If you're looking for a striking and easy-to-perform magic trick, this one's for you.
Here's how it works:
The magician places 4 numbered cards on the table.
The values ​​of the cards and their respective numbers are added together, resulting in a different value for each card turned over.
After this operation, the result is exactly the same as the one printed on a card inside an envelope.
The magician takes the cards out of the box and counts them until reaching the predicted number. This is the only card with a different back.
But that's not all: when turning over the card that was inside the envelope with the sum result, we can see that
the back reveals a card exactly the same as the card in the deck.
This trick has 3 effects in a single performance.
Completely automatic, no need for memorization or special movements.