Mental Calculation World Ranking Lists

The general rules for calculating records and the specific rules for thecategories at the Mental Calculation World Cup apply.

Country names in bold script indicate national records.


Addition

ten tasks for adding ten 10-digit-numbers

Jeonghee Lee
South Korea
100
record attempt, Dwight Morrow High School, Englewood, New Jersey, 2014
Granth Rakesh Thakkar India 151.8
record attempt, Dresden, 2014
Mishti Shah
India
161.3
Turkish Memoriad 2017
Naofumi Ogasawara Japan 171.1 Memoriad 2012
Shanshak Jain
India
171.5
Turkish Memoriad 2016
Naman Chandak
India
183.0
Turkish Memoriad 2018
Akshita Shailesh Shah India 186.9 Memoriad 2012
Sanika Ajabe
India
192.2
Turkish Memoriad 2018
Marc Jornet Sanz Spain 199 record attempt at the Mathematics Faculty of the University of Valencia
Aayush Panchal
India
200.7
Turkish Memoriad 2017
Ronaldo Domnik Fernandes
India
201.4
Turkish Memoriad 2018
Gunishka Jain
India
214.3
Memoriad 2016
Rohini Shiradkar
India
215.3
Turkish Memoriad 2018
Binderya Daimaa
Mongolia
220.6
Memoriad 2016
Burak Bilgin Turkey 221.8
Turkish Memoriad 2019
Alberto Coto Spain 222 Mental Calculation World Cup 2010
Kirtan Tejaram Sirvi India
223.3
Turkish Memoriad 2019
Kaushal Rahul Erande India
237.6
Turkish Memoriad 2019
Aybars Efe Topçu
Turkey
268.0
Turkish Memoriad 2018
Siddhi Jain
India
329.7
Memoriad 2016
Drashti Kapadia India 234.8 Memoriad 2012
Jiya Maniar
India
236.3
Memoriad 2016
Ramon Abella Villa Spain 242 record attempt, Impossibility Challenger Games in Dachau, 2009
Manav Maniyar
India
247.5
Turkish Memoriad 2017
Yash Kamal Kumar Jain
India
250.6
Memoriad 2016
Woon Chieng Wong Malaysia 253 Memoriad 2012
Ruchita Shirsath India
255.8
Turkish Memoriad 2019
Prathamesh Tupe
India
257.5
Turkish Memoriad 2017
Mayank Mukesh Jain India 268 Memoriad 2012
Prayan Piyush Mutha
India
267.8
Turkish Memoriad 2019
Jinash Vimesh Dedhia
India
272.2
Turkish Memoriad 2018
Mohit Nitin Gaikwad India 275 Memoriad 2012
Rhea Shah India
275
Mental Calculation World Cup 2014
Rathang Joshi
India
275.4
Turkish Memoriad 2018
Jorge Arturo Mendoza Huertas Peru 278 Mental Calculation World Cup 2008
Yash Dimal Desai India 280 Memoriad 2012
Chie Ishikawa Japan
280
Mental Calculation World Cup 2014
Priyanshi Somani India 283 Mental Calculation World Cup 2010
Aryan Hiten Savla
India
284.5
Turkish Memoriad 2018
Shourya Maheshwari India 286
Mental Calculation World Cup 2014
Durva Vinayak Mali
India
294.9
Turkish Memoriad 2018
Dila Bilen
Cyprus
302.8
Turkish Memoriad 2019
Megh Kashilkar
India
302.9
Turkish Memoriad 2017
Maria Lizeth Duarte Coronado Colombia
393.7
Turkish Memoriad 2019
Dhruv Shah
India
307.1
Memoriad 2016
Harshiv Shah
India
310.2
Memoriad 2016
Soumya Shivraj Patil
India
314.7
Turkish Memoriad 2019
Barış Ergün
Turkey
314.4
Memoriad 2016
Gunıshka Jain
India
321.1
Turkish Memoriad 2016
Riddhi Ganesh Pawar
India
324.8
Turkish Memoriad 2019
Salvador Bisshop Flores Spain 325 Mental Calculation World Cup 2008
