The LCM of 15 and 189 is 945 because 945 is the first number that both 15 and 189 divide evenly into.
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The LCM is 1323.
The LCM is 198.
Since 189 is a multiple of both 9 and 27, it is automatically the LCM.
The LCM of 27 and 63 is 189. The LCM of 81 and 441 is 3969. The LCM of all four is 3969.
The LCM is 120.