Solution: The LCM of 95 and 105 is 1995
Methods
How to find the LCM of 95 and 105 using Prime Factorization
One way to find the LCM of 95 and 105 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 95?
What are the Factors of 105?
Here is the prime factorization of 95:
5
1
×
1
9
1
5^1 × 19^1
5 1 × 1 9 1
And this is the prime factorization of 105:
3
1
×
5
1
×
7
1
3^1 × 5^1 × 7^1
3 1 × 5 1 × 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: 5, 19, 3, 7
3
1
×
5
1
×
7
1
×
1
9
1
=
1995
3^1 × 5^1 × 7^1 × 19^1 = 1995
3 1 × 5 1 × 7 1 × 1 9 1 = 1995
Through this we see that the LCM of 95 and 105 is 1995.
How to Find the LCM of 95 and 105 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 95 and 105 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, 95 and 105:
What are the Multiples of 95?
What are the Multiples of 105?
Let’s take a look at the first 10 multiples for each of these numbers, 95 and 105:
First 10 Multiples of 95: 95, 190, 285, 380, 475, 570, 665, 760, 855, 950
First 10 Multiples of 105: 105, 210, 315, 420, 525, 630, 735, 840, 945, 1050
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 95 and 105 are 1995, 3990, 5985. Because 1995 is the smallest, it is the least common multiple.
The LCM of 95 and 105 is 1995.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 18 and 6?
What is the LCM of 22 and 23?
What is the LCM of 37 and 115?
What is the LCM of 73 and 107?
What is the LCM of 91 and 109?