Question

Two ships sail between New York and Paris. One makes the round trip in 16 days. The other ship makes the round trip in 12 days. They both leave New York today. In how many days will both ships leave New York together again?

Answer 1

Explanation:

LCM of 16 and 12 is what ?

Using Prime factorization:

16 = 2 x 2 x 2 x 2

12 = 2 x 2 x 3

LCM = 2 x 2 x 2 x 2 x 3 = 48 days