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Anonymous
The LCM of 21, 84 and 126 is 252.
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The least common multiple (LCM) of 84, 126, and 140 is 840.
The LCM of 63 and 84 is 252.
The GCF is 21.
The LCM is 84.
LCM(21, 28, 42) = 84