i thing the answer is
! g- @. V+ N& x6 Qwww1.tvboxnow.comstart with 4 on each side of the scale,this will have two possible outcome, same or diff.
1 e$ ]* b0 ]! j' Q6 |/ z6 e8 o9 D Q公仔箱論壇If the same then 4 that left over contain the odd ball. put 1 of the 4 to each side, two outcome, same or different again. Replace 1 from the remaining, if the same then left over is the odd or if different the replacement is the odd one. I didn't time myself but I think I take less than 30 minutes. There are two more possible out come but still need three weighing but I think I am running out of space. |