The second order is 6 sides, 2x2x2 has two rows and two columns on each side, and a ***8 grid;
The third order is 6 sides, 3x3x3 has three rows and three columns on each side, and it is a square of ***26 except that there is a piece missing in the middle;
The fourth order is six faces, 4x4x4 with four rows and four columns on each face, except for the eight pieces not in the middle, one ***56 pieces;
The fifth order is six faces, 5x5x5, with five rows and five columns on each face. Except for the 27 pieces that are not in the middle, there is also a ***98 grid.
The Rubik's Cube, also called Rubik's Cube, was originally a mechanical educational toy invented by Professor Ern Rubik of Budapest Institute of Architecture in 1974. There are many ways to play Rubik's Cube, such as racing, blind twisting and single twisting. And the popularity will not drop for a long time. Every year, large and small competitions are held, which is one of the most popular intellectual games.
The Rubik's cube in the usual sense refers to the third-order Rubik's cube in the narrow sense. The third-order Rubik's cube is usually a cube, made of elastic hard plastic. The conventional racing game is to disrupt the Rubik's cube and then restore it in the shortest time. The generalized Rubik's cube refers to all kinds of geometric bodies that can be disturbed and restored by rotation.
Origin:
1970 In March, Larry Nichols invented the "jigsaw puzzle that can be rotated in groups" and applied for a Canadian patent. It is a 2×2×2 Rubik's Cube, but each Rubik's Cube is attracted by magnets. 1972 obtained the American patent, two years earlier than Professor rubik's third-order Rubik's Rubik's cube.
Rubik Erno is a professor of architecture and sculpture in Hungary. In order to help students understand the composition and structure of the space cube, he made the first prototype of the Rubik's Cube, inspired by the sand in the Danube.
1974, Professor rubik invented the first Rubik's Cube (then called Rubik's Cube), and obtained the Hungarian patent number HU 170062 in 1975, but did not apply for an international patent.
The first Rubik's Cube was sold in a toy store in Budapest in 1977. Unlike Nichols' Rubik's Cube, Professor Rubik's Cube's parts are interlocking like tenons, which are not easily separated by external forces and can be made of any material.
1979 In September, Ideal Toy Company brought the Rubik's Cube to all parts of the world, and made its debut at international toy fairs in London, Paris and the United States in February and June. 1980.
After the exhibition, Ideal Toy Company renamed the Rubik's Cube as 1980 May, and the first batch of Rubik's Cube was exported to Hungary.