Nine cards are disposed as shown:

           +---+---+---+
           | a | b | c |
           +---+---+---+
           | d | e | f |
           +---+---+---+
           | g | h | i |
           +---+---+---+

1) There are, at least, two Aces, two Kings, two Queens and two Jacks.
2) Every Ace borders a King and a Queen.
3) Every King borders a Queen and a Jack.
4) Every Queen borders a Jack.
Note: "border" means "touch" horizontally or vertically, not diagonally.

Identify the nine cards.

4 diff solutions:

A K Q
Q J J
A K Q

A Q A
K J K
Q J Q

Q K A
J J Q
Q K A

Q J Q
K J K
A Q A

 

Posted by derek on 2005-10-14 14:57:32