Chapter 1 Math Review

Find the prime factorization of 21. 

• 3x7
• 2x2x2
• 2x3x3
• 7x7

Find the prime factorization of 12. 

• 2x2x3
• 2x2
• 3x4
• 6x2

Find the prime factorization of 16.

• 4x4
• 8x2
• 2x2x2x2
• 2x3

Find the prime factorization of 36. 

• 36 x 1
• 12 x 3
• 6 x 6
• 2 x 2 x 3 x 3

Find the prime factorization of 36. 

• 36 x 1
• 12 x 3
• 6 x 6
• 2 x 2 x 3 x 3

Find the prime factorization of 100. 

• 2 x 2 x 5 x 5
• 10 x 10 
• 50 x 2 
• 25 x 25

What is the greatest common factor of 8 and 12 

• 8
• 4
• 12
• 1

What is the greatest common factor of 9 and 15 

• 3
• 2
• 9
• 15

What is the greatest common factor of 12 and 18 

• 3
• 2
• 6 
• 12

What is the greatest common factor of 20 and 30 

• 2
• 5
• 10
• 20