Q:

What is the LCM of 104 and 90?

Accepted Solution

A:
Solution: The LCM of 104 and 90 is 4680 Methods How to find the LCM of 104 and 90 using Prime Factorization One way to find the LCM of 104 and 90 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 104? What are the Factors of 90? Here is the prime factorization of 104: 2 3 × 1 3 1 2^3 × 13^1 2 3 × 1 3 1 And this is the prime factorization of 90: 2 1 × 3 2 × 5 1 2^1 × 3^2 × 5^1 2 1 × 3 2 × 5 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, 13, 3, 5 2 3 × 3 2 × 5 1 × 1 3 1 = 4680 2^3 × 3^2 × 5^1 × 13^1 = 4680 2 3 × 3 2 × 5 1 × 1 3 1 = 4680 Through this we see that the LCM of 104 and 90 is 4680. How to Find the LCM of 104 and 90 by Listing Common Multiples The first step to this method of finding the Least Common Multiple of 104 and 90 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, 104 and 90: What are the Multiples of 104? What are the Multiples of 90? Let’s take a look at the first 10 multiples for each of these numbers, 104 and 90: First 10 Multiples of 104: 104, 208, 312, 416, 520, 624, 728, 832, 936, 1040 First 10 Multiples of 90: 90, 180, 270, 360, 450, 540, 630, 720, 810, 900 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 104 and 90 are 4680, 9360, 14040. Because 4680 is the smallest, it is the least common multiple. The LCM of 104 and 90 is 4680. Find the LCM of Other Number Pairs Want more practice? Try some of these other LCM problems: What is the LCM of 93 and 8? What is the LCM of 65 and 70? What is the LCM of 141 and 107? What is the LCM of 112 and 46? What is the LCM of 42 and 116?