Pick a card, any card!

How often have you heard magicians say that? The normal routine is that you pick a card, the magician shuffles the deck, and abracadabra, reveals your chosen card. But behind this magic often lies some interesting maths and computer science...

If you've been to our cs4fn Computer Science Magic show and read our Magic Show booklet then here are some variations on those tricks, some different ones and some more of the computer science.

It isn't just magic though it all has links to computer science - and not just because of high technology - in fact high technology hardly comes in to our shows at all though yesterday's magic often becomes today's technology and is taken for granted.