Since 20 is a multiple of 4, it is automatically the LCM.
The LCM of 3, 4 & 20 is... 60
The LCM is 12.
20
The LCM of 4 and 5 is 20.
The LCM of 4 and 20 is 20
The LCM is 20.
4 l 12, 20 l 3, 5 4*3*5 = 60 15 l 45, 60 3, 4 15*3*4 = 180 LCM = 180
lcm(16, 20, 15) = 240. 16 = 2^4 20 = 2^2 x 5 15 = 3 x 5 lcm = 2^4 x 3 x 5 = 240
LCM(4, 5, 10) = 20
LCM of 4, 10, and 20 = 20
LCM(4, 5) = 20.