| You should also watch “Amazing Fully Mechanical Pocket Calculator” |
Rüdiger Gamm is a German “mental calculator”. He attained his ability to calculate (memorize most of the time) complex mathematics in his head at the age of 21. As well, he can also speak backwards in complete sentences, and calculate calendars.
Part 2: http://www.youtube.com/watch?v=oqxhxIuEGRw
Part 2: http://www.youtube.com/watch?v=oqxhxIuEGRw


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this guy is like my opposite. I can't even speak or type without a calculator to tell me what to do next.
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