Question 1: Suppose a ghost floats by every two weeks and a skeleton rattles along every three days, a pumpkin rolls by every 6 days. If a ghost floated by, a skeleton rattled along and a pumpkin rolled by today, how long would it be before you see all three again on the same day?
Question 2: There just so happened to be a bat flying with the group today. The next time you see all four again is in 84 days. How often do the bats fly by?