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3: 3

28: 7, 2, 2

21: 7, 3

LCM = 3x7x4 = 84

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13y ago

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LCM of 3, 8 and 21 is 84...

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14y ago
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84

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Wiki User

11y ago
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Q: What is the LCM of 3 28 and 21?
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