Least Common Multiple Worksheets

Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.

Grade 6CCSS 6.NS.B.4Answer key includedPDF · Print

Easy: Two numbers from 2 to 12

Preview shows 6 of 12 questions. Every sheet is new; open it to change any question.

Worksheet variations

The least common multiple is the smallest number that each number divides into evenly. It is the lowest common denominator when adding fractions.

Find the least common multiple (LCM).

Multiplying the numbers together, which gives a common multiple but not always the least.
Confusing the LCM with the GCF.
Missing a prime factor that appears in only one number.

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