The least common multiple of 14 and 21 is 42.
14, 28, 42, 56 ...
21, 42, 63, 84, ...
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The lowest common multiple - is 42 !
The Least Common Multiple of 18 and 21 is 126.
7
its 105
The least common multiple of 7, 14, 21 and 36 is: 252