Devil's Number

The Devil's Number
The face of the Devil visibly changes into a randomly chosen number in a stunning manner.
You explain to your audience that the numbers we use in day to day life can have a darker meaning. A laminated card is shown with a drawing of the Devil on one side, and a grid of numbers on the other, you explain it will be used to see if you can find a number linked to Satan. Your spectator makes a choice of some random numbers from the card, they are added up and the total noted down. When the card is turned over the drawing of the Devil transforms into a number, and this number matches the randomly chosen total. For a finale you reveal the significances of this number in ancient numerology.
Easy to perform with the specially printed laminated card and pen. No sleight of hand, just two well known magic principles used.