Q:

What is the LCM of 33 and 71?

Accepted Solution

A:
Solution: The LCM of 33 and 71 is 2343 Methods How to find the LCM of 33 and 71 using Prime Factorization One way to find the LCM of 33 and 71 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 33? What are the Factors of 71? Here is the prime factorization of 33: 3 1 × 1 1 1 3^1 × 11^1 3 1 × 1 1 1 And this is the prime factorization of 71: 7 1 1 71^1 7 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: 3, 11, 71 3 1 × 1 1 1 × 7 1 1 = 2343 3^1 × 11^1 × 71^1 = 2343 3 1 × 1 1 1 × 7 1 1 = 2343 Through this we see that the LCM of 33 and 71 is 2343. How to Find the LCM of 33 and 71 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 33 and 71 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, 33 and 71: What are the Multiples of 33? What are the Multiples of 71? Let’s take a look at the first 10 multiples for each of these numbers, 33 and 71: First 10 Multiples of 33: 33, 66, 99, 132, 165, 198, 231, 264, 297, 330 First 10 Multiples of 71: 71, 142, 213, 284, 355, 426, 497, 568, 639, 710 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 33 and 71 are 2343, 4686, 7029. Because 2343 is the smallest, it is the least common multiple. The LCM of 33 and 71 is 2343. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 11 and 43? What is the LCM of 73 and 25? What is the LCM of 128 and 57? What is the LCM of 19 and 85? What is the LCM of 17 and 48?