Ömer Yiğit Aǧma Turkey
326
Turkish Memoriad 2014
Shourya Mohit Maheshwar India
326
Turkish Memoriad 2013
Hakan Gürbaşlar Turkey 332.6 Turkish Memoriad 2013
Can Atai Örken
Turkey
333.8
Memoriad 2016
Tina Bauer Germany 336 Memoriad 2012
Akansha Narendra Pawar
India
341.1
Turkish Memoriad 2019
Angıe Nıcolle Bernal Lesmes
Colombia
351.7
Turkish Memoriad 2019
Kotori Yamauchi Japan 354 Memoriad 2012
Ziana Chirag Popat
India
354.0
Turkish Memoriad 2019
Aysel Kerimova
Azerbaijan
370
Turkish Memoriad 2014
Maitri Maniar India 371
Mental Calculation World Cup 2014
Hamza Sefa Koç Turkey
373.3
Turkish Memoriad 2016
Servet Özkurt Turkey 378 Turkish Memoriad 2009
Hua Wei Chan Malaysia 379.5
Memoriad 2016
Tejaswini Gopal Bhandari
India
380.0
Turkish Memoriad 2019
Stephanie Chen
USA
382.1
Memoriad 2016
Atharv Singh Rathour
India
382.8
Turkish Memoriad 2018
Mayurika Vadhavan
India
404.4
Turkish Memoriad 2019
Robert Fountain Great Britain 405 Mental Calculation World Cup 2014
Furkan Albayrak
India
408.5
Turkish Memoriad 2017
Gerelt-od Dorjogotov Mongolia
410.0
Turkish Memoriad 2016
Samruddhi Shinde India
413.2
Turkish Memoriad 2019
Parashkumar Shah India 416 Memoriad 2012
Arsen Rakhymbekov
Kyrgyzstan
417.3
Turkish Memoriad 2017
Hamza Sefa Koç
Turkey
417.3
Turkish Memoriad 2017
Harsh Unmesh Kulkarni
India
419.4
Turkish Memoriad 2019
Ruhi Shailesh Jasani India
426.8
Turkish Memoriad 2019
Zahid Tahirov
Azerbaijan
427
Turkish Memoriad 2014
Tuğba Bostanci
Turkey
432.0
Turkish Memoriad 2019
Dev Patel
India
432.8
Turkish Memoriad 2017
Kənan Eyybov
Azerbaijan 443
Turkish Memoriad 2014
Himesh Kanaiyalal Katarmal
India
450.2
Turkish Memoriad 2018
Georgi Georgiev
Bulgaria
450.8
Memoriad 2016
Irmak Kurşun
Turkey
452
Turkish Memoriad 2013
 Hüseyin Soysaldi
Turkey 453
Turkish Memoriad 2015
Yeimy Valentina Ortiz Mesa
Colombia
453.6
Turkish Memoriad 2018
Fatma Ceren Arslan
Turkey
466
Turkish Memoriad 2015
Abdurrahman Cırık
Turkey
466.0
Memoriad 2016
Leif Carlsson Sweden 471 Memoriad 2012
Samet Berkay Bayraktar Turkey
472
Turkish Memoriad 2015
Melahat Karakiraz
Turkey
482
Turkish Memoriad 2013
Myagmarsuren Tuuruul Mongolia 488 Memoriad 2012
Seçkin Altinel Turkey 499 Turkish Memoriad 2011
Asya Aksungur Turkey
500.9
Turkish Memoriad 2016
Divesh Ramanlal Shah India 501 Memoriad 2008
Bat-Erdene Batsukh Mongolia
505.4
Memoriad 2016
Alain Bastian Luxembourg 513 Memoriad 2012
Miraç Sahra Kiliç
Turkey
522.6
Turkish Memoriad 2019
İlem Karaca
Turkey
523
Turkish Memoriad 2013
Disha Agarwal
India
523.1
Memoriad 2016
Rhea Sandeep Shah
India
550
Turkish Memoriad 2013
Anumeha Jain
India
554.2
Memoriad 2016
 Meryem Cemre Arslan
Turkey
556
Turkish Memoriad 2013
Saee Amit Nimdeo India
556.2
Turkish Memoriad 2019
Lukas Amsüss Austria 559 Memoriad 2012
Can Kayikci
Turkey
570
Turkish Memoriad 2014
Ceren Demir Turkey 580 Turkish Memoriad 2011
Dirk Ewers
Germany
582.7
Memoriad 2016
Parva Manesh Patel
India
594.7
Turkish Memoriad 2019

