Divide the 12 balls into 4 groups of 3's. Z& ~$ i8 h# w, X
Weigh group 1 & 2tvb now,tvbnow,bttvb/ x* y, q K+ c3 k6 Y
then weigh group 2 & 34 s7 |$ |- A- S2 j; |
If the results are Equal & Equal, it means the ball with the different weight is in group 4.
% R' [9 ?; r% I+ C/ f$ H B) ~公仔箱論壇If the results are Equal & Unequal, it means the ball is in group 3.www.tvboxnow.com' X) \' ]+ F" L" t; |( ~
If the results are Unequal & Equal, it means the ball is in group 1.
7 ?- U9 f% i( T2 f, Qtvb now,tvbnow,bttvbIf the results are Unequal & Unequal, it means the ball is in group 2.; b! I5 J6 n2 V6 N* T3 D
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Once you determine the group that contains the ball. z4 C. q7 ?% j
Simply weigh two of the balls |