Curious Calculations by Wolfram Alpha

Been a while since I looked at Wolfram Alpha.  Here is an example page of questions that WA can solve when asked.  Just click on each question on the link.  As you might expect, most of the questions here are data and calculation based.  The WA system also does natural language interpretation of the question.  The subtleties are interesting. So Watson is not the only expertise based questioning system out there.  Try the Wolfram Alpha computational knowledge engine. for your own questions.