I am married to a mathematician that really doesn't like magic. Very little surprises her and very
little impresses her. I had her do this trick and I told her to tell me the card, that I don't know
where it is, what it is etc. Then I said your card is calling out to me and had her deal down to it.
She loves it and now wants to see more math magic after telling her the method. So I gave it 5 stars
and another 5 stars from her. Thank you Joseph B for releasing this gem!