A quick history of riddles, including what is perceived as the first riddle, the Sphinx.
We look at a particular type of logical riddles that involve groups of people who only lie, and others who only tell the truth. (This discussion can lead into logical operations like And and Or. We will discuss this in an upcomming tutorial.)
We have some fun. Can you tell me what's behind the green door? This game is fun to play with your family and friends. If you need more hints, ask me a question!