Divide the 12 balls into 4 groups of 3's. * ~1 j% w; P# F( \9 Jtvboxnow.comWeigh group 1 & 2 - D* D3 p3 T/ B# |0 |. T M+ ^tvboxnow.comthen weigh group 2 & 3. G$ x& s- T/ O3 H4 W
If the results are Equal & Equal, it means the ball with the different weight is in group 4.公仔箱論壇 R" j# r4 [! N# Z5 y0 G3 a. B% E# J1 K
If the results are Equal & Unequal, it means the ball is in group 3. & H4 q: u* m, t- Y* t7 E5 x( s- v& Vtvboxnow.comIf the results are Unequal & Equal, it means the ball is in group 1. ( }9 `1 I8 {% n5 H) k公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2.! }) r5 d, ^, w: N$ q
_0 D! e+ R7 _/ utvboxnow.comOnce you determine the group that contains the ball. ' s. B/ R- s5 F4 N) R8 etvb now,tvbnow,bttvbSimply weigh two of the balls