take out 10 balls and 5 in each side
: i4 J/ |! W, c" R; t* zif both side balance mean the other 2 balls one of them must be the heavy one then just take them to weight will find out which one is heavier.4 q5 R6 N, j+ }7 S5 t7 Y
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if the heavy ball is inside the 10 balls, take out 4 balls from the heavier side which had 5 balls to weight 2 balls in each side.
) b6 k7 O! A$ L; n4 ^; h: \+ Q& ?5.39.217.77:8898if both side balance, which mean the one left is heavy one if not, just take the heavier side to weight will find out which one is the heaviest one.
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used less then 1 min to find out the answer.... |
發表於 2007-12-31 05:47 AM
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發表於 2008-1-1 08:48 AM
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