Solution: The LCM of 147 and 55 is 8085
Methods
How to find the LCM of 147 and 55 using Prime Factorization
One way to find the LCM of 147 and 55 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 147?
What are the Factors of 55?
Here is the prime factorization of 147:
3
1
×
7
2
3^1 × 7^2
3 1 × 7 2
And this is the prime factorization of 55:
5
1
×
1
1
1
5^1 × 11^1
5 1 × 1 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, 7, 5, 11
3
1
×
5
1
×
7
2
×
1
1
1
=
8085
3^1 × 5^1 × 7^2 × 11^1 = 8085
3 1 × 5 1 × 7 2 × 1 1 1 = 8085
Through this we see that the LCM of 147 and 55 is 8085.
How to Find the LCM of 147 and 55 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 147 and 55 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, 147 and 55:
What are the Multiples of 147?
What are the Multiples of 55?
Let’s take a look at the first 10 multiples for each of these numbers, 147 and 55:
First 10 Multiples of 147: 147, 294, 441, 588, 735, 882, 1029, 1176, 1323, 1470
First 10 Multiples of 55: 55, 110, 165, 220, 275, 330, 385, 440, 495, 550
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 147 and 55 are 8085, 16170, 24255. Because 8085 is the smallest, it is the least common multiple.
The LCM of 147 and 55 is 8085.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 113 and 145?
What is the LCM of 32 and 77?
What is the LCM of 129 and 136?
What is the LCM of 90 and 87?
What is the LCM of 94 and 116?