the next common multiple of 9and 21is126
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The LCM of 6, 9, and 21 is 126
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 9, 14, and 21 is 126.
The least common multiple is the smallest positive number that is the multiple of two or more numbers. 3: 3, 6, 9, 12, 15, 18, 21 21: 21 The LCM of 3 and 21 is 21.
A common multiple is 9*8*10*12 = 8640, though that is not the least common multiple.
The least common multiple of 9, 18, and 27 is 54.