Divide the 12 balls into 4 groups of 3's.5.39.217.77:88982 u$ ~4 D% s" G3 K# \6 p, h
Weigh group 1 & 2 ! U( r, x( i$ lthen weigh group 2 & 3 ! \- {; D; ?9 q0 _' j$ Y5.39.217.77:8898If the results are Equal & Equal, it means the ball with the different weight is in group 4.- f- S7 |8 }% B7 L% N
If the results are Equal & Unequal, it means the ball is in group 3. 8 w0 g7 g3 m; ]8 }5 B9 K8 m9 x. zTVBNOW 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 & Equal, it means the ball is in group 1. % ~$ a# Z' T9 L& j* O公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2.! C4 a# B6 q. a1 k6 j$ y9 C
. U5 F6 p. s- [. R) K6 f- ~$ ~/ h( p5.39.217.77:8898Once you determine the group that contains the ball. ( c9 T# U$ {: Q6 c3 u5.39.217.77:8898Simply weigh two of the balls