Solution: The LCM of 76 and 103 is 7828
Methods
How to find the LCM of 76 and 103 using Prime Factorization
One way to find the LCM of 76 and 103 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 76?
What are the Factors of 103?
Here is the prime factorization of 76:
2
2
×
1
9
1
2^2 × 19^1
2 2 × 1 9 1
And this is the prime factorization of 103:
10
3
1
103^1
10 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: 2, 19, 103
2
2
×
1
9
1
×
10
3
1
=
7828
2^2 × 19^1 × 103^1 = 7828
2 2 × 1 9 1 × 10 3 1 = 7828
Through this we see that the LCM of 76 and 103 is 7828.
How to Find the LCM of 76 and 103 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 76 and 103 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, 76 and 103:
What are the Multiples of 76?
What are the Multiples of 103?
Let’s take a look at the first 10 multiples for each of these numbers, 76 and 103:
First 10 Multiples of 76: 76, 152, 228, 304, 380, 456, 532, 608, 684, 760
First 10 Multiples of 103: 103, 206, 309, 412, 515, 618, 721, 824, 927, 1030
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 76 and 103 are 7828, 15656, 23484. Because 7828 is the smallest, it is the least common multiple.
The LCM of 76 and 103 is 7828.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 81 and 119?
What is the LCM of 3 and 79?
What is the LCM of 52 and 93?
What is the LCM of 47 and 54?
What is the LCM of 117 and 10?