take out 10 balls and 5 in each side
! K" h, e) {" r& yif 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.5.39.217.77' y: D. b9 A) ?4 n% u
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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.
; S; P* f) O4 W% W* E) N5 `公仔箱論壇if 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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