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  2. 1 + 1 + 1 + 1 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_1_%2B_1_%2B_1_%2B_%E...

    For some other divergent geometric series, including Grandi's series with ratio −1, and the series 1 + 2 + 4 + 8 + ⋯ with ratio 2, one can use the general solution for the sum of a geometric series with base 1 and ratio ⁠ ⁠, obtaining ⁠ ⁠, but this summation method fails for 1 + 1 + 1 + 1 + ⋯, producing a division by zero.

  3. List of unsolved problems in mathematics - Wikipedia

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

    Clay Mathematics Institute: 2000 Simon problems: 15 < 12 [7] [8] Barry Simon: 2000 Unsolved Problems on Mathematics for the 21st Century [9] 22 – Jair Minoro Abe, Shotaro Tanaka: 2001 DARPA's math challenges [10] [11] 23 – DARPA: 2007 Erdős's problems [12] > 934: 617: Paul Erdős: Over six decades of Erdős' career, from the 1930s to 1990s

  4. Operation (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Operation_(mathematics)

    In mathematics, an operation is a function from a set to itself. For example, an operation on real numbers will take in real numbers and return a real number. An operation can take zero or more input values (also called "operands" or "arguments") to a well-defined output value. The number of operands is the arity of the operation.

  5. Indian National Mathematical Olympiad - Wikipedia

    en.wikipedia.org/wiki/Indian_National...

    The Indian Olympiad Qualifier in Mathematics (IOQM) is a national exam for students in grades 8-12. It's used to shortlist students for HBCSE's Mathematical Olympiad program. Students must be under 20 years old by June 30 of the IMO year and cannot have passed Class 12.

  6. Tutorial - Wikipedia

    en.wikipedia.org/wiki/Tutorial

    At the two campuses of St. John's College, U.S. and a few other American colleges with a similar version of the Great Books program, a "tutorial" is a class of 12–16 students who meet regularly with the guidance of a tutor. The tutorial focuses on a certain subject area (e.g., mathematics tutorial, language tutorial) and generally proceeds ...

  7. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    The first known solution to complete enumeration was posted by QSCGZ (Guenter Stertenbrink) to the rec.puzzles newsgroup in 2003, [11] [12] obtaining 6,670,903,752,021,072,936,960 (6.67 × 10 21) distinct solutions.

  8. Three-part lesson - Wikipedia

    en.wikipedia.org/wiki/Three-part_lesson

    A three-part lesson is an inquiry-based learning method used to teach mathematics in K–12 schools. The three-part lesson has been attributed to John A. Van de Walle, a mathematician at Virginia Commonwealth University. [1] [2]

  9. Buffon's needle problem - Wikipedia

    en.wikipedia.org/wiki/Buffon's_needle_problem

    The short-needle problem can also be solved without any integration, in a way that explains the formula for p from the geometric fact that a circle of diameter t will cross the distance t strips always (i.e. with probability 1) in exactly two spots. This solution was given by Joseph-Émile Barbier in 1860 [5] and is also referred to as "Buffon ...