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.


Pencils Out


Previously, we discussed a problem of getting multiple quarters to all touch each other simultaneously. Now try it with pencils. Is it possible to arrange seven pencils in a manner such that each pencil touches every other pencil? Will your solution work with brand new, unsharpened pencils?

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