Eight cards are placed in the diagram shown below, one in each numbered cell. These are the facts:

a) There are 2 Aces, 2 Kings, 2 Queens and 2 Jacks.
b) Every Ace borders a King.
c) Every King borders a Queen.
d) Every Queen borders a Jack.
e) No Queen borders an Ace.
f) No two cards of the same kind border each other.

        +---+
        | 1 |
+---+---+---+
| 2 | 3 | 4 |
+---+---+---+---+
    | 5 | 6 | 7 |
    +---+---+---+
        | 8 |
        +---+

In what cells could you identify the card in it ?

(In reply to re(2): To Lesley and NetGoofy by brianjn)

Yes, Brianjn, Lisa solution are correct. We canīt be sure what are the cards 7 & 8; all that we know is that they are an Ace and a Jack, that is, card number 7 can be an Ace (so card number 8 would be a Jack), or card number 7 can be a Jack (so card number 8 would be an Ace).

In short, we can only be certain about cards 1-6.

Posted by pcbouhid on 2005-06-19 02:17:56