Math is an amazing self working trick using a borrowed deck. Imagine, you let the spectator deal the deck into 2 piles, each pile has 26 cards.Now you show them a prediction. And let them chose 3 random cards in a pile. Spectator will fill the value of 3 card to number 10. And after filling, they add all the value of 3 cards. They deal the number of cards that matches with the total. After dealing, they will be surprised because the card they stopped at is the same as the prediction. + No gimmick + No setup + Self working + 1 Prediction + No sleight of hand

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