Example: 30 and 42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Combine the factors, eliminating duplicates.
2 x 3 x 5 x 7 = 210, the LCM
Chat with our AI personalities
least common multiple
the least common multiple, or LCM
least common multiple, or LCM.
Least common multiple is abbreviated as LCM.
LCM in math means least common multiple. So, for example, in the case of 2 and 18, the least common multiple is 18 because that is the lowest valued number that both 2 and 18 share. An another example is the case of 5 and 12. The least common multiple will be 5 times 12, because 5 and 12 do not have any common factors.