Divide the 12 balls into 4 groups of 3's.
* [' h# E: D1 X+ Atvb now,tvbnow,bttvbWeigh group 1 & 2
3 X O7 P" G2 x7 _, R" P) I5.39.217.77:8898then weigh group 2 & 3tvb now,tvbnow,bttvb6 p! b8 J( S$ e( k) m
If the results are Equal & Equal, it means the ball with the different weight is in group 4.公仔箱論壇5 J; l. F# t: i
If the results are Equal & Unequal, it means the ball is in group 3.tvb now,tvbnow,bttvb; ^$ A( t. x& v& A) Z2 y# b8 D
If the results are Unequal & Equal, it means the ball is in group 1. V6 ^" }/ Z$ Y( Q, w7 L* j/ d! l8 k
If the results are Unequal & Unequal, it means the ball is in group 2.tvb now,tvbnow,bttvb9 X& b9 e' `# h g( `+ O0 J7 a
: A* y) J* R* e% V; b0 M7 [ L公仔箱論壇Once you determine the group that contains the ball.
6 ~9 B0 o+ p2 v" H' t公仔箱論壇Simply weigh two of the balls |