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Uploaded by MentalCalculator on Nov 6, 2008
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 time of 1 minute, equalling the world record.
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well i can only calculate 9 per minute
marwanelmounajjed 2 years ago
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well i can only calculate 9 per minute
marwanelmounajjed 2 years ago