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In the mathematics of sums of powers, it is an open problem to characterize the numbers that can be expressed as a sum of three cubes of integers, allowing both positive and negative cubes in the sum. A necessary condition for an integer to equal such a sum is that cannot equal 4 or 5 modulo 9, because the cubes modulo 9 are 0, 1, and −1, and ...
Hilbert's third problem. Two polyhedra of equal volume, cut into two pieces which can be reassembled into either polyhedron. The third of Hilbert's list of mathematical problems, presented in 1900, was the first to be solved. The problem is related to the following question: given any two polyhedra of equal volume, is it always possible to cut ...
KooBits (stylised as KooBits with capitalised K and B) designs and builds digital products for children and educators. KooBits was founded in 2016 by current CEO Stanley, with Professor Sam Ge Shuzhi and Dr Chen Xiangdong. [1] The trio saw an opportunity in the rapid growth of the ebook industry and decided to focus on creating software for ...
The Ages of Three Children puzzle (sometimes referred to as the Census-Taker Problem [1]) is a logical puzzle in number theory which on first inspection seems to have insufficient information to solve. However, with closer examination and persistence by the solver, the question reveals its hidden mathematical clues, especially when the solver ...
May 13, 2024 at 3:03 PM. Elaine Hall never got to wear a white wedding dress and a veil when she married her first husband at 18. Seventy years later, after reconnecting and falling in love with ...
Zeekr's prospectus disclosed a surge in total revenue to 51.67 billion yuan ($7.3 billion) in 2023, up from 31.9 billion a year earlier. However, its loss from operations widened to 8.18 billion ...
Sum and Product Puzzle. The Sum and Product Puzzle, also known as the Impossible Puzzle because it seems to lack sufficient information for a solution, is a logic puzzle. It was first published in 1969 by Hans Freudenthal, [1] [2] and the name Impossible Puzzle was coined by Martin Gardner. [3] The puzzle is solvable, though not easily.
Updated May 8, 2024 at 9:04 AM. Severe weather that has been uprooting Plains states for weeks turned its attention to Michigan on Tuesday, trapping workers and wiping out a mobile home park ...