Jan Van Koningsveld is a Mental Calculation
World Cups Champion. His mental calculation
skills, especially his mental calendars
& mental square roots genius, made him
the World Mental Calculation Champion
several times. His extraordinary mental
calculation skills made him a world
celebrity. He is one of the celebrities
who participates to Memoriad - World
Memory Olympiad (World Mental Calculation,
Memory & Photographic Speed Reading
Competitions) from Germany.
