Welcome to GreeneMath.com, your source for free math help!
Finding the LCM Test
About Finding the Least Common Multiple (LCM):

When we multiply a number by each nonzero whole number, we obtain a list known as the multiples of that number. When we do this for several numbers, we can compare those lists to look for a common multiple that has the lowest value. This is known as the least common multiple or LCM.

Test Objectives:

•Demonstrate the ability to generate the multiples of a number

•Demonstrate the ability to find the LCM using the listing method

•Demonstrate the ability to find the LCM using the prime factorization of each number

Finding the Least Common Multiple Test:




#1:


Instructions: Find the LCM by listing the multiples of each number.


a) LCM(4,10)


b) LCM(6,21)


Watch the Step by Step Video Solution  
|
   View the Written Solution



#2:


Instructions: Find the LCM.


a) LCM(15,18)


b) LCM(14,63)


Watch the Step by Step Video Solution  
|
   View the Written Solution



#3:


Instructions: Find the LCM.


a) LCM(24,81,156)


Watch the Step by Step Video Solution  
|
   View the Written Solution



#4:


Instructions: Find the LCM.


a) LCM(121,165,231)


Watch the Step by Step Video Solution  
|
   View the Written Solution



#5:


Instructions: Find the LCM.


a) LCM(550,150,225)


Watch the Step by Step Video Solution  
|
   View the Written Solution



Written Solutions:




#1:


Solution:


a) LCM(4,10) = 20


b) LCM(6,21) = 42


Watch the Step by Step Video Solution



#2:


Solution:


a) LCM(15,18) = 90


b) LCM(14,63) = 126


Watch the Step by Step Video Solution



#3:


Solution:


a) LCM(24,81,156) = 8424


Watch the Step by Step Video Solution



#4:


Solution:


a) LCM(121,165,231) = 12,705


Watch the Step by Step Video Solution



#5:


Solution:


a) LCM(550,150,225) = 4950


Watch the Step by Step Video Solution