Puzzles - XKCD Wiki. This is a page for problems/puzzles which appear simple but are fiendishly counterintuitive.
Try to keep a nice balance and add quality puzzles. Perhaps solutions can be discussed on the talk page. We can think of some way to organize it as we add more puzzles. Note: If you don't think a particular problem is interesting enough to be included here, don't hesitate to say so on the talk page and, if others agree, remove it. Every problem on this page should be subtle, interesting, and worthwhile to people who like puzzles. Free Puzzles. Rec.puzzles Archive (logic), part 25 of 35.