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A mental calculator or human calculator is a person with a prodigious ability in some area of mental calculation (such as adding, subtracting, multiplying or dividing large numbers). In 2005, a group of researchers led by Michael W. O'Boyle, an American psychologist previously working in Australia and now at Texas Tech University , has used MRI ...
Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than other means of calculation (such as conventional educational institution ...
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Rüdiger Gamm (born 10 July 1971) is a German "mental calculator".He attained the ability to mentally evaluate large arithmetic expressions at the age of 21. [citation needed] He can also speak backwards, and calculate calendars.
Robert Fountain (born in 1969) is a British mental calculator. He won the first Mental Calculation World Cup in 2004 and the second Mental Calculation World Cup in 2006. [1] [2] [3] In 1999 he was recognised by the Mind Sports Organisation as the first Grandmaster of Mental Calculation. Fountain was inspired to take up mental calculation as a ...
Zerah Colburn (September 1, 1804 – March 2, 1839) [1] [2] [3] was an American child prodigy of the 19th century who gained fame as a mental calculator. [ 4 ] Biography
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