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Course: 6th grade > Unit 6
Lesson 11: Greatest common factorGreatest common factor review
Review greatest common factors (GCF) and try some practice problems.
What is GCF?
GCF stands for greatest common factor. The greatest common factor of two numbers is the greatest number that is a factor of both of them.
Finding greatest common factor
One way to find the GCF of two (or more!) numbers is to list the factors of each number and find the greatest factor they have in common.
Want to learn more about greatest common factors? Check out this video.
Example: GCF of and
Factors of :
Factors of :
Want to join the conversation?
- are factor and divisor the same thing?(29 votes)
- factors are for multiplication.
divisors are for division.(15 votes)
- What is a quicker way to do this?(9 votes)
- A very quick way is to use the cake/ladder method.(8 votes)
- this is comfusing can you help(9 votes)
- so just list all its divisors and see the biggest one that divides both of them.(1 vote)
- as my fortune cookie once said "never let things that dont matter distract you" :)(9 votes)
- why wold we do this(6 votes)
- I'm a little bit confused but I'm confident that my scores going to be good Hope me luck (<0>_<0>)(5 votes)
- This is hard for me tbh.(5 votes)
- that was super easy(5 votes)
- How Do You do this I am so confused on it I only got 3 out of 7 right(6 votes)
- try prime factorization.(2 votes)
- It took my a long time to get distributive property right(4 votes)