April Answer:

Problem: "A scheduling disaster!" exclaimed Leo, the theme park director when he realized the rides were off schedule. The roller coasters at his amusement park were all supposed to run at the same time. Unfortunately this morning, The Monster was starting every six minutes, The Mountain of Terror every twelve minutes, The Spiral every three minutes, and The Death-Defying Drop every eight minutes. If all of the roller coasters have just started at the same time, how many times will one or more rides run before they are all back on schedule at the same time again?

Solution: They will run at the exact time 24 minutes from now. In the meantime, one or more rides will run 9 times.