Prime and Composite STAAR Released Questions

13

• Prime

• Composite

15

• Prime

• Composite

17

• Prime

• Composite

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

Are each of these numbers prime or composite?

• composite

• 10

• composite

• 12

• prime

• 15

• prime

• 7

• composite

• 3

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

• prime

• composite

• exactly 2 factors

• more than 2 factors

True/False The number 1 is neither prime nor composite.

• True

• False

Which of the following numbers is composite?

• 1

• 2

• 3

• 4

I am a prime number between 30 and 40.  Which number could I be?

• 31

• 33

• 36

• 39

Which of the following numbers is a prime number?

• 1

• 11

• 21

• 51