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It is not possible to give a sensible answer to this question. The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question!

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11y ago
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11y ago

Factor them.
3 x 7 = 21
2 x 2 x 3 x 5 = 60
Combine the factors, eliminating duplicates.
2 x 2 x 3 x 5 x 7 = 420, the LCM

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11y ago

You need at least two numbers to find an LCM.

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9y ago

By multiplying the the highest prime numbers which are 3 squared and 7 = 63

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7y ago

By comparing its multiples to the multiples of another number.

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8y ago

The LCM is 60.

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7y ago

20 and 30 have an LCM of 60.

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13y ago

LCM of 12 and 60 is 60.

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6y ago

42

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Q: How do you find the LCM for 9 and 21?
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