Q:

What is the LCM of 121 and 139?

Accepted Solution

A:
Solution: The LCM of 121 and 139 is 16819 Methods How to find the LCM of 121 and 139 using Prime Factorization One way to find the LCM of 121 and 139 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 121? What are the Factors of 139? Here is the prime factorization of 121: 1 1 2 11^2 1 1 2 And this is the prime factorization of 139: 13 9 1 139^1 13 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: 11, 139 1 1 2 × 13 9 1 = 16819 11^2 × 139^1 = 16819 1 1 2 × 13 9 1 = 16819 Through this we see that the LCM of 121 and 139 is 16819. How to Find the LCM of 121 and 139 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 121 and 139 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, 121 and 139: What are the Multiples of 121? What are the Multiples of 139? Let’s take a look at the first 10 multiples for each of these numbers, 121 and 139: First 10 Multiples of 121: 121, 242, 363, 484, 605, 726, 847, 968, 1089, 1210 First 10 Multiples of 139: 139, 278, 417, 556, 695, 834, 973, 1112, 1251, 1390 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 121 and 139 are 16819, 33638, 50457. Because 16819 is the smallest, it is the least common multiple. The LCM of 121 and 139 is 16819. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 2 and 96? What is the LCM of 66 and 110? What is the LCM of 86 and 150? What is the LCM of 6 and 12? What is the LCM of 115 and 62?