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  2. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [2] and released to the public in January 2007. [3] Quizlet's primary products include digital flash cards , matching games , practice electronic assessments , and live quizzes.

  3. Eureka effect - Wikipedia

    en.wikipedia.org/wiki/Eureka_effect

    The problem consists of a 3 × 3 square created by 9 black dots. The task is to connect all 9 dots using exactly 4 straight lines, without retracing or removing one's pen from the paper. Kershaw & Ohlsson [29] report that in a laboratory setting with a time limit of 2 or 3 minutes, the expected solution rate is 0%.

  4. Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Main_Page

    The detector measures minuscule length variations in its two 3-kilometre (1.9-mile) arms induced by the passage of gravitational waves. The project, named after the Virgo galaxy cluster, was first approved in 1992 and construction was completed in 2003.

  5. Module (mathematics) - Wikipedia

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

    A right R-module M R is defined similarly in terms of an operation · : M × R → M. Authors who do not require rings to be unital omit condition 4 in the definition above; they would call the structures defined above "unital left R-modules". In this article, consistent with the glossary of ring theory, all rings and modules are assumed to be ...

  6. Eureka (word) - Wikipedia

    en.wikipedia.org/wiki/Eureka_(word)

    Eureka comes from Ancient Greek εὕρηκα (heúrēka) 'I have found (it)', which is the first person singular perfect indicative active of the verb εὑρίσκω heurískō ' I find '. [1] It is closely related to heuristic , which refers to experience-based techniques for problem-solving, learning, and discovery.

  7. Module:Math - Wikipedia

    en.wikipedia.org/wiki/Module:Math

    This module is subject to page protection.It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.

  8. Eureka - Wikipedia

    en.wikipedia.org/wiki/Eureka

    Eureka often refers to: Eureka (word) , a famous exclamation attributed to Archimedes Eureka effect , the sudden, unexpected realization of the solution to a problem

  9. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. [2] It is a contrived acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart." [3] A historically common type of CAPTCHA (displayed as reCAPTCHA v1) was first invented in 1997 by two groups working in parallel. This ...