Scarne's most famous card trick was appropriately titled "Scarne's Aces". The trick involved taking a spectator's shuffled deck of cards, performing a series of riffle shuffles himself and then cutting to all four aces. Another one of Scarne's most notable card effects was the triple coincidence, in which a spectator and a magician each pick three different playing cards out of two regular decks of opposite colors and it is shown that all of the selections match. Scarne also created a quadruple coincidence, wherein a spectator selects a card and four impossible predictions of their card are made.