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  2. Ulam spiral - Wikipedia

    en.wikipedia.org/wiki/Ulam_spiral

    The number 1 has only a single factor, itself; each prime number has two factors, itself and 1; composite numbers are divisible by at least three different factors. Using the size of the dot representing an integer to indicate the number of factors and coloring prime numbers red and composite numbers blue produces the figure shown.

  3. Grid method multiplication - Wikipedia

    en.wikipedia.org/wiki/Grid_method_multiplication

    The grid method (also known as the box method) of multiplication is an introductory approach to multi-digit multiplication calculations that involve numbers larger than ten. Because it is often taught in mathematics education at the level of primary school or elementary school , this algorithm is sometimes called the grammar school method.

  4. Langton's ant - Wikipedia

    en.wikipedia.org/wiki/Langton's_ant

    L 1 L 2 NUL 2 L 1 R 2: Hexagonal grid, spiral growth. R 1 R 2 NUR 2 R 1 L 2 : Animation. The hexagonal grid permits up to six different rotations, which are notated here as N (no change), R 1 (60° clockwise), R 2 (120° clockwise), U (180°), L 2 (120° counter-clockwise), L 1 (60° counter-clockwise).

  5. Logic puzzle - Wikipedia

    en.wikipedia.org/wiki/Logic_puzzle

    The logic puzzle was first produced by Charles Lutwidge Dodgson, who is better known under his pen name Lewis Carroll, the author of Alice's Adventures in Wonderland.In his book The Game of Logic he introduced a game to solve problems such as confirming the conclusion "Some greyhounds are not fat" from the statements "No fat creatures run well" and "Some greyhounds run well". [1]

  6. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  7. School Mathematics Project - Wikipedia

    en.wikipedia.org/wiki/School_Mathematics_Project

    The School Mathematics Project arose in the United Kingdom as part of the new mathematics educational movement of the 1960s. [1] It is a developer of mathematics textbooks for secondary schools, formerly based in Southampton in the UK.

  8. Mighty Math - Wikipedia

    en.wikipedia.org/wiki/Mighty_Math

    The series were introduced to teach the concepts of math techniques and reinforcing math skills. Carnival Countdown was released in July 1996. It teaches counting, sums and early multiplication and division. Number Heroes was released that very same time. It teaches similar content to its prequel but with larger numbers plus fractions, geometry ...

  9. Delannoy number - Wikipedia

    en.wikipedia.org/wiki/Delannoy_number

    In mathematics, a Delannoy number counts the paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner (m, n), using only single steps north, northeast, or east. The Delannoy numbers are named after French army officer and amateur mathematician Henri Delannoy .