The zebra puzzle is a well-known logic puzzle. It is often called Einstein's Puzzle or Einstein's Riddle because it is said to have been invented by Albert Einstein as a boy; it is sometimes claimed that only 2% of the population can solve it. The puzzle is also sometimes attributed to Lewis Carroll. However, there is no known evidence for Einstein's or Carroll's authorship; and the original puzzle cited below mentions brands of cigarette, such as Kools, that did not exist during Carroll's lifetime or Einstein's boyhood.
There are several versions of this puzzle. The version below is quoted from the first known publication in Life International magazine on December 17, 1962. The March 25, 1963 issue contained the solution given below and the names of several hundred solvers from around the world.
Other articles related to "zebra puzzle, puzzle":
... Other versions of the puzzle have one or more of the following differences to the original puzzle Some colors, nationalities, cigarette brands, drinks ... These do not change the logic of the puzzle ... in swapping of the two corresponding houses with all their properties, but makes the puzzle a bit easier ...
Famous quotes containing the words puzzle and/or zebra:
“The at present unutterable things we may find somewhere uttered. These same questions that disturb and puzzle and confound us have in their turn occurred to all the wise men; not one has been omitted; and each has answered them, according to his ability, by his words and his life.”
—Henry David Thoreau (18171862)
“Apeneck Sweeney spreads his knees
Letting his arms hang down to laugh,
The zebra strips along his jaw
Swelling to maculate giraffe.”
—T.S. (Thomas Stearns)