What is the least common multiple of 54 and 63?

Answer 1

The LCM of 54 and 72 is 216, which is the multiple of the highest power of prime factors from both numbers (23 x 33 = 2 x 2 x 2 x 3 x 3 x 3 = 216). (Prime factors: 54 = 2 x 33; 72 = 23 x 32)

Answer 2

378