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Math Tutor Solution: The GCF of 67 and 5 is 1
Methods
How to find the GCF of 67 and 5 using Prime Factorization
One way to find the GCF of 67 and 5 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 67:
And this is the prime factorization of 5:
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 67 and 5 is 1.
Thus, the GCF of 67 and 5 is: 1
How to Find the GCF of 67 and 5 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 67 and 5 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, 67 and 5:
Factors of 67: 1, 67
Factors of 5: 1, 5
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 67 and 5 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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