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2. 24 (puzzle) - Wikipedia

   en.wikipedia.org/wiki/24_(puzzle)

   The 24 puzzle is an arithmetical puzzle in which the objective is to find a way to manipulate four integers so that the end result is 24. For example, for the numbers 4, 7, 8, 8, a possible solution is . The problem has been played as a card game in Shanghai since the 1960s, [1] using playing cards. It has been known by other names, including ...

3. List of algorithms - Wikipedia

   en.wikipedia.org/wiki/List_of_algorithms

   Borwein's algorithm: an algorithm to calculate the value of 1/π. Gauss–Legendre algorithm: computes the digits of pi. Chudnovsky algorithm: a fast method for calculating the digits of π. Bailey–Borwein–Plouffe formula: (BBP formula) a spigot algorithm for the computation of the nth binary digit of π.

4. Root system - Wikipedia

   en.wikipedia.org/wiki/Root_system

   Thus, the exhaustive list of four root systems of rank 2 shows the geometric possibilities for any two roots chosen from a root system of arbitrary rank. In particular, two such roots must meet at an angle of 0, 30, 45, 60, 90, 120, 135, 150, or 180 degrees. Root systems arising from semisimple Lie algebras

5. List of educational video games - Wikipedia

   en.wikipedia.org/.../List_of_educational_video_games

   This is a list of notable educational video games. There is some overlap between educational games and interactive CD-ROMs and other programs (based on player agency), and between educational games and related genres like simulations and interactive storybooks (based on how much gameplay is devoted to education). This list aims to list games ...

6. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself. There are many areas of mathematics that include number theory (the study of numbers), algebra (the study of formulas and related structures), geometry (the study ...

7. List of conjectures - Wikipedia

   en.wikipedia.org/wiki/List_of_conjectures

   The following list is meant to serve as a repository for compiling a list of such ideas. The idea of the Pythagoreans that all numbers can be expressed as a ratio of two whole numbers. This was disproved by one of Pythagoras' own disciples, Hippasus, who showed that the square root of two is what we today call an irrational number. One story ...