Which is a prime number

• 11

• 2

• 6

• 13

How do you know if a number is composite?

• It has 2 or more multipes

• It can only be multiplied by 1 and itself

• It is always an odd number

Which one is a composite number?

• 19

• 1

• 28

• 3

Which of the following is not true about prime numbers? 

• No prime numbers end in zero

• 1 is a factor of every prime number

• They have two factors 

• All prime numbers are odd numbers.