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  2. Three cups problem - Wikipedia

    en.wikipedia.org/wiki/Three_cups_problem

    The solvable version of the problem. Here, cups A and C are upside down, and cup B is upright. The three cups problem, also known as the three cup challenge and other variants, is a mathematical puzzle that, in its most common form, cannot be solved. In the beginning position of the problem, one cup is upside-down and the other two are right ...

  3. File:Three cups problem solvable.svg - Wikipedia

    en.wikipedia.org/wiki/File:Three_cups_problem...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. 25 Printable Brain Teasers You Can Print for Free - AOL

    www.aol.com/25-printable-brain-teasers-print...

    How many of these brain busters can you solve? The post 25 Printable Brain Teasers You Can Print for Free appeared first on Reader's Digest.

  5. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    Squaring the circle, the impossible problem of constructing a square with the same area as a given circle, using only a compass and straightedge. [7] Three cups problem – Turn three cups right-side up after starting with one wrong and turning two at a time. [8]

  6. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...

  7. List of puzzle topics - Wikipedia

    en.wikipedia.org/wiki/List_of_puzzle_topics

    Dexterity puzzle. Ball-in-a-maze puzzle; Brain teaser; Chess puzzle. Chess problem; Computer puzzle game; Cross Sums; Crossword puzzle; Cryptic crossword; Cryptogram

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  9. Four glasses puzzle - Wikipedia

    en.wikipedia.org/wiki/Four_glasses_puzzle

    In step 3, if a glass is face down, it is turned face up; otherwise, either glass is turned face down. The four glasses puzzle , also known as the blind bartender's problem , [ 1 ] is a logic puzzle first publicised by Martin Gardner in his "Mathematical Games" column in the February 1979 edition of Scientific American .

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