MATH SOLVE

4 months ago

Q:
# What is the GCF of 67 and 68?

Accepted Solution

A:

Solution: The GCF of 67 and 68 is 1
Methods
How to find the GCF of 67 and 68 using Prime Factorization
One way to find the GCF of 67 and 68 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 67?
What are the Factors of 68?
Here is the prime factorization of 67:
6
7
1
67^1
6 7 1
And this is the prime factorization of 68:
2
2
×
1
7
1
2^2 × 17^1
2 2 × 1 7 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 67 and 68 is 1.
Thus, the GCF of 67 and 68 is: 1
How to Find the GCF of 67 and 68 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 67 and 68 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 68:
Factors of 67: 1, 67
Factors of 68: 1, 2, 4, 17, 34, 68
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 68 is 1.
Find the GCF of Other Number Pairs
Want more practice? Try some of these other GCF problems:
What is the GCF of 145 and 142?
What is the GCF of 103 and 143?
What is the GCF of 62 and 123?
What is the GCF of 87 and 52?
What is the GCF of 96 and 63?