A deep sea fishing boat is lying in the harbour. Over its side hangs a rope ladder, with its end just touching the water. Rungs on the ladder are one foot apart. The tide rises at the rate of eight inches an hour. At the end of six hours, how many rungs will be covered?
This scam puzzle used to start "The Queen Mary is lying in Tilbury Dock.........." The expected answer was that given by crofter. But the real answer should have been "The Queen Mary won't fit into Tilbury Dock.