Listed below are the verified claims for the record listed.
Mental Calculation, Square Roots - Current world record
1.
Granth Rakesh Thakkar (India) calculated the square roots of ten six digit numbers in 47.7 seconds on 16 July 2022
at the Mental Calculation World Cup 2022 in Paderborn, Germany.
Previous verified claims
1.
Granth Rakesh Thakkar (India) calculated the square roots of ten six digit numbers in 1:01.9 minutes
on 7 October 2014 in Dresden, Germany.
2.
Granth Rakesh Thakkar (India) calculated the square roots of ten six digit numbers in 1:07.05 minutes
at the Memoriad Center in Ankara, Turkey on 2 September 2013.
3.
Priyanshi Somani (India) calculated the square roots of ten six digit numbers in 2:43.05 minutes on 3 January 2012 at
Lourdes Covent School in Surat, Gujarat, India. As required by the rules, all results have been correct to 8 digits.
4.
Hakan Gürbaşlar (Turkey) calculated the square roots of ten six digit numbers in 4:55 minutes on 17 December 2011 in Ankara, Turkey.
As required by the rules, all results have been correct to 8 digits.
5.
Selçuk Soner Akgül (Turkey) calculated the square roots of ten six digit numbers in 6:19 minutes on 2 June 2010 at Nermin Mehmet Çekiç Anadolu Lisesi, Ankara.
As required by the rules, all results have been correct to 8 digits.
6.
Hakan Gürbaşlar (Turkey) calculated the square roots of ten six digit numbers in 6:37 minutes
on 20 March 2010 at the Middle East Technical University in Ankara.
As required by the rules, all results have been correct to 8 digits.
7.
Selçuk Soner Akgül (Turkey) calculated the square roots of ten six digit numbers in 7:37 minutes at the Memoriad Turkey on 6 September 2009 in Ankara.
As required by the rules, all results have been correct to 8 digits.
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