Solution: The LCM of 90 and 1 is 90
Methods
How to Find the LCM of 90 and 1 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 90 and 1 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 90?
What are the Multiples of 1?
Let’s take a look at the first 10 multiples for each of these numbers, 90 and 1:
First 10 Multiples of 90: 90, 180, 270, 360, 450, 540, 630, 720, 810, 900
First 10 Multiples of 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
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 90 and 1 are 90, 180, 270. Because 90 is the smallest, it is the least common multiple.
The LCM of 90 and 1 is 90.
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 105 and 142?
What is the LCM of 60 and 2?
What is the LCM of 138 and 57?
What is the LCM of 38 and 78?
What is the LCM of 77 and 80?