Divide the 12 balls into 4 groups of 3's.
( i( S$ h" F: F3 z6 KWeigh group 1 & 2
& F3 h# f! n, [, H/ S- x5 bthen weigh group 2 & 3公仔箱論壇: S# [/ J9 F. l1 Y2 [5 t
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
# x" e( B! w! T' @# e3 W* B) Qtvb now,tvbnow,bttvbIf the results are Equal & Unequal, it means the ball is in group 3.
/ Y6 q Y/ E$ H: u4 V6 q$ p! V5.39.217.77If the results are Unequal & Equal, it means the ball is in group 1.3 ~+ l: b0 d6 V2 q1 e% U. u5 e
If the results are Unequal & Unequal, it means the ball is in group 2.
2 a+ w9 P0 ?1 e' D% V. }" M公仔箱論壇
7 U) J; Z( c# l; I' B! r: J% b# J" s5.39.217.77Once you determine the group that contains the ball.tvb now,tvbnow,bttvb3 Z1 T& [$ E/ o! v2 o4 w
Simply weigh two of the balls |