Multiplication

ten tasks for multiplying two 5-digit numbers

Marc Jornet Sanz Spain 59.4
record attempt at the school CEIP Padre Moreno in Moixent (Spain) 2019
Samuel Ruiz Morales Colombia
146.0
Turkish Memoriad 2019
Jan van Koningsveld Germany 186 record attempt at Berufsbildende Schule I in Emden (Germany), 2005

Multiplication

ten tasks for multiplying two 8-digit numbers

Marc Jornet Sanz Spain 162.3
record attempt at the school CEIP Padre Moreno in Moixent (Spain), 2019
Jeonghee Lee South Korea 182.9
Mental Calculation World Cup 2018
Freddis Reyes Hernández Cuba 210.6 record attempt, Kulturbunker Emden, 2015
Granth Rakesh Thakkar India 307
Mental Calculation World Cup 2014
Maitri Maniar
India
327.8
Memoriad 2016
Akshita Shailesh Shah India 358 Memoriad 2012
Aaryan Nitin Shukla
India
369.8
Turkish Memoriad 2018
Gunishka Jain
India
373.0
Memoriad 2016
Kevin Ritesh Shah
India
384.6
Turkish Memoriad 2019
Nisarg Sandeep Ghule
India
409.9
Turkish Memoriad 2019
Mishti Shah India
431.5
Turkish Memoriad 2017
Rhea Sandeep Shah India 439 Memoriad 2012
Mayank Mukesh Jain India 459 Memoriad 2012
Binderya Daimaa
Mongolia
476.7
Memoriad 2016
Arundhati Jaywant Patade India 492.9
Turkish Memoriad 2018
Dhruv Shah
India
497.9
Memoriad 2016
Alberto Coto Spain 505 Mental Calculation World Cup 2008
Rabiya Nur Çelik
Turkey
508
Turkish Memoriad 2014
Jiya Maniar
India
531.1
Memoriad 2016
Parva Manish Patel
India
534.3
Turkish Memoriad 2019
Jinash Vimesh Dedhia
India
541.0
Turkish Memoriad 2018
Riya Madhukar Shewale
India
575.5
Turkish Memoriad 2019
Priyanshi Somani India 588 Mental Calculation World Cup 2010
Disha Agarwal
India
594.8
Memoriad 2016
Prathamesh Tupe
India
624.0
Turkish Memoriad 2017
Leif Carlsson Sweden 609 Memoriad 2012
Samruddhi Shinde
India
632.9
Turkish Memoriad 2019
Jayadithya Avinash Shetty
India
720
Turkish Memoriad 2019
Alibek Tursunbekov
Kyrgyzstan
716.2
Turkish Memoriad 2018
Mohammed Seghir Saïd Algeria 780 record attempt, youth hostel Tizi-Ouzou, 2006
Jan van Koningsveld Germany 784 Memoriad 2008

Square Roots

ten tasks for extracting the root of a 6-digit numbers to an accuracy of 8 digits
Granth Rakesh Thakkar India
61.9
record attempt, Dresden, Germany, 2014
Rhea Sandeep Shah India
90.0
Turkish Memoriad 2013
Priyanshi Somani India 163 record attempt, Lourdes Covent School in Surat, India, 2012
Marc Jornet Sanz Spain
223.0
record attempt at the school CEIP Padre Moreno in Moixent (Spain), 2019
Mayank Mukesh Jain India 232 Memoriad 2012
Aaryan Nitin Shukla India
263.2
Turkish Memoriad 2018
Hakan Gürbaşlar Turkey 295 record attempt, Ankara, 2011
Georgi Georgiev
Bulgaria
327.5
Turkish Memoriad 2018
Selçuk Soner Akgül Turkey 379 record attempt, Ankara, 2010
Pascal Kaul Switzerland
474
Mental Calculation World Cup 2014
Robert Fountain Great Britain
516
Mental Calculation World Cup 2014
Açelia Özçelik
Turkey
544.8
Memoriad 2016
Adi Tamir Israel
539
Mental Calculation World Cup 2014
Maitri Bhanushali
India
552.9
Memoriad 2016
Harshi Bhavsar
India
665.8
Memoriad 2016
Alberto Coto Spain 666 Mental Calculation World Cup 2010
Harshiv Shah
India
755.6
Turkish Memoriad 2017
Nodas Boukovalas Greece 870 Memoriad 2012

