Divide the 12 balls into 4 groups of 3's. * a8 V7 _# z5 z" FWeigh group 1 & 2公仔箱論壇& J+ B& v5 T9 f5 L: a+ y
then weigh group 2 & 3 2 Y' ^& ]) Z+ lIf the results are Equal & Equal, it means the ball with the different weight is in group 4., M; G- d! A8 c7 v" j
If the results are Equal & Unequal, it means the ball is in group 3. / i! \; p1 {* B1 \& b5.39.217.76If the results are Unequal & Equal, it means the ball is in group 1. , }' N$ Q( X; V0 z* p) h9 O公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2. ; D3 t7 C; \- H9 r) m6 M2 k公仔箱論壇 8 K+ L; E8 k2 Xtvb now,tvbnow,bttvbOnce you determine the group that contains the ball.) P. q8 K# v4 ?( x4 |
Simply weigh two of the balls