klleung72781

Divide the 12 balls into 4 groups of 3's.
4 l1 c+ v9 }7 `) ~, ~公仔箱論壇Weigh group 1 & 2tvb now,tvbnow,bttvb2 Y/ {) a2 \2 ^" O. g
then weigh group 2 & 32 F- F' i  H. k
If the results are Equal & Equal, it means the ball with the different weight is in group 4.tvb now,tvbnow,bttvb$ [4 E" @- C3 X, e) O7 B  F
If the results are Equal & Unequal, it means the ball is in group 3.
" \& f8 Q5 @" }( S4 h% F# wIf the results are Unequal & Equal, it means the ball is in group 1.% M4 M) g( b/ l$ ]7 k% Y
If the results are Unequal & Unequal, it means the ball is in group 2.* I# A- v8 j+ Q, K, s$ L4 {, A) C
公仔箱論壇6 n3 ^& i5 F" G: P- Z* L) X
Once you determine the group that contains the ball.
: T0 S; \8 K. l. YSimply weigh two of the balls