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mental calculations

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  • Mental Calculation World Cup — is an international competition of mental calculators. Contents 1 Mental Calculation World Cup 2004 2 Mental Calculation World Cup 2006 3 Mental Calculation World Cup 2008 …   Wikipedia

  • Mental calculator — Mental calculators are people with a prodigious ability in some area of mental calculation, such as multiplying large numbers or factoring large numbers. Some rare mental calculators are autistic savants, with a narrow area of great skill and… …   Wikipedia

  • Mental calculation — comprises arithmetical calculations using only the human brain, with no help from calculators, computers, or pen and paper. People use mental calculation when computing tools are not available, when it is faster than other means of calculation… …   Wikipedia

  • mental arithmetic — UK US noun [uncountable] calculations that you do in your mind, without writing them down Thesaurus: general words relating to mathematics and geometryhyponym to calculate or countsynonym * * * ˌmental aˈrithmetic [mental arithmetic] …   Useful english dictionary

  • mental arithmetic — mental a rithmetic noun uncount calculations that you do in your mind, without writing them down …   Usage of the words and phrases in modern English

  • mental arithmetic — UK / US noun [uncountable] calculations that you do in your mind, without writing them down …   English dictionary

  • Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …   Wikipedia

  • George Lane — (born 1964 Fact|date=December 2007) is a British mental calculator and author. He is a three times world champion and one of only three Grandmasters of Mental Calculation, as recognised by the Mind Sports Organisation. His system of mental… …   Wikipedia

  • John Wallis — Infobox Scientist name = John Wallis box width = 300px |300px image width = 300px caption = birth date = birth date|1616|11|23 birth place = Ashford, Kent, England death date = death date and age|1703|10|28|1616|11|23 death place = Oxford,… …   Wikipedia

  • Jacques Inaudi — (October 15, 1867 November 10, 1950) was an Italian calculating prodigy.He was born in Onorato, Piedmont, Italy. As a child he was a sheepherder but showed aptitude for mental calculations. Inaudi s abilities attracted interest of showmen and he… …   Wikipedia

  • Napier's bones — Computing devices in Rabdology Napier s bones Promptuary …   Wikipedia

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