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Least common multiple

Find the smallest positive multiple shared by both numbers.

How to use this tool

Find the smallest positive multiple shared by both numbers.

Choose largest starting number and the number of questions.
Find the smallest positive multiple shared by both numbers.
Print the practice pages for learners; keep the answer pages for checking.

Up to 24 questions. Some topics use products of the selected range, so final values can be larger. Questions may repeat in small ranges.

Your entries stay in this browser. Print at 100% scale on matching A4 or Letter paper. Printing help

Sample questions

LCM of 3 and 5?
LCM of 7 and 1?
LCM of 3 and 12?

Check answers

15
7
12

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