Solution: The LCM of 75 and 24 is 600
Methods
How to find the LCM of 75 and 24 using Prime Factorization
One way to find the LCM of 75 and 24 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 75?
What are the Factors of 24?
Here is the prime factorization of 75:
3
1
×
5
2
3^1 × 5^2
3 1 × 5 2
And this is the prime factorization of 24:
2
3
×
3
1
2^3 × 3^1
2 3 × 3 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, 5, 2
2
3
×
3
1
×
5
2
=
600
2^3 × 3^1 × 5^2 = 600
2 3 × 3 1 × 5 2 = 600
Through this we see that the LCM of 75 and 24 is 600.
How to Find the LCM of 75 and 24 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 75 and 24 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, 75 and 24:
What are the Multiples of 75?
What are the Multiples of 24?
Let’s take a look at the first 10 multiples for each of these numbers, 75 and 24:
First 10 Multiples of 75: 75, 150, 225, 300, 375, 450, 525, 600, 675, 750
First 10 Multiples of 24: 24, 48, 72, 96, 120, 144, 168, 192, 216, 240
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 75 and 24 are 600, 1200, 1800. Because 600 is the smallest, it is the least common multiple.
The LCM of 75 and 24 is 600.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 1 and 52?
What is the LCM of 141 and 94?
What is the LCM of 92 and 61?
What is the LCM of 27 and 109?
What is the LCM of 35 and 6?