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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.

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2017-08-13 02:48:41
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Q: What are the common multiples of 7 14 and 21?
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