Q:

What is the GCF of 8 and 13?

Accepted Solution

A:
Solution: The GCF of 8 and 13 is 1 Methods How to find the GCF of 8 and 13 using Prime Factorization One way to find the GCF of 8 and 13 is to compare the prime factorization of each number. To find the prime factorization, you can follow the instructions for each number here: What are the Factors of 8? What are the Factors of 13? Here is the prime factorization of 8: 2 3 2^3 2 3 And this is the prime factorization of 13: 1 3 1 13^1 1 3 1 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 8 and 13 is 1. Thus, the GCF of 8 and 13 is: 1 How to Find the GCF of 8 and 13 by Listing All Common Factors The first step to this method of finding the Greatest Common Factor of 8 and 13 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, 8 and 13: Factors of 8: 1, 2, 4, 8 Factors of 13: 1, 13 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 8 and 13 is 1. Find the GCF of Other Number Pairs Want more practice? Try some of these other GCF problems: What is the GCF of 46 and 43? What is the GCF of 98 and 97? What is the GCF of 125 and 90? What is the GCF of 143 and 57? What is the GCF of 41 and 22?