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The LCM of 27 and 21 is 189.
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Find least common multiple (LCM) of: 54 & 42 81 & 63 9 & 7 135 & 105 189 & 147 54 & 21 27 & 42 81 & 21 27 & 63 135 & 21 27 & 105 189 & 21 27 & 147
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