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The LCM of 21 and 128 is 2688.
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Find least common multiple (LCM) of: 42 & 256 63 & 384 105 & 640 147 & 896 42 & 128 21 & 256 63 & 128 21 & 384 105 & 128 21 & 640 147 & 128 21 & 896
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