Solution: The LCM of 129 and 62 is 7998
Methods
How to find the LCM of 129 and 62 using Prime Factorization
One way to find the LCM of 129 and 62 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 129?
What are the Factors of 62?
Here is the prime factorization of 129:
3
1
×
4
3
1
3^1 × 43^1
3 1 × 4 3 1
And this is the prime factorization of 62:
2
1
×
3
1
1
2^1 × 31^1
2 1 × 3 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, 43, 2, 31
2
1
×
3
1
×
3
1
1
×
4
3
1
=
7998
2^1 × 3^1 × 31^1 × 43^1 = 7998
2 1 × 3 1 × 3 1 1 × 4 3 1 = 7998
Through this we see that the LCM of 129 and 62 is 7998.
How to Find the LCM of 129 and 62 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 129 and 62 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, 129 and 62:
What are the Multiples of 129?
What are the Multiples of 62?
Let’s take a look at the first 10 multiples for each of these numbers, 129 and 62:
First 10 Multiples of 129: 129, 258, 387, 516, 645, 774, 903, 1032, 1161, 1290
First 10 Multiples of 62: 62, 124, 186, 248, 310, 372, 434, 496, 558, 620
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 129 and 62 are 7998, 15996, 23994. Because 7998 is the smallest, it is the least common multiple.
The LCM of 129 and 62 is 7998.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 111 and 150?
What is the LCM of 29 and 71?
What is the LCM of 103 and 23?
What is the LCM of 42 and 64?
What is the LCM of 100 and 41?