Take a sheet of notebook paper and bend it in half ... The most common style of grid pattern is a Colonial Square pattern ...

Maps are divided into a series of squares known as a grid. These grids help us to locate ... lay a piece of string along the route or use a piece of paper to work out the distance.

Now's your chance to test your logic skills, by working out which shape has been replaced by a question mark in this grid. It may help to have a pencil and paper to jot down your thoughts.

Cloud energy storage has been investigated as an efficient optimisation method for vehicle-to-grid charging stations, where power between them could be exchanged without physical connections.