12 balls names A B C D E F G H I J K L; z% f& y9 f4 U. E
1St A B C D : E F G H if balance
9 ?) z3 \1 J: w$ A- ?( Y; ]/ T2nd 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) w9 D( A5 F; [' ]/ x
3rd A (or either A-J) : K if again balance 3rd I : J (the lighter is different)
% a4 b+ h- i8 ]8 O$ lL is different |