1st trial - put 6 balls at each side .. take out the lighter 6 balls
! U: {( z7 l5 F7 Q: d, Mtvb now,tvbnow,bttvb2nd trial - put the heavier 6 balls by 3 balls at each side公仔箱論壇0 W; {* i# X9 D* H' M5 ]: U
lastly, take out the lighter 3 balls.... now left 3 balls..& V$ Z' J1 V6 H! e. k" j% L0 i
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... |