What is the LCM of 54 90 and 108?

Answer 1

540

Express each number in its prime factorisation in power form and take the highest power of each prime across all the numbers:

54 = 2 x 33

90 = 2 x 32 x 5

108 = 22 x 33

LCM = 22 x 33 x 5

= 540