MentalCalculator
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Willis Dysart
MentalCalculator
176 views
"The most amazing calculator in the world today" - Robert Ripley.
Recorded 5 July 1938.
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Shakuntala Devi
MentalCalculator
3,305 views
Shakuntala Devi in 1951
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Gert Mittring (2)
MentalCalculator
5,447 views
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Jan van Koningsveld (3)
MentalCalculator
1,725 views
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Rudiger Gamm
MentalCalculator
3,106 views
Memoriad 2008, Istanbul.
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Alberto Coto
MentalCalculator
1,339 views
Memoriad 2008, Istanbul.
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Alberto Coto / Salvador Bisshopp Flores
MentalCalculator
594 views
Sparring at Memoriad 2008 (Istanbul).
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Jan van Koningsveld (2)
MentalCalculator
771 views
On 2 November 2008, at the Istanbul Memoriad, Jan van Koningsveld correctly identified the day of the week for 56 dates randomly selected from the period 1600-2100 in a tim...
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Willem Bouman (2)
MentalCalculator
956 views
Rekenwonder Willem Bouman featured on Dutch TV in 2008.
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Mental Calculation World Cup 2006
MentalCalculator
8,266 views
4 November 2006.
Giessen, Germany.
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