The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.


In The Grey Labyrinth, there is at least one unsolved puzzle at all times, available below. See if you can deduce the answer for yourself before we post it.  You can also find all the puzzles ever posted to the Grey Labyrinth in the Archives.

Current Unsolved Puzzles: 


Twenty Most Recent Solved Puzzles: