Divide the 12 balls into 4 groups of 3's. 9 N; Y; y- E% {Weigh group 1 & 2& \+ S5 n. |" S& p2 J7 F
then weigh group 2 & 31 w" D' ~$ P( H- Q
If the results are Equal & Equal, it means the ball with the different weight is in group 4. # {6 g4 L9 o b' [tvb now,tvbnow,bttvbIf the results are Equal & Unequal, it means the ball is in group 3.公仔箱論壇1 i/ q4 d6 w# h) w/ L
If the results are Unequal & Equal, it means the ball is in group 1.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。+ v' O0 M: u) l! S$ w+ s& ~) f+ A0 `
If the results are Unequal & Unequal, it means the ball is in group 2. / X# a$ y/ E5 X/ F. z9 c+ t$ ] X" @; V' g3 f+ V
Once you determine the group that contains the ball. 8 J& F9 ^5 B! V$ b$ F! z: USimply weigh two of the balls