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  2. Koobits - Wikipedia

    en.wikipedia.org/wiki/Koobits

    KooBits (stylised as KooBits with capitalised K and B) designs and builds digital products for children and educators. KooBits was founded in 2016 by current CEO Stanley, with Professor Sam Ge Shuzhi and Dr Chen Xiangdong. [1] The trio saw an opportunity in the rapid growth of the ebook industry and decided to focus on creating software for ...

  3. Sum and Product Puzzle - Wikipedia

    en.wikipedia.org/wiki/Sum_and_Product_Puzzle

    Sum and Product Puzzle. The Sum and Product Puzzle, also known as the Impossible Puzzle because it seems to lack sufficient information for a solution, is a logic puzzle. It was first published in 1969 by Hans Freudenthal, [1] [2] and the name Impossible Puzzle was coined by Martin Gardner. [3] The puzzle is solvable, though not easily.

  4. Archimedes's cattle problem - Wikipedia

    en.wikipedia.org/wiki/Archimedes's_cattle_problem

    Archimedes's cattle problem (or the problema bovinum or problema Archimedis) is a problem in Diophantine analysis, the study of polynomial equations with integer solutions. Attributed to Archimedes , the problem involves computing the number of cattle in a herd of the sun god from a given set of restrictions.

  5. Darboux integral - Wikipedia

    en.wikipedia.org/wiki/Darboux_integral

    The definition of the Darboux integral considers upper and lower (Darboux) integrals, which exist for any bounded real -valued function on the interval The Darboux integral exists if and only if the upper and lower integrals are equal. The upper and lower integrals are in turn the infimum and supremum, respectively, of upper and lower (Darboux ...

  6. ‘Quant King’ Jim Simons was a math and investing ... - AOL

    www.aol.com/finance/quant-king-jim-simons-math...

    Jim Simons, the legendary "Quant King" who founded Renaissance Technologies, died Friday at the age of 86, after forever changing Wall Street with his genius for math and finding patterns in data.

  7. Problems, Problems, Problems - Wikipedia

    en.wikipedia.org/wiki/Problems,_Problems,_Problems

    Print ( paperback) Problems, Problems, Problems is a series of educational mathematics textbooks ranging from grade 7-12. The math questions are from previous math contests held by the Centre for Education in Mathematics and Computing at the University of Waterloo. The series is a resource to complement the Canadian high school curriculum and ...

  8. Stars and bars (combinatorics) - Wikipedia

    en.wikipedia.org/wiki/Stars_and_bars_(combinatorics)

    In the context of combinatorial mathematics, stars and bars (also called "sticks and stones", [1] "balls and bars", [2] and "dots and dividers" [3]) is a graphical aid for deriving certain combinatorial theorems. It can be used to solve many simple counting problems, such as how many ways there are to put n indistinguishable balls into k ...

  9. Landau's problems - Wikipedia

    en.wikipedia.org/wiki/Landau's_problems

    Landau's problems. At the 1912 International Congress of Mathematicians, Edmund Landau listed four basic problems about prime numbers. These problems were characterised in his speech as "unattackable at the present state of mathematics" and are now known as Landau's problems. They are as follows: