Cube (algebra) however, easy to show that most numbers are not perfect cubes because "all" perfect cubes must have digital root 1, 8 or 9. That is their values modulo 9 may be only −1, 1 and 0. Moreover, the digital root of any number's cube can be determined by the remainder the number gives when divided by 3: Every positive integer can be written as the sum of nine (or fewer) positive cubes. This upper limit of nine cubes cannot be reduced because, for example, 23 cannot be written as the sum of fewer than nine positive cubes: The equation has
The Cube (restaurant) The Cube (restaurant) The Cube is a pop-up restaurant created by Electrolux. Since 2011, two versions of the restaurant have been located in different cities in Europe, where a number of guest celebrity chefs have brought teams and dishes from their own restaurants to cook in the spaces. The Cube was designed by Park Associati design studio in Milan, and the construction covers a space of 140 m. It has an outside balcony allowing for a 360-degree field of vision. The exterior shell is made of aluminium and has hexagonal shapes cut into the shell by laser in order to