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.

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Most Unique

by Kevin J. Lin

We are all familiar with the multiple-choice question format which presents a series and asks us to select the item which "does not belong." Frequently it is a matter of opinion which element is the "most unique" in a given set.

Below are five images, no two of which are exactly identical. Your task is to select the image which is "most unique."

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