Q:

What is the LCM of 30 and 82?

Accepted Solution

A:
Solution: The LCM of 30 and 82 is 1230 Methods How to find the LCM of 30 and 82 using Prime Factorization One way to find the LCM of 30 and 82 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 30? What are the Factors of 82? Here is the prime factorization of 30: 2 1 × 3 1 × 5 1 2^1 × 3^1 × 5^1 2 1 × 3 1 × 5 1 And this is the prime factorization of 82: 2 1 × 4 1 1 2^1 × 41^1 2 1 × 4 1 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, 5, 41 2 1 × 3 1 × 5 1 × 4 1 1 = 1230 2^1 × 3^1 × 5^1 × 41^1 = 1230 2 1 × 3 1 × 5 1 × 4 1 1 = 1230 Through this we see that the LCM of 30 and 82 is 1230. How to Find the LCM of 30 and 82 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 30 and 82 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, 30 and 82: What are the Multiples of 30? What are the Multiples of 82? Let’s take a look at the first 10 multiples for each of these numbers, 30 and 82: First 10 Multiples of 30: 30, 60, 90, 120, 150, 180, 210, 240, 270, 300 First 10 Multiples of 82: 82, 164, 246, 328, 410, 492, 574, 656, 738, 820 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 30 and 82 are 1230, 2460, 3690. Because 1230 is the smallest, it is the least common multiple. The LCM of 30 and 82 is 1230. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 53 and 91? What is the LCM of 127 and 148? What is the LCM of 41 and 89? What is the LCM of 143 and 51? What is the LCM of 15 and 60?