Solution: The LCM of 73 and 35 is 2555
Methods
How to find the LCM of 73 and 35 using Prime Factorization
One way to find the LCM of 73 and 35 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 73?
What are the Factors of 35?
Here is the prime factorization of 73:
7
3
1
73^1
7 3 1
And this is the prime factorization of 35:
5
1
×
7
1
5^1 × 7^1
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: 73, 5, 7
5
1
×
7
1
×
7
3
1
=
2555
5^1 × 7^1 × 73^1 = 2555
5 1 × 7 1 × 7 3 1 = 2555
Through this we see that the LCM of 73 and 35 is 2555.
How to Find the LCM of 73 and 35 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 73 and 35 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, 73 and 35:
What are the Multiples of 73?
What are the Multiples of 35?
Let’s take a look at the first 10 multiples for each of these numbers, 73 and 35:
First 10 Multiples of 73: 73, 146, 219, 292, 365, 438, 511, 584, 657, 730
First 10 Multiples of 35: 35, 70, 105, 140, 175, 210, 245, 280, 315, 350
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 73 and 35 are 2555, 5110, 7665. Because 2555 is the smallest, it is the least common multiple.
The LCM of 73 and 35 is 2555.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 48 and 85?
What is the LCM of 74 and 83?
What is the LCM of 30 and 62?
What is the LCM of 118 and 131?
What is the LCM of 132 and 139?