The LCM of 15 and 33 is 165
Break them down into prime factors:
33 = 3 x 11
15 = 3 x 5.
Multiply all the factors apart from one instance of any that appear in both 33 and 15:
3 x 5 x 11 is the answer
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Least Common Multiple (LCM) for 33 15 20 is 660.
The least common multiple of 3 9 and 33 is 99. 3X33=99 9X10=99 33X3=99 you can also list the multiples 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,91,93,96,99 9,18,27,36,45,54,63,72,81,90,99 33,66,99
The COMMON multiples of 11 require at least one other number with which the multiple is COMMON. The COMMON multiples will be multiples of 11. The multiples of 11 between 1 and 100 are {11, 22, 33, 44, 55, 66, 77, 88, 99}, thus the COMMON multiples of 11 [with other numbers] wil be one, or more of this set.
Their lowest common multiple is 63.
The least common multiple of 12, 22, and 33 is 132.