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不知道
let me see the answer
Divide 3 groups first.公仔箱論壇* M' H7 V" T. C4 J/ K$ u, G+ u
i.e. 4 x 4 x 4.
* [  y; R1 F% KWeight any 2 groups [1st]
. G" N# Y6 s" z' athen you will know the heavier ball in which group.tvb now,tvbnow,bttvb' a( J! w7 c) A5 w0 Y
Weight any 2 balls in that group [2nd]www1.tvboxnow.com' G! ?1 ?' f$ a
then you will know the heavier ball in which 2 balls.  m* ]1 {3 R) X% i; w
Repeat again in remainders [3rd]% I9 B3 G/ t/ s+ g# F! D& i, c
Got the heavier ball.
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有呒答案噶?
thx you
睇过先知
thanks
我知道
so easy
easy only 1 min done
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