29 Answers votes newest views recent 9Google question: In a country in which people only want boys 16What is the oldest open problem in mathematics ? 29Divide a square into 5 equal squares 8What are some mathematical concepts that were (pretty much) created from scratch and do not owe a debt to previous work? 2Is pi a good random number generator? 5Greatest power of two dividing an integer 101 rectangle <= 4 squares (2) 15Criteria for accepting an invitation to become an editor of a scientific journal 4Particular problem solved by solving a more general problem. 4Marey’s problem: Generating all prime numbers in $[n_1,n_2]$ -1Zero-knowledge proof of positivity 6Neutral tic tac toe 2Algorithm to Find all the Cycle Bases in a Graph (2) 6Balls in boxes (partition) 1Closest grid square to a point in spherical coordinates (2) 5Smallest dilation of a quadrilateral? 1Catenary curve under non-uniform gravitational field 2Uppercase Point Labels in High-School Diagrams: from Euclid? 1Calculate Standard Deviation From N Sets of Numbers 1Models of the reals which have no unmeasurable sets 2Arrow’s theorem and the postseason 1What is the smallest integer whose primality status is not known? 18Shortest irrational path 4What is the strategy for “all words valid” scrabble? 1Skewing the distribution of random values over a range 1Maximum average value within a rectangular bounding box 4Tetris in 3D with 5 units 6Can a set of tetrahedra glued together by a common vertex be isometrically embedded in R^4? 3Mediated envy-free and efficient cake cutting with n=2?