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Q: What are the first 3 common multiples of 16and 21?

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21, 42 and 63

They are: 21, 42 and 63

21

If that's 9, 14 and 21, the first three common multiples are 126, 252 and 378.

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

105 and 210

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.

there are infinite amount of common multiples.

They are multiples of 63

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.

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 3 and 21 are 21, 42, 63 and so on.

63, 126, 189

7, 14 and 21.

336, 672, 1008

7, 14, 21

63, 126, 189

63, 126, 189.

63, 126, 189

63, 126, 189

84, 168, 252

63, 126, 189

They are: 63, 126, 189.