A spectator chooses a number between 1 and 15, and the magician is able to correctly name which number the spectator chose.
I’ve called this trick Mental Columns because the numbers are arranged in four columns and you’ll need to do a little bit of mental arithmetic (that’s adding up in your head) – not a lot, though – to perform the trick. You can download the numbers you’ll need at the bottom of this page.
You can also view this trick on YouTube at https://youtu.be/RQjMGTr_ruY
You can see all the previous magic lessons here.