Solution: The LCM of 1 and 90 is 90
Methods
How to Find the LCM of 1 and 90 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 1 and 90 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 90?
Let’s take a look at the first 10 multiples for each of these numbers, 1 and 90:
First 10 Multiples of 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
First 10 Multiples of 90: 90, 180, 270, 360, 450, 540, 630, 720, 810, 900
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 90 are 90, 180, 270. Because 90 is the smallest, it is the least common multiple.
The LCM of 1 and 90 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 142 and 148?
What is the LCM of 66 and 149?
What is the LCM of 58 and 22?
What is the LCM of 61 and 65?
What is the LCM of 100 and 108?