Divide 3 groups first.9 y2 m' \6 P* G, j& Y& Q- z2 l
i.e. 4 x 4 x 4.4 T0 |) F2 H" E$ d; n
Weight any 2 groups [1st]) D: k5 U* f3 d* }$ p) Y
then you will know the heavier ball in which group.# y2 ~8 T! A2 _9 t
Weight any 2 balls in that group [2nd]5 G3 Z+ H8 w6 e' `6 K+ O$ Y6 A
then you will know the heavier ball in which 2 balls.公仔箱論壇/ z7 F* c+ o+ \/ A- A9 m: P( ]
Repeat again in remainders [3rd]
3 C5 O5 q/ x7 G7 q8 t" oGot the heavier ball. |
發表於 2009-7-2 12:48 PM
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