Divide 3 groups first.
# {2 m: t* K% U( h, ]! {5 s. G4 l8 }i.e. 4 x 4 x 4.5 R' h! ]7 J' ] e0 v1 N
Weight any 2 groups [1st]
4 L$ L1 W4 Z; m9 \# a& Qthen you will know the heavier ball in which group.公仔箱論壇/ ~) \; G8 M) y. k+ Y, x- y4 Q
Weight any 2 balls in that group [2nd]公仔箱論壇% o6 R. z5 O2 F5 |; K2 K) a% V8 O
then you will know the heavier ball in which 2 balls.
3 j U& d+ `8 M# w" G4 f9 vRepeat again in remainders [3rd]tvb now,tvbnow,bttvb' p0 Z& H' `1 N
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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