A Magic Trick

Anna comes to me and holds up a handful of playing cards, fanned out with their backs to me. "Pick a card, any card!" she says.

I take one, but she stops me before I can see what it is. "No, no, don't look at it!" she says. "Put it back." So I do.

"Now, close your eyes," she commands, then shuffles the cards together and fans them out again. "Open your eyes now," she says, and selects a card and shows it to me. "Is this your card?"

"Honestly, I have no idea," I say.

"I win!" shouts Anna, laughing.

Now you try it!