Formulas for compounds
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All numbers have multiples. Some numbers have some of the same multiples as other numbers. These are known as common multiples. On the list of common multiples, one number is the smallest. This is the least common multiple.
The least common multiple of the numbers 72 and 21 is 504.
The least common multiple of the numbers 612 and 15 is 3,060.
The common multiples of 9 and 16 are 144, 288, 432 and so on.
You need at least two numbers to find an LCM.