Card and Number….
One of the cleverest tricks.
You do not need to remember the position of the card…
A normal deck of card and 2 selections, 2 random and unpredictable numbers which the performer would never know.

Lost 2 selections into the middle of the deck.After shuffling and cutting the deck, the performer will never touch the deck again.And the spectator(s) doesn’t need to say anything (neither the numbers nor the cards) or write down the numbers, which means performer do not need to change any position of the cards.

No need to do complicated calculation.
Spectator(s) will deal the cards themselves.

You can create a prediction for the second selection. With a little of creation, you can use this concept with only one spectator instead of two

Some basic sleights are required (Cut & Faro).