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  2. Template:Signpost/Crossword - Wikipedia

    en.wikipedia.org/wiki/Template:Signpost/Crossword

    signpost-crossword-cluetable-answer; Answer -- formatted as monospace text with the same color as background. This causes some accessibility issues but per phab:T31118 they won't let us use <details> and <summary>

  3. Crossword - Wikipedia

    en.wikipedia.org/wiki/Crossword

    Crossword-like puzzles, for example Double Diamond Puzzles, appeared in the magazine St. Nicholas, published since 1873. [31] Another crossword puzzle appeared on September 14, 1890, in the Italian magazine Il Secolo Illustrato della Domenica. It was designed by Giuseppe Airoldi and titled "Per passare il tempo" ("To pass the time"). Airoldi's ...

  4. Glare (vision) - Wikipedia

    en.wikipedia.org/wiki/Glare_(vision)

    Disability glare impairs the vision of objects without necessarily causing discomfort. [4] This could arise for instance when driving westward at sunset. Disability glare is often caused by the inter-reflection of light within the eyeball, reducing the contrast between task and glare source to the point where the task cannot be distinguished.

  5. List of Martin Gardner Mathematical Games columns - Wikipedia

    en.wikipedia.org/wiki/List_of_Martin_Gardner...

    A topological problem with a fresh twist, and eight other new recreational puzzles 1972 May: Challenging chess tasks for puzzle buffs and answers to the recreational problems 1972 Jun: A miscellany of transcendental problems: simple to state but not at all easy to solve 1972 Jul: Amazing mathematical card tricks that do not require prestidigitation

  6. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

  7. Puzzle - Wikipedia

    en.wikipedia.org/wiki/Puzzle

    In a puzzle, the solver is expected to put pieces together (or take them apart) in a logical way, in order to find the solution of the puzzle. There are different genres of puzzles, such as crossword puzzles, word-search puzzles, number puzzles, relational puzzles, and logic puzzles. The academic study of puzzles is called enigmatology.

  8. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved mathematical problems, the Birch and Swinnerton-Dyer conjecture, Hodge conjecture, Navier–Stokes existence and smoothness, P versus NP problem, Riemann hypothesis, Yang–Mills existence and mass gap, and the Poincaré conjecture at the ...

  9. Cataract - Wikipedia

    en.wikipedia.org/wiki/Cataract

    Posterior capsular opacification, also known as after-cataract, is a condition in which months or years after successful cataract surgery, vision deteriorates or problems with glare and light scattering recur, usually due to thickening of the back or posterior capsule surrounding the implanted lens, so-called 'posterior lens capsule opacification'.