Prime and Composite Numbers

Is 3 a factor of 12?

• yes
• no

Tags

CCSS.3.OA.A.4

CCSS.3.OA.B.6

Besides 15 and 1, what is one factor of 15?

• 2
• 4
• 6
• 3

Tags

CCSS.3.OA.B.6

What do we call the answer to a multiplication question?

• sum
• difference
• quotient
• product

Tags

CCSS.3.OA.A.1

CCSS.3.OA.C.7

Which of the following is NOT true about prime numbers? 

• They have exactly two factors 
• 1 is a factor of every prime number
• No prime numbers end in zero
• All prime numbers are odd numbers.  

Which number is NOT a factor of 18 ?

• 2
• 3
• 5
• 9

Is 33 a prime or composite number?

• Prime
• Composite

Use a factor tree to find prime factorization of 24.

• 2 x 3 x 2 x 3

• 2 x 3 x 2 x 2

• 6 x 2 x 2

• 2 x 3 x 4

Tags

CCSS.4.OA.B.4

Which of the following is NOT prime?

• 11

• 13

• 19

• 21

Use a factor tree to find the prime factorization of 60.

• 2 x 3 x 3 x 2

• 2 x 2 x 2 x 3

• 2 x 5 x 2 x 2

• 2 x 3 x 2 x 5

Use a factor tree to find the prime factorization of 45

• 2 x 3 x 5

• 3 x 5 x 4

• 3 x 2 x 8

• 9 x 5