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The total number of integers that are multiples of both 9 and 21 is infinite. Here are the first few: 63, 126, 189, 252, 315, 378, 441, 504 . . .

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8y ago
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8y ago

Actually, the total number of integers that are multiples of both 21 and 9 is infinite. Here are the first few: 63, 126, 189, 252, 315, 378, 441, 504, 567 . . .

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9y ago

189. 630 and 1890.

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Q: What are the three common multiples of 21 and 9?
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