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The LCM of 21 and 9 is 63.
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Find least common multiple (LCM) of: 42 & 18 63 & 27 7 & 3 105 & 45 147 & 63 42 & 9 21 & 18 63 & 9 21 & 27 105 & 9 21 & 45 147 & 9 21 & 63
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