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Q: What to do to find the least common multiples of 21 and 25?

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The least common multiple of the numbers 72 and 21 is 504.

The least common multiple or LMC of 15 and 21 is 105!!!

Multiply 21 and 11 to get a common multiple. Since 21 and 11 have no common factors, that also happens to be the least common multiple.All other common multiples are multiples of this least common multiple.

105

It is: 126

84

Their product.

The least common multiple of 3, 21, and 56 is 168.

The Least Common Multiple of 21 and 30 is 210.

The Least Common Multiple (LCM) of (3,7) is 21.

It is 210.

The LCM is: 42

84

126

The LCM is 63.

The LCM is 189.

It is: 42

You need at least two numbers to find a common multiple. Multiples of 21 in that range include 21, 42, 63 and 84

The Least Common Multiple (LCM) for 21 24 is 168.

It is: 126

315

210, 420, 630, 840, 1050 Five common multiples. Only one can be least.

Since this is a single number, you could say that it shares all of its multiples with itself. So the least multiple of the number is itself. However, determining a least common multiple generally requires at least two numbers from which to find the LCM.

You need at least two numbers to find an LCM.Multiples of 7 include 14, 21 and 28.

You can have three common multiples, but only one can be least and that's 126. Others include 252 and 378.