It is: 630
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Gcf= 3 lcm=78
If that's 21, 15 and 6, the LCM is 210. If that's 2115 and 6, the LCM is 4230.
The LCM is 84.
lcm(6, 7, 45) = 630. 6 = 2 x 3 7 = 7 45 = 3^2 x 5 lcm = 2 x 3^2 x 5 x 7 = 630
lcm(5, 3) = 15 lcm(5, 45) = 45 lcm(3, 45) = 45 lcm(5, 3, 45) = 45