Divide the 12 balls into 4 groups of 3's.! U6 F7 n, ^6 g& g& X5 d, R' J: W
Weigh group 1 & 2
4 I- K9 R9 ?$ l. U# Ethen weigh group 2 & 35.39.217.76: v' V) t3 T* k3 i+ v+ d
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
+ O( a' T% Q9 R: Jtvb now,tvbnow,bttvbIf the results are Equal & Unequal, it means the ball is in group 3.
. [% g) u' O. kIf the results are Unequal & Equal, it means the ball is in group 1.
! B5 Y8 ?+ U( i) Y% [1 ctvb now,tvbnow,bttvbIf the results are Unequal & Unequal, it means the ball is in group 2.
( {# x7 f$ \5 G6 m; I# f4 [* Jtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb4 _' u2 t$ N! d6 w
Once you determine the group that contains the ball.
" ?: Q: w1 i! C! H公仔箱論壇Simply weigh two of the balls |