You get one ball from each bag.
1. Balls from bag 1 to 5 go to the left arm of the scale, 6 to 10 to the right. (lets assume that 1 to 5 is lighter than 6 to 10).
2. Ball 1 and 2 goes to the left, 3 and 4 goes to the right. If equal then ball 5 is the solution. (If not then lets assume that ball 1 & 2 is lighter)
3. Ball 1 to the left ball 2 to the right. Lighter is the solution.
Three Hands #19 - Istanbul - Year End Championships
Newsflash: Buitenzorg has secured 2013 Year End #1
As we enter Istanbul, Buitenzorg leads tina110 by ~659 points and has safely secured the Year End #1 because there are no perfect hands awarded for round robin matches (so it's impossible to get that many points). Therefore, Buitenzorg is officially off the radar and will claim the remaining weeks as #1
Abiding by one's principle is very important. One should also learn how to apologize and acknowledge a mistake.