The least common multiple of 1830 , 42 = 12,810
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The LCM is 42
The least common multiple (LCM) of 2 and 42 is 42.
The LCM is 336.
Since 42 is a multiple of 2, it is automatically the LCM.
Whenever one number is a multiple of the other, the LCM is the larger number and the GCF is the smaller number. The difference is 42.