It's still a tough one though, especially if you think in the same integer base. It kicked my butt for a long time.
It is tough - I have a very odd mind, especially when you consider I gave up maths at 16 (hooray for the UK and our wonderfully rounded educations!)
Right, this one's kind of old...yes/no questions only.
Two dead men in a locked room. A finished game of chess on a table and a gun from which one bullet has been fired. What happened?