-Ask for someone to tell you the year of an important personal event.
-In less than half a minute you complete a 4 x 4 magic square on the back of your own business card. Every column, row, the two diagonals, the four corners, and almost limitless other symmetrical combinations of 3-digit numbers add up to that very same year! No memory work! No complicated math!
-No worries! You even get a custom-crafted business card wallet to enhance your presentation, as well as multiple methods for performing the same effect on stage ! Become an instant genius with the bonus routine Super Sudoku that duplicates the incredibly popular puzzle format taking the world by storm.
– Kingmagic Brand , High Quality