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 Nine cards (Posted on 2005-10-14)
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.

 See The Solution Submitted by pcbouhid Rating: 2.7500 (8 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 re: solution | Comment 4 of 30 |
(In reply to solution by derek)

If you found 4 solutions and notice that they are rotations of one of them, you used a computer. How about reasoning?

Edited on October 14, 2005, 3:05 pm
 Posted by pcbouhid on 2005-10-14 15:01:49

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