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huh?? How tough is it?
) X/ \# I' K4 {$ e5.39.217.761/. break it down to 2 section, 6 balls on each side. Put which every section shows lighter awaytvb now,tvbnow,bttvb9 o5 s1 O, g; f2 E5 F& S1 b  e

$ \  X) i/ ^: D' x+ m2/. Break the more heavy section in to 2 sections again, which is 3 balls on each side. Keep the more heavy side again.
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# m' K' S$ u) ^1 ~$ ^4 _3/. Pick 2 balls and put them on each side from the remaing 3 balls. If they are equal weight, the ball on the table is the more heavy one, if one side is more heavy than the other, that will be the more heavy one.
# K: |7 r  e- N5.39.217.76
# F7 c! u0 g* O7 a3 F3 R" G4 E5.39.217.76Easy. Tough question? For whom? I did it in 1 minute.