Enter the maze

Pick a card

The four of hearts

You were thinking of the four of hearts

Was I right? I may not have been right - this kind of mind control is always a bit hit and miss. Please use the form below to say if the prediction was right.

Please, please don't lie though as it will help us show you how it works if you tell the truth. We will give the secret away so you can do the trick yourself once you've submitted the form.

Please check the card you were thinking of




Click submit to tell us what you were thinking

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Pick a card The Magic of Computer Science