LCM(45, 18) = 90.
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The LCM always be the largest of the given numbers or a multiple of the largest number. The largest number given is 45, but 18 will not divide evenly into 45. The next multiple of 45 is 90 (2 x 45). Since 90 is divisible by both 5 and 18, then 90 is the LCM.
The LCM of 18, 27, and 45 is 270
45 = 32 x 5 15 = 3 x 5 18 = 2 x 32 27 = 33 LCM = 2 x 33 x 5 = 270
The LCM of 18 and 6 is 18. The LCM of 18 and 6v is 18v.
The LCM of 12 and 45 is 180