Calendar

most days-of the week calculated in one minute for random dates from 1600-210
Yusnier Viera USA 140
record attempt at Miami Dade College, 2018
Jay Baldiya Jain
India
125
Memoriad 2016
Myagmarsuren Miigaa
Mongolia 110
Memoriad World Record Attempts Week, Beylikduzu, Istanbul, 2015
Jay Baldiya Jain
India
103
Turkish Memoriad 2016
Jinash Dedhia
India
97
Turkish Memoriad 2017
Jan van Koningsveld Germany 96
record attempt, Früchteburgschule Emden, 2015
Yusnier Viera
Cuba
(now USA)
93 record attempt, 2010
Jayadithya Avinash Shetty India
93
Turkish Memoriad 2019
Nodas Boukovalas Greece 92
record attempt at Hotel Primas, Wolfsburg, Germany, 2018
Aayush Panchal
India
89
Turkish Memoriad 2017
Jainam Nayankumar Shah
India
89
Memoriad 2016
Shashank Jain
India
86
Turkish Memoriad 2016
Myagmarsuren Tuuruul Mongolia 85 Memoriad 2012
Akshita Shailesh Shah India 81 Memoriad 2012
Tina Bauer Germany 78 Memoriad 2016
Aarian Nitin Shukla
India
76
Turkish Memoriad 2018
Granth Rakesh Thakkar India 75 Memoriad 2012
Rushank Vimal Jain
India
75
Turkish Memoriad 2018
Freddis Reyes Hernández Cuba 74 record attempt, 2010
Marc Jornet Sanz Spain 71
Mental Calculation World Cup 2018
Hakim Belouad Algeria 71
Turkish Memoriad 2019
Georgi Georgiev Bulgaria 69
Memoriad 2016
Gunishka Jain
India
68
Memoriad 2016
Manav Maniyar
India
66
Turkish Memoriad 2017
Chavi Jain
India
63
Turkish Memoriad 2016
Enkhluun Batkhishig
Mongolia
63
Memoriad 2016
Sanika Ajabe
India
62
Turkish Memoriad 2018
Binderya Daimaa
Mongolia
60
Memoriad 2016
Alain Bastian Luxembourg 59 Memoriad 2012
Daniel Timms Great Britain 59
Mental Calculation World Cup 2018
Aryan Hiten Savla
India
57
Turkish Memoriad 2018
Binderiya Bold Mongolia
55
Turkish Memoriad 2016
Neel Savla
India
55
Turkish Memoriad 2017
Ayush Mukesh Jain India 56 Memoriad 2012
Johannes Zhou Germany 54 Memoriad 2012
Megh Kashilkar
India
54
Turkish Memoriad 2017
Om Dhumal
India
54
Turkish Memoriad 2017
Samruddhi Shinde
India
54
Turkish Memoriad 2019
Nisarg Ghule India 52
Turkish Memoriad 2019
Yash Kamal Kumar Jain
India
49
Turkish Memoriad 2016
Maitri Bhanushali India
49
Memoriad 2016
Jasper Visser Netherlands 48
Memoriad 2016 
Anshuman Das
India
48
Turkish Memoriad 2019
Robin Wersig Germany 47 Mental Calculation World Cup 2010
Yash Dimal Desai India 47 Memoriad 2012
Jeonghee Lee South Korea 47
Mental Calculation World Cup 2018
Khatanbaatar Khandsuren Mongolia 46 Memoriad 2012
Kirtan Tejaram Sirvi
India
46
Turkish Memoriad 2019
Matthias Kesselschläger Germany 45 record attempt, 2005
Burak Bilgin Turkey
44
Turkish Memoriad 2019
Aarit Amitkumar Mehta
India
43
Turkish Memoriad 2019
Shaurya Chetan Bagrecha
India
43
