How can I arrange 12 cards so that in any direction there are 4 cards
It's probably not a trick, but a trick or a puzzle that the audience is asked to solve. Take the deck of cards and place 9 cards in 3 rows of 3 cards in each row. Then ask viewers to put 3 more cards so that in any direction there are 4 cards. If someone from the audience can do this, then just praise him. If no one can do this, then do it as follows. Put one card on the first card of the first row, put the second card on the second card of the second row, and place the third card on the third card of the third row.
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