Divide the 12 balls into 4 groups of 3's.公仔箱論壇4 O: r, l# ^; |0 O7 Z& y; a B
Weigh group 1 & 2 - N, {* ]" f! x4 g5 o7 e. ]公仔箱論壇then weigh group 2 & 3# a$ Q5 ?, U3 d- G4 n
If the results are Equal & Equal, it means the ball with the different weight is in group 4. # }( e- V0 r9 G9 b! n4 E! ~公仔箱論壇If the results are Equal & Unequal, it means the ball is in group 3. & h" ^* t, Q6 o5 t+ h3 O+ t/ }: x) }tvb now,tvbnow,bttvbIf the results are Unequal & Equal, it means the ball is in group 1.5.39.217.775 F- h% t6 U7 P6 l
If the results are Unequal & Unequal, it means the ball is in group 2. 2 A2 P/ Y& G$ }; Z% X" ? + ?: ^( T o) g1 kOnce you determine the group that contains the ball.: p4 t4 _: i) @! {, _
Simply weigh two of the balls
發表於 2007-11-15 03:54 PM
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