Test your mind and your patience with this math-based puzzle that puts a freshand historicspin on classic number games like 15 puzzle, sudoku, and kakuro. Lo Shu Square requires focus and cleverness as you line up the numbered pieces so that each horizontal, vertical, and diagonal row adds up to 38. Test your brain. This math-based puzzle challenges your STEM knowledgeand your patienceas you try to line up numbers in every vertical, horizontal, and diagonal row so they equal 38. Familiar puzzle, reimagined. Similar to sudoku, 15 puzzles, and kakuro, Lo Shu brings a fresh take and new challenge to puzzle fanatics. Solve it again and again. With multiple solutions, this 3D logic puzzle can be solved over and over by the same person. See how many solutions you can find or race your friends to solve it the fastest. High quality gift. The solid wood construction and brain-stimulating play makes this number puzzle the perfect gift for men, women, and students. Recharge your brain for the LSAT or refresh your math skills with this math puzzle thats fun and educational for kids and adults. A piece of history. All brain teasers from the True Genius line are inspired by one of five different ancient civilizationsRome, Greece, China, Egypt, and the Aztec empire. Play or display. With solid wood pieces and compelling game design, this grid puzzle game is a beautiful home decoration when its not being played. Look chic and smart with a game that goes beyond traditional knickknacks home dcor.