The 14-year-old schoolboy Tomohiro Iseda from Japan is world champion mental arithmetic. He won 39 competitors in the German city of Wolfsburg, where the competition was held.
According to Martina Flamme-Jasper of the scientific museum Phaeno, that reported the incident, the youngest participant was a 12-year-old Japanese schoolboy, the oldest a 74-year-old retired from France. Chief Referee Ralf Laue, professor of computer science from Saxon Zwickau, organizes the World Championship every two years.
The disciplines include calculating the square root from numbers of six digits and also multiplications which is compulsory as part of the World Cup mental calculation, such as: 14,130,214 x 17,981,822 or 57,809,355 + 28 x 16,448,333.