jexmand

1st trial - put 6 balls at each side .. take out the lighter 6 balls
/ X# ^- G( A: I/ }2nd trial - put the heavier 6 balls by 3 balls at each sidetvb now,tvbnow,bttvb- P( g! k. P, o+ `: p2 L+ D# }. `
lastly, take out the lighter 3 balls.... now left 3 balls..tvb now,tvbnow,bttvb! i; R" B$ U' P7 W4 f
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...