Divide the 12 balls into 4 groups of 3's.% n7 ?/ S4 m" ^, z
Weigh group 1 & 2 * {! c! F5 r) |- Q( p8 _2 h# `; Wtvb now,tvbnow,bttvbthen weigh group 2 & 3- q3 G* k0 ?. F4 v- v& W- v& W. R
If the results are Equal & Equal, it means the ball with the different weight is in group 4.公仔箱論壇! _8 R* R. v& u0 t# B6 G. L
If the results are Equal & Unequal, it means the ball is in group 3. ; c" {9 K K& x. a. EIf the results are Unequal & Equal, it means the ball is in group 1. ' L- N; ]: d9 @9 l/ Y公仔箱論壇If the results are Unequal & Unequal, it means the ball is in group 2. 8 `5 x2 j4 ~8 {7 T+ f( ~! T1 f5.39.217.775.39.217.77, m- F* e2 W! S$ n' C( q2 ]5 w. e
Once you determine the group that contains the ball.2 Y5 `: \: m6 B* z B! P6 K# \
Simply weigh two of the balls