Prime Composite Problems

Brenda said that the number 2 is prime becuase it has only two factors. Carla said that the number 2 is composite because it is even, and all even numbers are composite. Who is correct?

• Brenda is correct

• Carla is correct

• Both of them are correct

• Neither of them is correct

Four students each wrote down a number between 30 and 40. The list shows the numbers they wrote. Which student wrote down a prime number?

• Elly

• Ulyssess

• Maggie

• Plamer

Look at the factor pairs for the compostie number 56.

1, 56

2, 28

4, 14

7, 8

Which is a prime factor of the compostie number 56?

• 1

• 4

• 7

• 8

What are the prime factors of 24?

• 3,8

• 1,24

• 3,4,4

• 2,2,2,3

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

• composite

• prime

• more than 2 factors

• exactly 2 factors

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

• prime

• composite

• exactly 2 factors

• more than 2 factors

Sort the numbers

*Hint: use your prime numbers chart!

• 19

• Neither Prime nor Composite

• 24

• Prime Number

• 0

• Composite Number

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

• prime

• composite

• exactly 1 factor pair

• more than 1 factor pair

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

• True

• False

Are each of these numbers prime or composite?

• composite

• 15

• prime

• 3

• composite

• 10

• prime

• 7

• composite

• 12