take 4 balls as a group, 3 groups - A B C
9 [; n# a& M7 oweigh A & B (ex. B heavier)$ H9 N- t# N" ? w; |3 `% N
then weigh B & C (B & C same weight)os.tvboxnow.com4 @* j, b( q2 E' F: G! J
to find which group has the weight difference and find out is it (A is lighter)os.tvboxnow.com3 l* Z/ k" x+ @+ d
heavier or lighter
( M n4 K0 ^" v1 V* O) R) ^+ jtvb now,tvbnow,bttvbthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)6 K6 e2 L3 y- H; z. _9 G9 j
measure E vs F to find which 1 is lighter.... |