1st trial - put 6 balls at each side .. take out the lighter 6 balls. y& v* o5 ^# h' q- J
2nd trial - put the heavier 6 balls by 3 balls at each side' s* o1 ?: Q+ f6 S4 _% _$ x; C
lastly, take out the lighter 3 balls.... now left 3 balls..
! @ R4 v o, `, B! u: m公仔箱論壇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... |