If you mean: 14 and 62 then the LCM is 434
If you mean 18 and 36 then the LCM is 36
If you mean 4 and 28 then the LCM is 28
If you mean 7 and 14 then the LCM is 14
If you mean 12 and 48 then the LCM is 48
If you mean 5 and 8 then the LCM is 40
If you mean 17 and 13 then the LCM is 221
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If you mean: 10, 15 and 30 then LCM is 60
If you mean: 18, 27 and 54 then the LCM is 54
If you mean: 12, 24 and 48 then the LCM is 48
If you mean 10, 15 and 20 then the LCM is 60