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 (film) joke. Enraged, he tells them he's had enough with their tricks and that no matter what happens he knows he is real. The Man then leaves the Cube as the people applaud him. The Man is then escorted into an office so that the head of the organization can sign his release. Once there, the Man reflects on the revelation of his own realness. He accidentally cuts himself with a knife while demonstrating and is asked to taste his blood. He does so and discovers his blood is strawberry jam. The head of the organization and the office fades away