Their only common factor is 1, so the LCM is the product of the two: 2 x 15 = 30
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The LCM of 15, 9 and 2 is 90.
The LCM=60
lcm(6, 12, 9, 15) = 180 6 = 2 x 3 12 = 2^2 x 3 9 = 3^2 15 = 3 x 5 lcm = 2^2 x 3^2 x 5 = 180
30
The LCM is 90.