Solution: The LCM of 18 and 148 is 1332
Methods
How to find the LCM of 18 and 148 using Prime Factorization
One way to find the LCM of 18 and 148 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 18?
What are the Factors of 148?
Here is the prime factorization of 18:
2
1
×
3
2
2^1 × 3^2
2 1 × 3 2
And this is the prime factorization of 148:
2
2
×
3
7
1
2^2 × 37^1
2 2 × 3 7 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, 37
2
2
×
3
2
×
3
7
1
=
1332
2^2 × 3^2 × 37^1 = 1332
2 2 × 3 2 × 3 7 1 = 1332
Through this we see that the LCM of 18 and 148 is 1332.
How to Find the LCM of 18 and 148 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 18 and 148 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, 18 and 148:
What are the Multiples of 18?
What are the Multiples of 148?
Let’s take a look at the first 10 multiples for each of these numbers, 18 and 148:
First 10 Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, 162, 180
First 10 Multiples of 148: 148, 296, 444, 592, 740, 888, 1036, 1184, 1332, 1480
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 18 and 148 are 1332, 2664, 3996. Because 1332 is the smallest, it is the least common multiple.
The LCM of 18 and 148 is 1332.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 130 and 16?
What is the LCM of 86 and 123?
What is the LCM of 74 and 3?
What is the LCM of 111 and 105?
What is the LCM of 148 and 132?