Solution: The GCF of 132 and 3 is 3
Methods
How to find the GCF of 132 and 3 using Prime Factorization
One way to find the GCF of 132 and 3 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 132?
What are the Factors of 3?
Here is the prime factorization of 132:
2
2
×
3
1
×
1
1
1
2^2 × 3^1 × 11^1
2 2 × 3 1 × 1 1 1
And this is the prime factorization of 3:
3
1
3^1
3 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 132 and 3 by multiplying all the matching prime factors to get a GCF of 132 and 3 as 9:
Thus, the GCF of 132 and 3 is: 9
How to Find the GCF of 132 and 3 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 132 and 3 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, 132 and 3:
Factors of 132: 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
Factors of 3: 1, 3
When you compare the two lists of factors, you can see that the common factor(s) are 1, 3. Since 3 is the largest of these common factors, the GCF of 132 and 3 would be 3.
Find the GCF of Other Number Pairs
Want more practice? Try some of these other GCF problems:
What is the GCF of 121 and 41?
What is the GCF of 35 and 147?
What is the GCF of 139 and 138?
What is the GCF of 32 and 111?
What is the GCF of 127 and 43?