1st trial - put 6 balls at each side .. take out the lighter 6 balls5.39.217.765 x8 F" u9 F& I# Q5 F9 K
2nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇6 x( q4 j3 j! e
lastly, take out the lighter 3 balls.... now left 3 balls..
, V5 y* x4 P1 f- Z! Y3rd 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... |