Take a look at this video.
Can you work out how Charlie ordered the cards to perform the trick?
Once you've had a chance to think about it, click below to see some suggested starting points:
Charlie started by thinking:
Luke started by thinking:
Alison started by thinking:
Can you take each of their starting ideas and develop them into a solution?
Can you use each method to perform the trick in a different language, or with two suits of cards together, or in reverse order from King to Ace, or...?
You may be interested in the other problems in our Seeing mathematically Feature.