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
Curiosity: What's Inside the Cube? You're not just doing things in the cube. You don't realise it but you're doing something in something else as well at the same time." Peter Molyneux claimed that "what is inside the cube is life-changingly amazing by any definition". Critics stated that the game designer might be over-promising. When it was suggested to him that he should "tone down the enthusiasm", he responded: "I don’t want to believe less in something. I want to make something that is worthy of the emotion behind it." "Curiosity" was one of the few games that could be successfully played by a simple