> From: CampMars@aol.com[SMTP:CampMars@aol.com]
> Reply To: firstname.lastname@example.org
> Sent: Thursday, 26 August 1999 11:04
> To: email@example.com
> Subject: Re: analyze this
> In a message dated 8/25/99 8:24:26 PM Eastern Daylight Time,
> << i am aware of many mathematical tricks (most of them trivial) with
> which performance "magicians" fake mind-reading, but this one utterly
> escapes me at the moment ... could it be the real thing? >>
> This was an easy one. They gave you all new cards so no matter which
> you pick it's not going to be there. Still fun at that first moment when
> see it missing though huh?
This used to kick around as an Excel spreadsheet (really!). It's amazing how convincing this trick really is - I've had many very intelligent people show it to me, totally sucked in.
(I was sucked in too until someone told me how it worked)