The magician displays a large (16" by 22") dry erase board with 16 squares printed on it. A completely random number is then decided on by one or more members of the audience and the magician begins filling in the squares. Within moments the entire board is full of random numbers. When all the numbers in each column are added together, they total the spectator's requested number...and when each horizontal row of numbers are added they also total the selected number...then the two diagonal rows also match and finally when the numbers in each of the four corners are added they also match! In all, there are 24 different ways to combine the random numbers on the board to match the spectator's selection!
Comes complete with board, marker and detailed instructions that make this impossible effect easy to do.