Solution: The LCM of 51 and 97 is 4947
Methods
How to find the LCM of 51 and 97 using Prime Factorization
One way to find the LCM of 51 and 97 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 51?
What are the Factors of 97?
Here is the prime factorization of 51:
3
1
×
1
7
1
3^1 × 17^1
3 1 × 1 7 1
And this is the prime factorization of 97:
9
7
1
97^1
9 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: 3, 17, 97
3
1
×
1
7
1
×
9
7
1
=
4947
3^1 × 17^1 × 97^1 = 4947
3 1 × 1 7 1 × 9 7 1 = 4947
Through this we see that the LCM of 51 and 97 is 4947.
How to Find the LCM of 51 and 97 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 51 and 97 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, 51 and 97:
What are the Multiples of 51?
What are the Multiples of 97?
Let’s take a look at the first 10 multiples for each of these numbers, 51 and 97:
First 10 Multiples of 51: 51, 102, 153, 204, 255, 306, 357, 408, 459, 510
First 10 Multiples of 97: 97, 194, 291, 388, 485, 582, 679, 776, 873, 970
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 51 and 97 are 4947, 9894, 14841. Because 4947 is the smallest, it is the least common multiple.
The LCM of 51 and 97 is 4947.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 108 and 125?
What is the LCM of 80 and 59?
What is the LCM of 115 and 148?
What is the LCM of 6 and 71?
What is the LCM of 114 and 127?