Turkish Memoriad 2019
Rhea Sandeep India 42 Memoriad 2012
Jiya Maniar India
42
Memoriad 2016
Sachit Bharatkumar Patel
India
42
Turkish Memoriad 2018
Dhyana Patel
India
41
Memoriad 2016
Tania Vira
India
41
Turkish Memoriad 2017
Prathamesh Tupe
India
40
Turkish Memoriad 2017
Mishti Shah
India
40
Turkish Memoriad 2017
Avantika Rohan Kambli
India
40
Turkish Memoriad 2018
Durva Vinayak Mali
India
40
Turkish Memoriad 2018
Ronaldo Fernandes
India
39
Turkish Memoriad 2017
Juan Pablo Duque
Colombia
38
Memoriad 2016
Robert Fountain Great Britain 38
Memoriad 2016
Disha Agarwal India
38
Memoriad 2016
Mohammad El Mir
Lebanon
38
Mental Calculation World Cup 2018
Rohit Pawar
India
38
Turkish Memoriad 2018
Ronak Vinod Bothara
India
38
Turkish Memoriad 2019
Mayank Mukesh Jain India 37 Memoriad 2012
Khangal Battur Mongolia
37
Memoriad 2016
Soumya Haria
India
37
Turkish Memoriad 2017
Himesh Kanaiyalal Katarmal India
37
Turkish Memoriad 2018
Vedant Sanjay Randive
India
37
Turkish Memoriad 2019
Alberto Rodríguez Alonso Spain 36
Mental Calculation World Cup 2018
Priyanshi Somani India 36 Mental Calculation World Cup 2010
Dhruv Shah India
36
Memoriad 2016
Maitri Maniar India
36
Memoriad 2016
Henıl Pranavbhai Bhavsar
India
36
Memoriad 2016
Bat-Erdene Batsukh Mongolia 36
Memoriad 2016
Ryan James King
Australia
36
Memoriad 2016
Swaraj Desai
India
36
Turkish Memoriad 2017
Janya Mali
India
36
Turkish Memoriad 2017
Alexander Drygalla Germany 36
Mental Calculation World Cup 2018
Dhruv Nitin Panchal
India
36
Turkish Memoriad 2018
Erich Prem Austria
35
Mental Calculation World Cup 2014
Açelya Özçelik Turkey
34
Turkish Memoriad 2015
Manav Shah
India
34
Turkish Memoriad 2018
Lahcen Oulhadj
Morocco
34
Turkish Memoriad 2018
Alberto Coto Spain 33 Mental Calculation World Cup 2010
Rüdiger Gamm Germany 33 Mental Calculation World Cup 2008
Georgi Dimitrov Bulgaria 33 Memoriad 2012
Doğan Ömerbaş Turkey 32 Turkish Memoriad 2011
Atanas Atanasov Bulgaria 32 Turkish Memoriad 2019
Prayaan Chirag Parekh
India
32
Turkish Memoriad 2019
Ariunzaya Baatar
Mongolia
31
Turkish Memoriad 2015
Ruhi Shailesh Jasani
India
31
Turkish Memoriad 2019
Irmuunyurtunts Ariunbayar
Mongolia
30
Turkish Memoriad 2016
Harshi Bhavsar
India
30
Memoriad 2016
Açelya Özçelik Turkey
30
Turkish Memoriad 2017
Wilson José Duarte Espita
Colombia
30
Turkish Memoriad 2019
Selçuk Soner Akgül Turkey 29 Turkish Memoriad 2009
Mohit Nitin Gaikwad India 29 Memoriad 2012
Çiğdem Çalik Turkey 29 Turkish Memoriad 2011
Tomohiro Iseda
Japan
29
Mental Calculation World Cup 2018
Osako Takuma
Japan
29
Mental Calculation World Cup 2018
Jiya Dipeshkumar Jain
India
29
Turkish Memoriad 2018
Parth Paras Mehta
India

