Positive puzzles. Suitable for adults and children. 6 puzzles per page. 250 puzzles 5x5 easy levels. 250 puzzles 5x5 medium levels. 250 puzzles 5x5 hard levels. 252 puzzles 5x5 extreme levels. Thick paper. Glossy cover. Numbricks puzzle may be called or searched with the following phrases or names: numrich, numrich parts, brain teasers for adult, brain games for adults, hard puzzles to solve, numrich stock, daily logic puzzle, brain puzzles, numerical, brain teaser puzzles for adults, mind puzzles for adults, brain puzzles for adults, hard to solve puzzles, numerichs, puzzles hard to solve, numerch, nucanoe, hidato puzzle, nursery, hidato solver, sudoku, nuance, hidato book, hidato, numbers, hidato puzzle books, numrich, nurture, numero, numeral, hidato puzzle solver, nutmeat, hidato answers, daily hidato, legends of yore, play hidato, hidato rules, hidato game, nubrain, hanayama, beehive hidato, hidoku puzzles, hidato challenge answers, how to play hidato, happy creatures, hidoku solver, hidato challenge. I hope you enjoy these puzzles. Best regards, Basford Holmes