Divide 3 groups first.
8 X9 R0 |. w# X( l. `i.e. 4 x 4 x 4.
) ~ _/ G8 @ l7 ^$ I7 r) p5.39.217.77Weight any 2 groups [1st]5.39.217.77: q. D* a# ^( X5 v8 g( m* k; d# D
then you will know the heavier ball in which group.( I, y/ N. `1 D& ]- e
Weight any 2 balls in that group [2nd]7 j( H3 \# f8 t0 V
then you will know the heavier ball in which 2 balls.
# y# g7 A! d2 ]) T* A公仔箱論壇Repeat again in remainders [3rd]
Z m' a5 X9 m. }. S2 F) n公仔箱論壇Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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