jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls$ G8 K- D+ l; u; o( r$ x) }: ?
2nd trial - put the heavier 6 balls by 3 balls at each side5.39.217.76! H" n) S. Y: ^( m, c4 k
lastly, take out the lighter 3 balls.... now left 3 balls..
  R! ^3 j7 K% \' o) W' @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...