The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.
The least common multiple of 30, 70, and 80 is 1680.
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The Least Common Multiple (LCM) for 30 70 is 210.
210
630
The least common multiple of the numbers 8, 20 and 70 is 280.
70