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  2. 15 puzzle - Wikipedia

    en.wikipedia.org/wiki/15_puzzle

    To solve the puzzle, the numbers must be rearranged into numerical order from left to right, top to bottom. The 15 puzzle (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and more) is a sliding puzzle. It has 15 square tiles numbered 1 to 15 in a frame that is 4 tile positions high and 4 tile positions wide, with one ...

  3. Mythical number - Wikipedia

    en.wikipedia.org/wiki/Mythical_number

    A mythical number is a number used and accepted as deriving from scientific investigation and/or careful selection, but whose origin is unknown and whose basis is unsubstantiated. An example is the number 48 billion, which has often been accepted as the number of dollars per year of identity theft.

  4. Tetractys - Wikipedia

    en.wikipedia.org/wiki/Tetractys

    The first four numbers symbolize the musica universalis and the Cosmos as: Monad – Unity; Dyad – Power – Limit/Unlimited (peras/apeiron) Triad – Harmony; Tetrad – Kosmos [4] The four rows add up to ten, which was unity of a higher order (The Dekad). The Tetractys symbolizes the four classical elements—air, fire, water, and earth.

  5. Icons of Mathematics - Wikipedia

    en.wikipedia.org/wiki/Icons_of_Mathematics

    Icons of Mathematics: An Exploration of Twenty Key Images is a book on elementary geometry for a popular audience. It was written by Roger B. Nelsen and Claudi Alsina, and published by the Mathematical Association of America in 2011 as volume 45 of their Dolciani Mathematical Expositions book series.

  6. Sacred geometry - Wikipedia

    en.wikipedia.org/wiki/Sacred_geometry

    According to Stephen Skinner, the study of sacred geometry has its roots in the study of nature, and the mathematical principles at work therein. [5] Many forms observed in nature can be related to geometry; for example, the chambered nautilus grows at a constant rate and so its shell forms a logarithmic spiral to accommodate that growth without changing shape.

  7. Arithmologia - Wikipedia

    en.wikipedia.org/wiki/Arithmologia

    The work discussed the significance of numbers in astrology, divination, magic formulas, amulets, seals and symbolic matrices. [ 3 ] [ 6 ] Kircher's purpose, as he declared in the final chapter, was to articulate a Christian philosophy of number, revealing the hidden harmonies within the material world and its connections with the spiritual.

  8. Mathematical puzzle - Wikipedia

    en.wikipedia.org/wiki/Mathematical_puzzle

    Mathematical puzzles are sometimes used to motivate students in teaching elementary school math problem solving techniques. [1] Creative thinking – or "thinking outside the box" – often helps to find the solution.

  9. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]