Divide the 12 balls into 4 groups of 3's.5.39.217.76( u. H$ k+ a# }7 r
Weigh group 1 & 20 [! M4 Z p6 G$ c: O- V( W
then weigh group 2 & 3 6 N3 O2 X3 l! o8 f公仔箱論壇If the results are Equal & Equal, it means the ball with the different weight is in group 4. ; F5 n( d: M, C8 p5 G) v6 ?If the results are Equal & Unequal, it means the ball is in group 3. : }1 J; I9 q/ E7 q! T公仔箱論壇If the results are Unequal & Equal, it means the ball is in group 1.公仔箱論壇7 x! G* W' D# J% H! T# H
If the results are Unequal & Unequal, it means the ball is in group 2. 5 `( c" }1 P1 F+ L+ }! B0 z - n: c) {0 X& X) n' b: [公仔箱論壇Once you determine the group that contains the ball. ; }2 t0 a: a/ L% X& l) q公仔箱論壇Simply weigh two of the balls
發表於 2007-11-15 03:54 PM
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