Divide the 12 balls into 4 groups of 3's.公仔箱論壇; i% e: Z( H/ s$ K6 ]6 S9 _4 Q
Weigh group 1 & 2& s( u7 k7 ^/ W; G5 Z! O3 Z' k: X; {
then weigh group 2 & 39 E# |, ]. y# U5 T. b
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
, S" U A- [0 d* jIf the results are Equal & Unequal, it means the ball is in group 3.5.39.217.77; x% H a6 Z+ k9 F: t/ k* J
If the results are Unequal & Equal, it means the ball is in group 1.
! a6 C' r5 O" @4 eIf the results are Unequal & Unequal, it means the ball is in group 2.tvb now,tvbnow,bttvb+ x5 [& A M: }! e5 u
8 J3 @0 p( R4 u y. l, v: f& K5.39.217.77Once you determine the group that contains the ball.
, Z& p) K6 S4 m4 _5.39.217.77Simply weigh two of the balls |