1st trial - put 6 balls at each side .. take out the lighter 6 balls公仔箱論壇/ m) e$ t; L1 m7 }2 e4 C( A+ y
2nd trial - put the heavier 6 balls by 3 balls at each side1 W/ |- \. B3 j; r' Y
lastly, take out the lighter 3 balls.... now left 3 balls..
% ] g0 S0 i. Y% m8 v3rd 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... |