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Worksheets for the greatest common factor (GFC) and least common multiple (LCM) of numbers

You can create free printable worksheets for finding the greatest common factor (GFC) and least common multiple (LCM) of up to 6 different numbers. The worksheets are customizable with lots of options: you can choose the number ranges for the GCF and LCM separately, the number of problems, workspace, font size, and border. You can also make worksheets with mixed problems, including some for both GCF and LCM.

NOTE: The largest number allowed for GCF is 1,000,000 and for LCM 10,000 to be safe (to reduce the server load).

See below quick links for some common worksheet types:

Find the greatest common factor of 2 numbers between 1 and 50 (easy)
Find the greatest common factor of 2 numbers between 1 and 100
Find the greatest common factor of 3 numbers between 1 and 100

Find the least common multiple of 2 numbers between 2 and 30
Find the least common multiple of 2 numbers between 2 and 50
Find the least common multiple of 3 numbers between 2 and 30

Worksheet Generator - GCF / LCM

Columns:   Rows:
(These determine the number of problems)

Find the greatest common factor (GCF); range from to

Find the least common multiple (LCM); range from to


How many numbers? Find the GCF or LCM of numbers.

Number of empty lines below the problem (workspace)

Font:   Font Size:

Cell Padding:     Border:    

Additional title
& instructions
(HTML allowed) 
 

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Free math worksheets and practice - Adapted Mind