sitsky

take 4 balls as a group, 3 groups - A B C$ m0 k; S8 f( S) B9 Q
weigh A & B (ex. B heavier)
+ ^6 h. |! q. R: \% i: M6 |then weigh B & C (B & C same weight)
3 _6 w' c6 m  e( M) G7 Bto find which group has the weight difference and find out is it (A is lighter)
0 f9 U/ R3 e4 q" N8 ]; [( N& Hheavier or lighter
: {! \  z2 `8 S; z7 S; V2 xtvb now,tvbnow,bttvbthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
% j' \) o+ N7 D5 Q0 L. m5.39.217.77:8898measure E vs F to find which 1 is lighter....