Mental Calculation World Cup - Mental Calculation World Cup 2012

Mental Calculation World Cup 2012

The Mental Calculation World Cup 2012 was held from 30/9/2012 to 01/10/2012 in the Mathematikum museum in Gießen, Germany. 32 Calculators from 16 countries participated. The World Cup involved the following 5 main contests :

  • Adding ten 10-digit numbers, 10 tasks in 7 minutes
    • Winner: Naofumi Ogasawara (Japan); 10 correct results in 191 seconds, world record
  • Multiplying two 8-digit numbers, 10 tasks in 10 minutes
    • Winner: Freddis Reyes Hernández (Cuba), 10 correct results in 361 seconds
  • Calendar Calculations, One minute, random dates from the years 1600–2100
    • Winner: Myagmarsuren Tuuruul (Mongolia), 57 correct results, world cup record
  • Square Roots from 6-digit numbers, 10 tasks in 10 minutes
    • Winner: Naofumi Ogasawara (Japan), 8 correct results (each solved, up to all the first 8 digits: 3 integers and 5 decimals)
  • Cube Roots from 6-digit numbers, 10 tasks in 15 minutes
    • Winner: Jan van Koningsveld (Germany), 50/80
  • Most Versatile Calculator (the best score for solving another 5 unknown "surprise tasks")
    • Winner: Naofumi Ogasawara (Japan), 500, perfect score.
  • Memoriad Trophy winner (score from the first 4 main contests) ,
    • Winner: Freddis Reyes Hernández (Cuba), 263.74 / 400

Naofumi Ogasawara (Japan) won the title in the overall competition (combination of all 10 categories). Hua Wei Chan (Malaysia) was 2nd overall, and Jan van Koningsveld was 3rd.

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