1st trial - put 6 balls at each side .. take out the lighter 6 balls
0 w4 i* n' s; b) |$ a! ]1 G. }5.39.217.762nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇- k* x# o& ]8 d' F8 z p' i
lastly, take out the lighter 3 balls.... now left 3 balls..5.39.217.76, o( O0 @- }0 w' B7 i# D2 n
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... |