Here's a trick you can do:
1) Allow the spec to select 9 cards out of a deck.
2) Fan the cards in front of the spec, and ask him/her to remember ONE card.
3) Now, let the spec shuffle the card.
4) Spread the card into 3 columns, left to right.
5) You'll end up with 3 piles of 3 cards.
For count = 1 to 3
6) Pick up the first pile, and fan it infront of the spec, asking if their card is in the pile.
7) Keep doing this until the spec says yes.
8) Then, place the pile containing their card in the middle of the other 2 (stack the cards up).
9) And spread em into 3 columns of 3's again, left to right, starting from the first card till the end.
Next count 'repeat it 3 times
10) Their selected card is the 5th card, or rather, the card in the centre of the current deck.
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