Divide the 12 balls into 4 groups of 3's. / v) Z( D: J$ |2 z0 G2 s eWeigh group 1 & 23 x! b1 k, @4 V$ a0 x
then weigh group 2 & 3 # _6 J8 \' G4 n2 w eIf the results are Equal & Equal, it means the ball with the different weight is in group 4. % `" j9 O1 p$ U$ KIf the results are Equal & Unequal, it means the ball is in group 3. 0 ? z# k& x! \/ r9 a公仔箱論壇If the results are Unequal & Equal, it means the ball is in group 1. . `# |, Q' \; `- D1 J: Z! x- @2 cTVBNOW 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。If the results are Unequal & Unequal, it means the ball is in group 2.公仔箱論壇+ `) l) Q2 H$ ^$ w( r
2 l1 ^" W9 a2 e2 W公仔箱論壇Once you determine the group that contains the ball. r R' H$ l# r" f2 b8 MSimply weigh two of the balls