Rubik's Cube (English: Rubik's Cube), known as the Rubik's Cube in Taiwan Province Province and the Twisted Dice in Hongkong, is a Hungarian architecture professor and sculptor Rubik Ern? 0? 2) 1974 The mechanical educational toy was originally called Rubik's Cube, and later it was changed from an ideal toy to a Rubik's Cube. It is estimated that since its invention, the Rubik's Cube has sold more than 300 million pieces worldwide. Rubik's cube was the most popular in the 1980 s, and it has not declined so far. Shortly after its appearance, many similar toys appeared one after another, some from the inventor's Rubik's Cube, including the second, fourth and fifth versions of the Rubik's Cube; Some are made by others. Professor rubik, the inventor of the Rubik's Cube, obtained the Hungarian patent number HU 170062 at 1974. He thought that others didn't want to produce this kind of toy, so he didn't apply for an international patent, but in fact cloned products appeared almost immediately. Rubik's cube is defined as a toy for entertainment. The English official name is Rubik's cube, named after Professor Rubik. It is the most common and primitive Rubik's cube at present. It is a third-order cube, which consists of 26 small squares and a three-dimensional cross connecting shaft. It contains 6 immovable blocks located in the center of the face, 12 edge blocks and 8 corner blocks. All six faces have one color. Generally speaking, the colors of a standard Rubik's cube should be blue, white, red, green, yellow and orange, with blue-green relative, white-yellow relative and red-orange relative. The earliest Rubik's Cube was invented by Professor rubik, but not for production and entertainment. As a professor of architecture and sculpture, he made the first prototype of the Rubik's Cube to help students understand the composition and structure of the space cube. After he finished his first work, he turned it over a few times and found that the original neat Rubik's cube was difficult to recover, so he realized that this new invention would be difficult. But what he didn't expect was that this toy with a side length of less than 6 cm would be popular all over the world in the future, and even a movement with Rubik's cube as a prop appeared. See:/Zhang Hui/blog/mofang/200903/20090314095447.html.