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  2. 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 ...

  3. Maze: Solve the World's Most Challenging Puzzle - Wikipedia

    en.wikipedia.org/wiki/MAZE:_Solve_the_World's...

    Maze: Solve the World's Most Challenging Puzzle (1985, Henry Holt and Company) is a puzzle book written and illustrated by Christopher Manson. The book was originally published as part of a contest to win $10,000. Unlike other puzzle books, each page is involved in solving the book's riddle.

  4. Zebra Puzzle - Wikipedia

    en.wikipedia.org/wiki/Zebra_Puzzle

    The Zebra Puzzle is a well-known logic puzzle.Many versions of the puzzle exist, including a version published in Life International magazine on December 17, 1962. The March 25, 1963, issue of Life contained the solution and the names of several hundred successful solvers from around the world.

  5. Spot the difference - Wikipedia

    en.wikipedia.org/wiki/Spot_the_difference

    Solving "Spot the difference" by overlaying the left image (top left) with an inverse image (bottom left) of the right one (top right). Differences appear as non grey parts (bottom right) A way to solve a spot the difference puzzle digitally is to create a inverse version of one of the images to compare and to overlay it 50% on the other one.

  6. Game of the Day: Spot The Difference - AOL

    www.aol.com/news/2014-11-15-game-of-the-day-spot...

    Time to test your sleuthing skills with today's Game of the Day, Spot The Difference. In this hidden object puzzle game, you'll search and scan more than 100 levels of images, including ...

  7. I Tried the 'Harvard Riddle'—the 'Hardest Riddle in the World ...

    www.aol.com/tried-harvard-riddle-hardest-riddle...

    The answer to the Harvard riddle is a simple "No." Forget all of the filler words meant to trick you in the beginning, and pay attention to the last line. It asks you directly if you can solve the ...

  8. The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

    The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [1] [2] Boolos' article includes multiple ways of solving the problem.

  9. Game of the Day: Spot The Difference - AOL

    www.aol.com/news/2014-06-11-game-of-the-day-spot...

    Time to Spot The Difference! Today's Game of the Day is Spot the Difference the original hit classic! The game is simple: two images are placed side by side, and you have to point out the differences!