Something slightly more mentally challenging. Some are easy, some you probably already know, others require lateral thinking and the rest... well you work it out :-). These have been collected from various parties, competitions, etc over the years as well as your own contributions.
Either have fun trying to solve them yourself or select a few and give them to others to work out. A link to the answers is at the end of the page.
See also our collection of quizzes to do online or print for use offline.