The least common multiple is smallest multiple shared by a set of numbers.

Finding the least common multiple is necessary when adding or subtracting fractions with different denominators.

en.wikipedia.org/wiki/Least_common_multiple

In arithmetic and number theory, the least common multiple, lowest common
multiple, or smallest common multiple of two integers a and b, usually denoted by
...

www.khanacademy.org/math/pre-algebra/pre-algebra-factors-multiples/pre-algebra-lcm/v/least-common-multiple-exercise

Sal finds the LCM (least common multiple) of 12 and 36, and of 12 and 18. He
shows how to do that using the prime factorization method, which is a just great!

www.khanacademy.org/math/algebra2/rational-expressions-equations-and-functions/adding-and-subtracting-rational-expressions/v/least-common-multiple-exercise

Sal finds the LCM (least common multiple) of 12 and 36, and of 12 and 18. He
shows how to do that using the prime factorization method, which is a just great!

www.mathsisfun.com/least-common-multiple.html

Least Common Multiple of 3 and 5: List the Multiples of each number,. The
multiples of 3 are 3, 6, 9, 12, 15, 18, ... etc. The multiples of 5 are 5, 10, 15, 20, 25,
...

www.math.com/school/subject1/lessons/S1U3L3GL.html

A common multiple is a number that is a multiple of two or more numbers. ... The
least common multiple (LCM) of two numbers is the smallest number (not zero) ...

www.calculatorsoup.com/calculators/math/lcm.php

Calculate the lcm of 2 or more values. Finds the lcm or least common multiple
using the gcd and Euclid's algorithm.

www.math.com/school/subject1/lessons/S1U3L3DP.html

The least common multiple, or LCM, is another number that's useful in solving
many math problems. Let's find the LCM of 30 and 45. One way to find the least ...

www.ixl.com/math/grade-6/least-common-multiple

Fun math practice! Improve your skills with free problems in 'Least common
multiple' and thousands of other practice lessons.

www.factmonster.com/ipka/A0933352.html

The lowest common multiple or least common multiple is the lowest multiple two
numbers have in common. There are two ways of finding the lowest common ...