Any Rubik's Cube can be solved in 20 moves, but it took over 30 years for anyone to figure that out

In 2010, a group of mathematicians used a bank of supercomputers at Google to show any Rubik's Cube could be solved in 20 moves.
BBC

Square and cube numbers

Which is 9. So 9 is a square number. Here are some other examples of square numbers. Can you see how all these numbers can be arranged into a square? Which is 64. So 64 is a cube number. Here are some ...
BBC

Volume of cubes and cuboids

To calculate the volume of a cube, the length, width and height dimensions are multiplied. Volume is measured in cubic units. These are unit cubes which may be mm³, cm³ and m³. There are multiple ways ...