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# Greatest Common Factor Using Factor Trees

## Multiplying only the same prime factors on each tree

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

## The Greatest Common Factor

by CK-12 //basic
Explains how to determine the greatest common factor of integers and expressions.
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• Video

## Example of Determining the Greatest Common Factor

by CK-12 //basic
Provides two examples of determining the greatest common factor by using prime factorization.
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