Q:

What is the LCM of 31 and 149?

Accepted Solution

A:
Solution: The LCM of 31 and 149 is 4619 Methods How to find the LCM of 31 and 149 using Prime Factorization One way to find the LCM of 31 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 31? What are the Factors of 149? Here is the prime factorization of 31: 3 1 1 31^1 3 1 1 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: 31, 149 3 1 1 × 14 9 1 = 4619 31^1 × 149^1 = 4619 3 1 1 × 14 9 1 = 4619 Through this we see that the LCM of 31 and 149 is 4619. How to Find the LCM of 31 and 149 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 31 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, 31 and 149: What are the Multiples of 31? What are the Multiples of 149? Let’s take a look at the first 10 multiples for each of these numbers, 31 and 149: First 10 Multiples of 31: 31, 62, 93, 124, 155, 186, 217, 248, 279, 310 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 31 and 149 are 4619, 9238, 13857. Because 4619 is the smallest, it is the least common multiple. The LCM of 31 and 149 is 4619. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 24 and 88? What is the LCM of 9 and 25? What is the LCM of 104 and 150? What is the LCM of 7 and 39? What is the LCM of 83 and 62?