Trick Explained:

• Step 1: When you pick a “color,” you narrow your potential correct answers to the 5 numbers from the 25 total possible that share the same color as the one you chose. [Example] I chose the number 24, which is black, the only other black numbers are 7, 11, 8 & 19 so now you can throw out all other numbers but these to be mine in the trick’s eyes.
• Step 2: This step is to throw you off, and only that. The color of your number at this point is already known and this is a step to increase mystery because many people will try and pick a color that will “throw off” the trick because it’s not the same color as the number they chose in step 1. [Example] I chose the light grey and this color never showed back up in later steps again in any significant way.
• Step 3: This is where they figure out your number. In each of the houses there is one number from each color on the original 25 number grid in Step 1. With only 5 (black) numbers to choose from the original grid they now seperate these into each of the 5 houses. When you pick your number they now know exactly which number you picked in the first step. [Example] In each of the grids there’s going to be 6 numbers, each with a different original color from the original grid in Step 1. In mine (House B) there was 10-Blue, 26-(false number given that the grid stops at 25), mine 24-Black, 9-Green, 21-Pink and 2-Red. Once you pick one of these numbers (and with the prior knowledge of what color your number was originally) the trick knows your number.
• Step 4: Another step to throw you off and add mystery. These crystal balls do nothing at all. But in the end seem to give away which door you will choose since you choose which ball of your free will.
• Step 5: Now in the final step they already have your number, all they have to do at this point to finish the trick is to put the number behind whatever door you choose. Which is exactly what they do. No matter what door you choose first. the trick will put your number behind it since the test is electronic and can make any door the “right” door (assuming you answered truthfully on the steps that mattered)

(via jacoblourawk-deactivated2012122)