Cards by email
- Can we show you a new card trick, Abena?
- Go ahead!
- Pick five cards in this standard deck of cards.
- Any five?
- Let them be random. Shuffle the deck and pick five cards with eyes closed.
- OK. Then what?
- Email the five cards to Enu.
- How do I do that?
- Write down the value and suit of each card and email her.
- Enu will email me four of the five cards, and me, brilliant as I am, will be able to deduce the fifth card!
- You are bluffing!
- Try me!
Problem creator: William Fitch Cheney.