The puzzles in this class are extra problems to work on during the course. You do not need to submit your solutions. In fact, there is no way to submit your solutions. However, you should feel free to discuss them in the appropriate Discussion Forum. They are included here partly for their entertainment value but also because they cannot be solved without logical thought. Note that all of the puzzles can be solved using only common knowledge and the information supplied in the problem statements. There are no tricks of wording, unspoken assumptions, or anything like that.
If you cannot get enough of traditional logic puzzles, you might consider visiting one of the many Logic puzzle sites. The Puzzle Baron's site, listed below, offers lots of puzzles with a range of difficulties.