In terms of mental calculations, Rüdiger's most notable talent is the ability to memorize large powers.
In the 2008 Mental Calculation World Cup in Leipzig, he recited 81100, which took approximately 2 minutes and 30 seconds.
"[2] Gamm recalls, shortly after leaving college, listening to the radio and calculating alongside a champion mathematician.
After Gamm answered the calculations faster than the champion, he started training his brain into the field of mental math and, a year later, appeared on the German TV game show Wetten, dass..?
Gamm won the show with the highest score achieved and received a prize of 8,400 Deutsche Marks.