Once upon a time, in a distant land where goats were more famous than galaxies, a clever TV show host, Mr. Barbounakis, had an idea. He...

There are 100 prisoners in a jail. Each one has a number from 1 to 100. In a room, there are 100 boxes numbered from 1 to 100. Each box...

About twenty years ago (if possible), I was a student at the University of Athens. One of the hot topics at the time in the School of...