Prime, Composite, Prime Factorization, GCF, and Simplifying

All of the numbers below are prime except for:

• 83

• 31

• 15

• 2

• 37

Tags

CCSS.4.OA.B.4

Which of the following numbers are composite? You may have more than one answer.

• 55

• 1

• 20

• 33

• 23

Numbers that only have two factors, one and itself, are called __________ numbers.

Tags

CCSS.4.OA.B.4

What does the prime factorization for 24 look like in its final form?

• 3 x 4 x 2

• 4 x 6

• 3 x 2 x 2 x 2

• 2 x 6 x 2

What is the prime factorization for 36 in its final form?

• 2 x 2 x 9

• 6 x 2 x 3

• 2 x 18

• 2 x 2 x 3 x 3

What is the Greatest Common Factor of 12 and 15?

• 3

• 1

• 0

• 2

What is the Greatest Common Factor of 14 and 28?

• 2

• 14

• 28

• 4

Simplify

 $\frac{20}{35}$  

•  $\frac{10}{17}$  

•  $\frac{20}{35}$  

•  $\frac{1}{1.5}$  

•  $\frac{4}{7}$  

Simplify

 $\frac{6}{18}$  

•  $\frac{3}{9}$  

•  $\frac{6}{18}$  

•  $\frac{2}{9}$  

•  $\frac{1}{3}$  

 $\frac{8}{9}$  

•  $\frac{4}{4.5}$  

•  $\frac{2}{3}$  

•  $\frac{8}{9}$