What is the LCM of 15 21 27?

Answer 1

15 = 3 x 5
21 = 3 x 7
27 = 3 x 3 x 3

hcf of 15 and 21 is 3

lcm of 15 and 21 = 15 x 21 / 3 = 105

hcf of 105 and 27 = 3

lcm of 105 and 27 = 105 x 27 / 3 = 945