A common multiple of 12,15, and 28 is 420. (15 multipled by 28 equals 420 and 12 multipled by 35 equals 420)
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the LCM of 12 and 28 is 84
the least common multiple is 84
The least common multiple of 12 and 28 is 72. 12:12,24,36,48,60,72 18:18,36,54,72
Since the list of numbers is infinite, there is no such thing as the Greatest Common Multiple.
The Least Common Multiple (LCM) for 4 7 2 is 28.