Start with your finger on the 12. Think of a number between 1 and 12. The wizard has no idea what number you are thinking of, yet after a few moves on your part he will predict which number your finger will be on!
Spell your number, move your finger one number clockwise for each letter.
For example, if you selected number 7, start on 1 and spell
S-E-V-E-N. Your new number
Click here when you have your new number