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 
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Brain Quest Workbook: Grade 6
The book boasts 300 pages jampacked with curriculumbased activities and exercises in every subject, with a focus on math and language arts. Original fullcolor illustrations throughout give the book a bright, lively style that will appeal to older kids. It is engaging, userfriendly, and written to make schoolwork fun. Sixth graders will delve into research and analysis, metaphor and meaning, ratios and proportions, expressions and equations, and geometry. The workbook covers spelling and vocabulary, writing, social studies, science, and more.