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
Tom Root 2004. He also wrote Archie Comics' 200th issue of "Jughead" in 2010. Root and "Robot Chicken" co-creator Matthew Senreich created the Adult Swim series "Titan Maximum" which premiered on September 27, 2009. He was a writer on Lucasfilm's "Star Wars Detours" animated series. Root also wrote "The Simpsons"<nowiki>'</nowiki> "Robot Chicken"-style animated opening in 2013. Tom Root Tom Root (born September 20, 1973) is an American writer, producer, director and voice actor for "Robot Chicken". Root was born in Iowa City, Iowa. He attended Central Michigan University, graduating with a degree in journalism. While at CMU, Root edited the student newspaper