Q:

What is the LCM of 72 and 149?

Accepted Solution

A:
Solution: The LCM of 72 and 149 is 10728 Methods How to find the LCM of 72 and 149 using Prime Factorization One way to find the LCM of 72 and 149 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 72? What are the Factors of 149? Here is the prime factorization of 72: 2 3 × 3 2 2^3 × 3^2 2 3 × 3 2 And this is the prime factorization of 149: 14 9 1 149^1 14 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: 2, 3, 149 2 3 × 3 2 × 14 9 1 = 10728 2^3 × 3^2 × 149^1 = 10728 2 3 × 3 2 × 14 9 1 = 10728 Through this we see that the LCM of 72 and 149 is 10728. How to Find the LCM of 72 and 149 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 72 and 149 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, 72 and 149: What are the Multiples of 72? What are the Multiples of 149? Let’s take a look at the first 10 multiples for each of these numbers, 72 and 149: First 10 Multiples of 72: 72, 144, 216, 288, 360, 432, 504, 576, 648, 720 First 10 Multiples of 149: 149, 298, 447, 596, 745, 894, 1043, 1192, 1341, 1490 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 72 and 149 are 10728, 21456, 32184. Because 10728 is the smallest, it is the least common multiple. The LCM of 72 and 149 is 10728. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 13 and 130? What is the LCM of 37 and 42? What is the LCM of 104 and 6? What is the LCM of 55 and 137? What is the LCM of 78 and 87?