I remember when I was a kid probably 2nd or 3rd grade my Uncle Henry pulled this trick on me using simple math.  It astonished me so much that I was determined to figure out just how it worked.  Being a natural math nerd also played into my motivation and I eventually discovered the solution to the elementary mind reading.  What is the trick you might ask…  Let me give you a basic example and I am sure it will be very obvious.  Again, it is not to astonish an …