The LCM is 105.
the lcm of 3 and 7 is 21 and the lcm of 7 and 21 is 21, so the lcm of 3, 7 and 21 is the lcm of 21 and 21 which is 21.
105
3 x 7 = 21 5 x 7 = 35 3 x 5 x 7 = 105, the LCM
Prime factors of 21 are: 3 and 7 Prime factors of 40 are: 23 and 5 LCM = 23*3*5*7 = 840
3 is a factor of 21, so ignore it. 21 factors to [3 7] 35 factors to [5 7] common factor [7] LCM = 21 * 35 / 7 = 105 ■
The LCM is 84.
The LCM is 210.
The LCM is 42
3 x 5 = 15 3 x 7 = 21 3 x 5 x 7 = 105, the LCM
3 x 5 = 15 3 x 7 = 21 3 x 5 x 7 = 105, the LCM
The LCM of 7 21 35 is 105