## Factors

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A collection of math worksheets on finding factors, greatest common factors, and factor trees, as well as prime numbers & composite numbers.

To see Common Core Standards for these worksheets, click on the apple core symbol ().

Factors

Finding Factors FreeList the factors for the given numbers

Factor Trees

Factor Trees #1 MemberFind the prime factorization by completing the basic factor trees

Factor Trees #2 MemberMore basic factor trees for teaching prime factorization

Factor Trees #3 MemberComplete these factor trees (different style) to reduce a number into its prime factors.

Factor Trees #4 MemberMore factor trees for prime factorization.

Prime Numbers

Prime & Composite Numbers MemberIntroduction to finding prime and composite numbers

Prime & Composite Numbers 2 MemberPractice identifying prime and composite numbers.

Prime & Composite Table FreeComplete the prime-composite number table.

Prime Number Mouse Trail MemberColor the prime numbers to help the mouse find the cheese.

Prime & Composite Coloring Chart MemberColor the prime numbers red and the composite numbers blue.

Prime & Composite Questions MemberComplete the page of short-answer questions about prime and composite numbers.

Greatest Common Factor (GCF)

Greatest Common Factor FreeStep-by-step introduction for finding the GCF of number pairs

Find the GCF MemberFind the GCF of each pair of numbers.

Proper Factors and

Perfect Numbers

List the perfect factors of the given numbers. Perfect factors are factors of a number, excluding the number itself.

Proper Factors & Perfect Numbers MemberList the perfect factors of the given numbers. Then determine which number is a perfect number. (A perfect number is a number whose proper factors add up to the number itself.)

See Also:

Fraction Worksheets (Advanced)Simplifying fractions, equivalent fractions, and more.

Adding FractionsAdd fractions with the same and different denominators

Multiplication WorksheetsPractice basic multiplication skills with these printable worksheets and games

Least Common Multiple (LCM) WorksheetsWorksheets in which students determine the least common multiple, or LCM, for each number set