1st trial - put 6 balls at each side .. take out the lighter 6 balls
+ B4 f; e! O Z( f! E+ o2nd trial - put the heavier 6 balls by 3 balls at each side
# p. k1 v! v5 D! K4 O4 Flastly, take out the lighter 3 balls.... now left 3 balls..
( E9 w. E# Y4 [" u1 M Z3 |% {3rd trial - put 1 ball on each side, left 1 ball on table. if both sides balance, the ball on table is the heaviest. if one side on the scale is heavier then it is the heaviest... |