This is a trick that has been custom designed and made for Letterbox Magic.
The spectator can choose and number between 1 & 63 from some “lottery number selection” cards. Without even looking at the faces of the cards, the magician can tell the spectator exactly what number they are thinking of.
The magician can take this a stage further and add another level of mind reading to the performance with a great prediction that has been in plain sight the whole time.
There are 3 completely different tricks detailed in the video tutorials as well as various levels of difficulty so the tricks get better as you do.