Solution: The GCF of 74 and 62 is 2
Methods
How to find the GCF of 74 and 62 using Prime Factorization
One way to find the GCF of 74 and 62 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 74?
What are the Factors of 62?
Here is the prime factorization of 74:
2
1
×
3
7
1
2^1 × 37^1
2 1 × 3 7 1
And this is the prime factorization of 62:
2
1
×
3
1
1
2^1 × 31^1
2 1 × 3 1 1
When you compare the prime factorization of these two numbers, you can see that there are matching prime factors. You can now find the Greatest Common Factor of 74 and 62 by multiplying all the matching prime factors to get a GCF of 74 and 62 as 4:
Thus, the GCF of 74 and 62 is: 4
How to Find the GCF of 74 and 62 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 74 and 62 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, 74 and 62:
Factors of 74: 1, 2, 37, 74
Factors of 62: 1, 2, 31, 62
When you compare the two lists of factors, you can see that the common factor(s) are 1, 2. Since 2 is the largest of these common factors, the GCF of 74 and 62 would be 2.
Find the GCF of Other Number Pairs
Want more practice? Try some of these other GCF problems:
What is the GCF of 30 and 46?
What is the GCF of 90 and 112?
What is the GCF of 11 and 53?
What is the GCF of 21 and 45?
What is the GCF of 145 and 82?