Product details
The performer has a number named at random.He/she then quickly writes out 16 numbers within a grid.Upon examination all combinations within the grid are seen to have totaled the named number.
Check out the demo video.This is a great trick to know for a wide variety of situations.
Manufacturer SaysPlease note: The demo and instructional files for this product are particularly high quality.If the high-quality files don't play for you quickly, we recommend choosing the lower quality (smaller) files.