Turkish Memoriad 2019
Alberto Rodríguez Alonso Spain
28
Mental Calculation World Cup 2014
Bedirhan Ayyildiz
Turkey
28
Turkish Memoriad 2015
Parashkumar Shah India 27 Mental Calculation World Cup 2012
Silke Betten
Germany
27
Mental Calculation World Cup 2014
Prem Akshay Mutha
India
27
Turkish Memoriad 2019
Kevin Viral Shah
India
27
Turkish Memoriad 2019
Alberto Rodríguez Spain 26 Mental Calculation World Cup 2012
Ganbayar Bat-Ulzii Mongolia 26 Memoriad 2012
Ceren Demir Turkey 26 Turkish Memoriad 2011
Urnukh Tsend-Ayush
Mongolia
26
Turkish Memoriad 2016
Harshiv Shah
India
26
Turkish Memoriad 2017
Netra Nikesh Dedhia
India
26
Turkish Memoriad 2019
Soumya Shivraj Patil
India
26
Turkish Memoriad 2019
John Louis India 25 Memoriad 2008
Henni Walid Algeria
25
Turkish Memoriad 2018
Rushi Gande
India
25
Turkish Memoriad 2019
Servet Özkurt Turkey 24 Memoriad 2008
Mehmet Emre Güngör Turkey
24
Turkish Memoriad 2013
Dhruv Shah India
24
Mental Calculation World Cup 2014
Gülsu Güldoğan Turkey
24
Turkish Memoriad 2015
Smit Patel
India
24
Turkish Memoriad 2017
Dirk Ewers Germany 24
Mental Calculation World Cup 2018
Swapnil Shinde
India
24
Turkish Memoriad 2018
Ruchita Shirsath
India
24
Turkish Memoriad 2019
Gerelt-od Dorjogotov Mongolia
23
Turkish Memoriad 2016
Samuel Ruiz Morales
Colombia
23
Turkish Memoriad 2019
Kaushal Rahul Erande
India
23
Turkish Memoriad 2019
Stephan Gruber Germany 22 record attempt, 2002
Pascal Kaul Switzerland
22
Mental Calculation World Cup 2014
Path Patel
India
22
Turkish Memoriad 2017
Hiroto Ihara
Japan
21
Mental Calculation World Cup 2018
Hakan Gürbaşar Turkey 20 Turkish Memoriad 2011
Gert Mittring Germany 20 record attempt, 1999
Tank Tali Turkey 20 Memoriad 2008
Hasmukh Nakum
India
20
Memoriad 2016
Yash Mali
India
20
Turkish Memoriad 2017
Atharv Singh Rathour India
20
Turkish Memoriad 2018
Mayurika Vadhavan
India
20
Turkish Memoriad 2019
Cemre Su Yağci
Turkey
19
Turkish Memoriad 2013
Daniel Timms Great Britain 18 Mental Calculation World Cup 2012
Adi Tamir Israel
18
Mental Calculation World Cup 2014
Alara Kaya
Turkey
18
Turkish Memoriad 2015
Siddhi Jain
India
18
Turkish Memoriad 2016
Kutay Taşçi
Turkey
17
Turkish Memoriad 2013
Martin Drees
Germany
17
Mental Calculation World Cup 2018
Bjoern Gumboldt
Germany
17
Mental Calculation World Cup 2010
Tejaswini Gopal Bhandari
India
17
Turkish Memoriad 2019
Leif Carlsson Sweden 16 Memoriad 2012
Dev Patel
India
16
Turkish Memoriad 2017
Sreenidhi Neermanvani
India
16
Mental Calculation World Cup 2018
Maitri Patel India 15 Mental Calculation World Cup 2010
Ramiro Francisco Moyano Rami
Argentinia
15
Turkish Memoriad 2017
Nandini Garg
India
15
Mental Calculation World Cup 2018
Maria Lizeth Duarte Coronado
Colombia
15
Turkish Memoriad 2019
Ralf Laue Germany 14 Guinness TV Show, 1999
Shourya Maheshwari India
14
Mental Calculation World Cup 2014
Chris Jacob
India
14
Memoriad 2016
Gerelt-od Dorjogotov Mongolia
14
Memoriad 2016
Aaryan Gupta
India
14
Mental Calculation World Cup 2018
Ronaldo Domnik Fernandes India
14
Turkish Memoriad 2018
Saee Amit Nimdeo
India
14
Turkish Memoriad 2019
Christopher T. Beeg Germany 13 Memoriad 2012
Hari Prasad India 13 record attempt, 1999
Arun Mangal India 13 Memoriad 2008
Seçkin Altinel Turkey 13 Turkish Memoriad 2011
Rabiya Nur Çelik
Turkey
13
Turkish Memoriad 2014
Ali Burak Köklü
Turkey
13
Turkish Memoriad 2014
David Cantor Medina
Colombia
13
Memoriad 2016
Ayşenur Aslan
Turkey
13
Turkish Memoriad 2017
Hetansh
India
13
Mental Calculation World Cup 2018
Jinal Prashant Thakkar
India
13
Turkish Memoriad 2019
Valentin Barraud France 12 Mental Calculation World Cup 2010
Umut Berk Yüsek
Turkey
12
Turkish Memoriad 2014
Tetsuya Ono Japan
12
Mental Calculation World Cup 2016
Hriday Dedhia
India
12
Turkish Memoriad 2017
Andreas Berger Germany 12
Mental Calculation World Cup 2018
Andrew Robertshaw Great Britain 12
Mental Calculation World Cup 2018
Martín Nicolás Rozó Cañon
Colombia
12
Turkish Memoriad 2019
Issam Khneisser Lebanon 11 Mental Calculation World Cup 2008
Melahat Karakiraz Turkey
11
Turkish Memoriad 2014
Aleyna Çetin
Turkey 11
Turkish Memoriad 2014
Abdurrahman Cirik
Turkey
11
Turkish Memoriad 2017
Wenzel Grüß
Germany
11
Mental Calculation World Cup 2018
Angel Goutam  Choudhury
India
11
Turkish Memoriad 2019
Bhavani Konduru India 10 Mental Calculation World Cup 2012
Pedro Correa Gea Spain 10 Mental Calculation World Cup 2010
Francisco Javier Mañana Rodriguez Spain 10 Mental Calculation World Cup 2008
Anar Binderiya Mongolia 10 Memoriad 2012
Zeynep Gamze Topay Turkey
10
Turkish Memoriad 2013
Priyanshul Chauriya India
10
Mental Calculation World Cup 2014
Maitri Maniar India
10
Mental Calculation World Cup 2014
Ayşe Ceylan
Turkey
10
Turkish Memoriad 2014
Merve Tok
Turkey
10
Turkish Memoriad 2014
Yuki Kimura Japan
10
Mental Calculation World Cup 2016
Rohini Shiradkar India
10
Turkish Memoriad 2018
Dhairya Kartik Shah
India
10
Turkish Memoriad 2018
Haard Bharatkumar Mori
India
10
Turkish Memoriad 2019

