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Math Tutor Solution: The LCM of 95 and 90 is 1710
Methods
How to find the LCM of 95 and 90 using Prime Factorization
As your math tutor, I'm here to guide you through this problem! To find the LCM of 95 and 90, one effective method is comparing their prime factorizations. Start by breaking each number down into its prime factors. Follow these steps to determine the prime factorization of each number:
Here is the prime factorization of 95:
And this is the prime factorization of 90:
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, 2, 3
Through this we see that the LCM of 95 and 90 is 1710.
How to Find the LCM of 95 and 90 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 95 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 in the links below for each number.
Let’s take a look at the multiples for each of these numbers, 95 and 90:
Let’s take a look at the first 10 multiples for each of these numbers, 95 and 90:
First 10 Multiples of 95: 95, 190, 285, 380, 475, 570, 665, 760, 855, 950
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 95 and 90 are 1710, 3420, 5130. Because 1710 is the smallest, it is the least common multiple.
The LCM of 95 and 90 is 1710.
Math Tutor Suggests: Find the LCM of Other Number Pairs
Want more practice? As a math tutor, I encourage you to try some of these other LCM problems:
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