Online Interactive Odds helper?

I read Phil Gordons Little Green book a few weeks ago, and he offers a webpage where he posts problems with odds and implied odds, but it gives me "not found" in my browser. (and couldnt find it on his new HP either.) And it got me to wondering if there are any websites where you can approach problems of any kind, or have to figure odds like in a real situation, or answer questions to check your knowledge or just anything of this kind.?.

Not sure if this is exactly what you're looking for but it will give you some info if you plot in different hands as far as your odds. http://www.cardplayer.com/poker-tools/odds-calculator/texas-holdem

Otherwise I would say to google part of Phil's link, I'm sure it's backed up somewhere.