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The LCM of 21 and 72 is 504.
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Find least common multiple (LCM) of: 42 & 144 63 & 216 7 & 24 105 & 360 147 & 504 42 & 72 21 & 144 63 & 72 21 & 216 105 & 72 21 & 360 147 & 72 21 & 504
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