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Math Tutor Solution: The GCF of 4 and 111 is 1
Methods
How to find the GCF of 4 and 111 using Prime Factorization
One way to find the GCF of 4 and 111 is to compare the prime factorization of each number. To find the prime factorization, you can follow the instructions for each number here:
Here is the prime factorization of 4:
And this is the prime factorization of 111:
When you compare the prime factorization of these two numbers, you can see that there are no matching prime factors. When this is the case, it means that there are no common factors between these two numbers. As a result, the GCF of 4 and 111 is 1.
Thus, the GCF of 4 and 111 is: 1
How to Find the GCF of 4 and 111 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 4 and 111 is to find and list all the factors of each number. Again, you can see how this is done by looking at the “Factors of” articles that are linked to above.
Let’s take a look at the factors for each of these numbers, 4 and 111:
Factors of 4: 1, 2, 4
Factors of 111: 1, 3, 37, 111
When you compare the two lists of factors, you can see that the only common factor is 1. So, in this case, the GCF of 4 and 111 is 1.
Math Tutor Suggests: Find the GCF of Other Number Pairs
Want more practice? Try some of these other GCF problems walkthrough from math tutors:
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