LCM: 21
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The least common multiple of 7, 14, 21 and 36 is: 252
The LCM of 7, 21 and 35 is 105.
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
3*5*7
The least common multiple of 14 and 21 is 42.14, 28, 42, 56 ...21, 42, 63, 84, ...