1st trial - put 6 balls at each side .. take out the lighter 6 balls6 f1 T U& r; V3 {" }$ n' V" ]5 m
2nd trial - put the heavier 6 balls by 3 balls at each side
2 V" q5 v, I) _5 c' R) _) A) ilastly, take out the lighter 3 balls.... now left 3 balls..公仔箱論壇9 W& w( _7 U% I/ \6 g, @ [* ^
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... |