Harder logic puzzles for adults, however, are often deceptively ... Like some of the hardest math puzzles and math riddles, these puzzles can get very complex. If you look for them online, you ...

Here’s a fairly recent twist on an old type of logic puzzle. A logician vacationing in the South Pacific finds himself on an island inhabited by the two proverbial groups of liars and truth-tellers.

Experience math in a whole new way. We'll play fun and challenging problem-solving games and puzzles from around the world, including Ancient China and Egypt, Europe, Asia, Africa and the Americas. We ...