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.


Four Good Measure

No problem for someone who had explored the Labyrinth. Here's one possible solution:

Fill the three-cup vessel to the top. Pour it all into the five-cup vessel.

Fill the three-cup vessel again. Pour all that will fit into the five-cup vessel; this will be only two cups, leaving one cup in the three-cup vessel.

Empty the five-cup vessel back into the bowl. Pour the one remaining cup into the five-cup vessel. Refill the three-cup vessel and add it to the five-cup. You now have four cups in the five-cup.

Drink it all up, and see how easy it was!

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