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  2. Fill-In (puzzle) - Wikipedia

    en.wikipedia.org/wiki/Fill-In_(puzzle)

    A common variation on the standard Fill-In is using numbers, instead of specific words, sometimes called "cross numbers". [1] [8] In this puzzle, the entries could be listed as the number, a mathematical expression, or even an important year. [8] A more complex variation on the Fill-In is the "diagramless" Fill-In, where the grid is initially ...

  3. Unit circle - Wikipedia

    en.wikipedia.org/wiki/Unit_circle

    Since C = 2πr, the circumference of a unit circle is 2π. In mathematics, a unit circle is a circle of unit radius—that is, a radius of 1. [1] Frequently, especially in trigonometry, the unit circle is the circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.

  4. Circle packing in a square - Wikipedia

    en.wikipedia.org/wiki/Circle_packing_in_a_square

    Circle packing in a square is a packing problem in recreational mathematics, where the aim is to pack n unit circles into the smallest possible square. Equivalently, the problem is to arrange n points in a unit square aiming to get the greatest minimal separation, d n , between points. [ 1 ]

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  6. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The amount of bending is approximately ⁠ 1 / 28 ⁠ unit (1.245364267°), which is difficult to see on the diagram of the puzzle, and was illustrated as a graphic. Note the grid point where the red and blue triangles in the lower image meet (5 squares to the right and two units up from the lower left corner of the combined figure), and ...

  7. Category:Quiz games - Wikipedia

    en.wikipedia.org/wiki/Category:Quiz_games

    It should only contain pages that are Quiz games or lists of Quiz games, as well as subcategories containing those things (themselves set categories). Topics about Quiz games in general should be placed in relevant topic categories .

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    mail.aol.com

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  9. List of cross and circle games - Wikipedia

    en.wikipedia.org/wiki/List_of_cross_and_circle_games

    The design of most cross and circle games involves a circle divided into four equal portions by a cross inscribed inside it; the classic example of this design is the Korean game Yut. However, the term "cross and circle" is typically widened to include boards that replace the circle with a square, and cruciform boards that collapse the circle ...