Solution: The LCM of 1 and 40 is 40
Methods
How to Find the LCM of 1 and 40 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 1 and 40 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 for those here:
What are the Multiples of 1?
What are the Multiples of 40?
Let’s take a look at the first 10 multiples for each of these numbers, 1 and 40:
First 10 Multiples of 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
First 10 Multiples of 40: 40, 80, 120, 160, 200, 240, 280, 320, 360, 400
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 1 and 40 are 40, 80, 120. Because 40 is the smallest, it is the least common multiple.
The LCM of 1 and 40 is 40.
Continue Practicing by Finding the LCM of Other Numbers
Take a look at some of our other walkthroughs, and you’ll be sure to be an expert at finding the LCM of any numbers in no time!
What is the LCM of 40 and 25?
What is the LCM of 83 and 38?
What is the LCM of 137 and 117?
What is the LCM of 34 and 84?
What is the LCM of 35 and 95?