12 balls names A B C D E F G H I J K L5.39.217.77$ |1 U e" f! h/ w
1St A B C D : E F G H if balance 5.39.217.77) x) {; w1 r' B. Q) ?
2nd A B (or either 2 of A-H) : I J if again balance if A B > I J (implies the different is light ball is I or J)
: o" h& n: Z, G- b( H! m. Ftvb now,tvbnow,bttvb3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)
Z) S2 ?2 f6 C. N) t4 jL is different |