Q:

What is the LCM of 125 and 57?

Accepted Solution

A:
Solution: The LCM of 125 and 57 is 7125 Methods How to find the LCM of 125 and 57 using Prime Factorization One way to find the LCM of 125 and 57 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 125? What are the Factors of 57? Here is the prime factorization of 125: 5 3 5^3 5 3 And this is the prime factorization of 57: 3 1 × 1 9 1 3^1 × 19^1 3 1 × 1 9 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: 5, 3, 19 3 1 × 5 3 × 1 9 1 = 7125 3^1 × 5^3 × 19^1 = 7125 3 1 × 5 3 × 1 9 1 = 7125 Through this we see that the LCM of 125 and 57 is 7125. How to Find the LCM of 125 and 57 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 125 and 57 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, 125 and 57: What are the Multiples of 125? What are the Multiples of 57? Let’s take a look at the first 10 multiples for each of these numbers, 125 and 57: First 10 Multiples of 125: 125, 250, 375, 500, 625, 750, 875, 1000, 1125, 1250 First 10 Multiples of 57: 57, 114, 171, 228, 285, 342, 399, 456, 513, 570 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 125 and 57 are 7125, 14250, 21375. Because 7125 is the smallest, it is the least common multiple. The LCM of 125 and 57 is 7125. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 53 and 84? What is the LCM of 113 and 89? What is the LCM of 35 and 120? What is the LCM of 3 and 33? What is the LCM of 5 and 130?