Divide the 12 balls into 4 groups of 3's.公仔箱論壇1 D5 c6 o0 z2 e; p
Weigh group 1 & 2公仔箱論壇; o9 Y/ Y% G7 h" b6 c9 C
then weigh group 2 & 3 $ D p! X1 c) T% g9 L; \* W% Qtvb now,tvbnow,bttvbIf the results are Equal & Equal, it means the ball with the different weight is in group 4. 9 {5 `8 f' T, C1 t" A' K: I5.39.217.76If the results are Equal & Unequal, it means the ball is in group 3.公仔箱論壇0 j2 U6 J6 G' `. u$ w0 u" S
If the results are Unequal & Equal, it means the ball is in group 1.6 U W1 D" h U: p- ]( _
If the results are Unequal & Unequal, it means the ball is in group 2. 0 H4 h! g! H5 w E# f, p, Z# N }+ ?5.39.217.76 % i. W Q6 E U* p0 D! c5 C5.39.217.76Once you determine the group that contains the ball. / U& N1 s2 I4 i7 N1 |5.39.217.76Simply weigh two of the balls