Divide 3 groups first.
6 m$ b* L. A- d$ H$ d) si.e. 4 x 4 x 4.
3 A, \( }/ H2 c! c2 a: \0 pWeight any 2 groups [1st]9 Q& s V! U3 }7 j' ]* Z$ G
then you will know the heavier ball in which group.6 }7 v1 c: c- p: @
Weight any 2 balls in that group [2nd]tvb now,tvbnow,bttvb+ x6 _ I- Z% t, D6 W% X
then you will know the heavier ball in which 2 balls.公仔箱論壇9 J5 M: `) ?' d$ D
Repeat again in remainders [3rd]5.39.217.77:88987 G' C; E0 x* o" X+ w& R7 }
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
| 
