Factors and Multiples, Prime and Composite

Which statement below correctly defines a prime number?

• A prime number is always odd

• A prime number is a number that has more than two factors

• A prime number has exactly two factors- one and itself

• A prime number has at least three factors- one, itself, and another factor

Which number is a multiple of 3?

• 27

• 28

• 29

Find the missing multiple.

10: 10, 20, 30, 40, ___, 60, 70, 80

• 100

• 45

• 50

Which of the following shows the multiples of 12?

• 12, 22, 53, 60

• 4, 8, 12, 16, 24

• 12, 24, 36, 48, 60

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

• prime

• composite

• exactly 2 factors

• more than 2 factors

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

• composite

• prime

• more than 1 factor pair

• exactly 1 factor pair

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

• composite

• prime

• more than 2 factors

• exactly 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

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?

• prime

• 3

• prime

• 7

• composite

• 10

• composite

• 15

• composite

• 12