The basic idea for this ingenious trick was devised by Arthur Carter. This is Daryl’s version of two similar tricks that he saw described by Karl Fulves and Martin Gardner in two different writings. This version is a little bit easier to perform.
The magician correctly predicts in advance which one of six numbered cards, laid out in a horizontal row, will be selected by a spectator’s throw of an invisible die. The topmost number named on the imaginary die is the number used, and the number card at that location proves to be the card predicted by the performer!