Divide the 12 balls into 4 groups of 3's.8 Z3 [5 O+ x8 M& u) k: b' L
Weigh group 1 & 2 7 X# `% S ^8 }$ f$ t公仔箱論壇then weigh group 2 & 3公仔箱論壇: M! o- {) Z Q* Z$ }2 [! u) _
If the results are Equal & Equal, it means the ball with the different weight is in group 4. + ~9 O& N6 s8 Atvboxnow.comIf the results are Equal & Unequal, it means the ball is in group 3. 4 ^+ k* j$ @8 O$ `2 z- b' N公仔箱論壇If the results are Unequal & Equal, it means the ball is in group 1.tvb now,tvbnow,bttvb8 P4 I$ A! E O- ?3 I! `' n0 Z
If the results are Unequal & Unequal, it means the ball is in group 2. 1 N& [1 ^! a# O7 }公仔箱論壇9 p$ _' h$ C6 h3 Y; m
Once you determine the group that contains the ball." g' g* ?# S9 L2 a+ q
Simply weigh two of the balls