# If a ferry departs for New York and Big Ben chimes at the same time at 12:30 PM, how can you determine when both events will occur again at the same time?

If the frequency of ferry departures is one every $x$ minutes and Big Ben chimes every 60 minutes, or hour, then all that is required is to find the lowest common multiple of $x$ and 60, then convert this to hours by dividing by 60 and add the result to 12:30 PM.