the right word you search for is: Polymath/Polyhistor
http://en.wikipedia.org/wiki/Polymath
You can say it like this: I'm a Polymath
I'm unhappy no one answer this to you back in 2010 :-(
I guess just saying 'good at general knowledge' with a pretty bullet would be a little dumb. Anyway I can fancy it up a bit?
the right word you search for is: Polymath/Polyhistor
http://en.wikipedia.org/wiki/Polymath
You can say it like this: I'm a Polymath
I'm unhappy no one answer this to you back in 2010 :-(