1st trial - put 6 balls at each side .. take out the lighter 6 balls
4 U; N( B7 V0 t( L. H2nd trial - put the heavier 6 balls by 3 balls at each side
. w' r, y- w, w5 \6 F" U+ a6 [lastly, take out the lighter 3 balls.... now left 3 balls..
/ j6 g9 L8 ^- u! h- U5 u1 P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... |