Divide the 12 balls into 4 groups of 3's. & p* r) p' h' D5 r9 d- mtvb now,tvbnow,bttvbWeigh group 1 & 2tvb now,tvbnow,bttvb5 w; ]* l% D9 y! M( s
then weigh group 2 & 3 : P5 `9 G. ]$ ~9 h& ^# B) ^公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4." ]; ?8 g& ~. K9 `3 N* ^" T+ @
If the results are Equal & Unequal, it means the ball is in group 3. 6 c7 F5 g* E9 U6 M f, p公仔箱論壇If the results are Unequal & Equal, it means the ball is in group 1. 8 P* I2 y4 _0 C N0 v* F& Z3 t6 OIf the results are Unequal & Unequal, it means the ball is in group 2. - Q1 _5 [3 H \8 _- Q 5 M% c: g* R j) p) ^Once you determine the group that contains the ball. ! G' R0 E7 \' x* g5 s+ J l0 USimply weigh two of the balls