There are 16 unit cubes. The top layer of the cube has a volume of 16 cm³. Image caption, Each layer has the same number of cm³. Each layer is 16 cm³. There are four layers. Multiply the number ...

The year 2024 marks the 50th anniversary of the Rubik’s Cube. (photo by Tristan Nitot, CC BY-NC-SA 2.0) In 2024, the Rubik’s Cube, the puzzle invented by the Hungarian professor of architecture Ernő ...