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Q: What are the common multiples of 21?

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LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.

Multiples of 21 include 21, 42, 63, 84 and 105. For them to be common, they need to be compared to another set of multiples.

The common multiples of 9 and 21 are 63, 126, 189 and so on.

The common multiples of 9 and 21 are 63, 126, 189 and so on.

Two common multiples of 21 and 15 are 105 and 315.

there are infinite amount of common multiples.

The common multiples of 3 and 21 are 21, 42, 63 and so on.

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.

They are multiples of 63

Multiples of 21 include 21, 42, 63, 84 and so on. For them to be common, they need to be compared to another set of multiples.

The common multiples of 7, 14, and 21 are the infinite set of multiples of their least common multiple, which is 42. So the common multiplesof 7, 14, and 21 are 42, 84, 126, 168, and so on.Any multiple of 42.

Any pair of numbers has an infinite set of common multiples. The lowest common multiple of 9 and 21 is 63 and the others are multiples of this, e.g. 63, 126, 189, 252, 315, ...

Odd multiples of 21.

Common multiples result from comparing one number to at least one other. You've neglected to mention that other number. Multiples of 21 in that range are 21, 42, 63 and 84.

Any multiple of 21.

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

Common multiples include 168, 336 and 504

The Least Common Multiple of 21 and 30 is 210.

The common multiples of 3 and 7 are 21, 42, 63 and so on.

105

The LCM is 189.

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

There are infinitely many common multiples of 21 and 23. One such is 10626.

21, 42 and 63

They are: 21, 42 and 63

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