i've got an uncle who's a maths professor who can do some frankly freaky shit with numbers and/or memory. he's memorised the first few thousand digits of pi (by reading it once

) , that kinda stuff. can multiply big numbers together, do square roots to a few decimal places (must be quite hard i think!)...
he happened to be over when i doing my A-levels and he tried to help me with my maths revision; i've rarely felt so retarded.