Mental Calculation: Division

Ten tasks for dividing a 10-digit number by a 5-digit number (no remainders left)

Jeonghee Lee South Korea
53.2
record attempt, Hotel Primas, Wolfsburg, 2018
Marc Jornet Sanz Spain
93.1
record attempt at the school CEIP Padre Moreno in Moixent (Spain), 2019
Jayadithya Avinash Shetty India
97.0
Turkish Memoriad 2019
Georgi Georgiev Bulgaria 136.2
Turkish Memoriad 2018
Hakan Gürbaşlar Turkey
138.6
record attempt at the Memoriad World Record Attempts Week, Beylikduzu, Istanbul
Aaryan Nitin Shukla India
177.7
Turkish Memoriad 2018
Stephanie Chen
USA
191.3
Memoriad 2016
Sanika Ajabe
India
199.7
Turkish Memoriad 2018
Hua Wei Chan
Malaysia
206.3
Memoriad 2016
Kaushal Rahul Erande India
211.1
Turkish Memoriad 2019
Hakan Gürbaşlar Turkey
224.1
Turkish Memoriad 2018
Manav Shah
India
251.5
Turkish Memoriad 2018
Shashank Jain
India
315.3
Turkish Memoriad 2016
Atharv Singh Rathour India
317.6
Turkish Memoriad 2018
Tina Bauer
Germany
331.4
Memoriad 2016
Amit Garg
India
345
record attempt at Baybridge Decision Technologies in Annapolis (USA), 2012
Gunishka Jain
India
360.0
Memoriad 2016
Willem Bouman
Netherlands
367
record attempt in Eindhoven (Netherlands), 2011

Mental Calculation: Factorizing Numbers

The factors of 20 random five-digit numbers (which are not prime numbers) have to be found

Wenzel Grüß
Germany
6:38 minutes
record attempt at the Mental Calculation World Cup 2016
Willem Bouman
Netherlands
13:39 minutes
record attempt in Delft (Netherlands), 2010

Other Remarkable Achievements



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