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Math Tutor Solution: The LCM of 65 and 24 is 1560
Methods
How to find the LCM of 65 and 24 using Prime Factorization
As your math tutor, I'm here to guide you through this problem! To find the LCM of 65 and 24, 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 65:
And this is the prime factorization of 24:
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, 13, 2, 3
Through this we see that the LCM of 65 and 24 is 1560.
How to Find the LCM of 65 and 24 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 65 and 24 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, 65 and 24:
Let’s take a look at the first 10 multiples for each of these numbers, 65 and 24:
First 10 Multiples of 65: 65, 130, 195, 260, 325, 390, 455, 520, 585, 650
First 10 Multiples of 24: 24, 48, 72, 96, 120, 144, 168, 192, 216, 240
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 65 and 24 are 1560, 3120, 4680. Because 1560 is the smallest, it is the least common multiple.
The LCM of 65 and 24 is 1560.
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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