The LCM is: 315
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
14 = 2*7 45 = 5*9 LCM = 14*45 = 630
315
315
315
(4,5 and 7)140 (45 and 7)315
The Least Common Multiple (LCM) of 7, 27, and 45 is 945. 7 is prime and 27 = 33; they have no common factors so their LCM is 7x27=189. Now bring in 45 = 32x5. The only new factor here is 5, so the LCM of the 3 numbers is 189x5 = 945.
45 = 5×9 35 = 5×7 LCM = 5×7×9 = 315