Toy enigma that challenges ingenuity. Solutions to puzzle may require recognizing patterns and creating a particular order. People with a high inductive reasoning aptitude may be better at solving these puzzles than others. Puzzles based on the process of inquiry and discovery to complete may be solved faster by those with good deduction skills. A popular puzzle toy is the Rubik's Cube, invented by Hungarian Ernő Rubik in 1974. Popularized in the 1980s, solving the cube requires planning and problem-solving skills and involves algorithms. There are many different types of puzzles, for example a maze is a type of tour puzzle.
Missing Link (puzzle) one row to another, up and down. There are 15 tiles and a gap, giving a maximum of 16! arrangements. However, the middle tiles of each four-tile chain are identical, and each position is equivalent to seven other positions obtained by rotating the entire puzzle (about its axis or upside-down), reducing the number of arrangements to 16! / 8 / 8 = 326,918,592,000. If the three long chains are also considered interchangeable, then the number of arrangements is further reduced to 16! / 8 / 8 / 6 = 54,486,432,000. Missing Link (puzzle) Missing Link is a mechanical puzzle invented