Grade 9 -LCM & GCF

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1
• 2
• 7
• 14

Tags

CCSS.6.NS.B.4

Find the Greatest Common Factor (GCF) of 32 and 64.

• 1

• 2

• 4

• 32

Find the Greatest Common Factor (GCF) of 12, 18 & 30

• 1

• 3

• 6

• 12

What is the LCM of 16 and 24?

• 24

• 48

• 8

• 72

What is the greatest common factor (GCF) of 40a²b and 48ab²?

• 240a²b²

• 5ab

• 8ab

• 4ab

What is the least common multiple (LCM) of 48x²and 32x³?

• 8x²
• 16x²
• 16x
• 96x³

Find the LCM of the following numbers.
 $A=2^3\cdot5\cdot7$  
 $B=2\cdot3^2\cdot7^2$  

•  $2\cdot7$  

•  $2\cdot3\cdot5\cdot7$  

•  $2^3\cdot3^2\cdot5\cdot7^2$  

•  $2^2\cdot3^2\cdot5\cdot7$  

Find the GCF of the following numbers.
 $A=2\cdot3^2\cdot5$  
 $B=3^3\cdot5^3$  

•  $2\cdot3^3\cdot5^3$  

•  $3^2\cdot5$  

•  $2\cdot3\cdot5$  

•  $2\cdot3^2\cdot5$  

Avery gets newsletters by e-mail. He gets one for sports every 5 days, one for model railroads every 10 days, and one for music every 8 days. If he got all three today, how many more days will it be until he gets all three newsletters on the same day again? 

• 80 days
• 40 days
• 50 days
• 60 days

Tags

CCSS.6.NS.B.4

Jeremy has two pieces of wood:  one is 90 inches and the other is 72 inches. He wants to cut both pieces into smaller pieces of the same length.  What is the longest possible length he can cut and not have any lumber left over?

• 9
• 2
• 18
• 72

Tags

CCSS.6.NS.B.4