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
House at 729 Dedham Street by a local schoolteacher. The house was listed on the National Register of Historic Places on September 4, 1986. House at 729 Dedham Street The House at 729 Dedham Street is a historic house located at 729 Dedham Street in Newton, Massachusetts. The 1-1/2 story wood frame house was built c. 1855, and is a rare local example of a Greek Revival cottage. It is five bays wide, with its roof line oriented side to side. Below the roof is a wide entablature, supported by corner pilasters. The front entry is flanked by half-length sidelight windows, with sash windows in