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The LCM of 21 and 19 is 399.
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Find least common multiple (LCM) of: 42 & 38 63 & 57 105 & 95 147 & 133 42 & 19 21 & 38 63 & 19 21 & 57 105 & 19 21 & 95 147 & 19 21 & 133
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