this is too easy!!
`9 a5 v' `. ]公仔箱論壇- u3 Q; L& G7 \/ `
1. put 6 at each side.. take the one side which is heavier+ F( q, w- s) O* z0 G: `5 A3 N
2. put 3 at each side.. also take the heavier side公仔箱論壇/ R9 w; z, i2 M9 v' q9 \
3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball.. |
發表於 2009-1-7 05:31 AM
| 
