Q:

What is the LCM of 132 and 80?

Accepted Solution

A:
Solution: The LCM of 132 and 80 is 2640 Methods How to find the LCM of 132 and 80 using Prime Factorization One way to find the LCM of 132 and 80 is to start by comparing the prime factorization of each number. To find the prime factorization, you can follow the instructions for each number here: What are the Factors of 132? What are the Factors of 80? Here is the prime factorization of 132: 2 2 × 3 1 × 1 1 1 2^2 × 3^1 × 11^1 2 2 × 3 1 × 1 1 1 And this is the prime factorization of 80: 2 4 × 5 1 2^4 × 5^1 2 4 × 5 1 When you compare the prime factorization of these two numbers, you want to look for the highest power that each prime factor is raised to. In this case, there are these prime factors to consider: 2, 3, 11, 5 2 4 × 3 1 × 5 1 × 1 1 1 = 2640 2^4 × 3^1 × 5^1 × 11^1 = 2640 2 4 × 3 1 × 5 1 × 1 1 1 = 2640 Through this we see that the LCM of 132 and 80 is 2640. How to Find the LCM of 132 and 80 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 132 and 80 is to begin to list a few multiples for each number. If you need a refresher on how to find the multiples of these numbers, you can see the walkthroughs in the links below for each number. Let’s take a look at the multiples for each of these numbers, 132 and 80: What are the Multiples of 132? What are the Multiples of 80? Let’s take a look at the first 10 multiples for each of these numbers, 132 and 80: First 10 Multiples of 132: 132, 264, 396, 528, 660, 792, 924, 1056, 1188, 1320 First 10 Multiples of 80: 80, 160, 240, 320, 400, 480, 560, 640, 720, 800 You can continue to list out the multiples of these numbers as long as needed to find a match. Once you do find a match, or several matches, the smallest of these matches would be the Least Common Multiple. For instance, the first matching multiple(s) of 132 and 80 are 2640, 5280, 7920. Because 2640 is the smallest, it is the least common multiple. The LCM of 132 and 80 is 2640. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 107 and 23? What is the LCM of 73 and 57? What is the LCM of 10 and 17? What is the LCM of 72 and 106? What is the LCM of 77 and 112?