The 15-puzzle (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and many others) is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing. The object of the puzzle is to place the tiles in order by making sliding moves that use the empty space.
Magic square will read your mind 1. Think of any two-digit number. 2. Subtract from it constituents its numbers. (eg, the number 63 necessary to subtract 6 and 3, you get 54). 3. Find this number in the table and the symbol to which it corresponds. 4. Imagine yourself mentally that symbol. 5. Click "Show"