1st trial - put 6 balls at each side .. take out the lighter 6 balls
$ F0 v+ v, S1 a3 k) t2nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇3 m/ B& }6 j; `6 V2 a* [
lastly, take out the lighter 3 balls.... now left 3 balls..6 U% \5 ^3 s$ z9 ^4 N: i8 R
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... |