Practice
How the test works
Each map is a grid of streets with lettered crossings round its edge. Two letters are marked in red: the start and the finish. Some streets are closed, each marked by a white dot, and ten numbered buildings stand in the corners of the blocks. Find the shortest route from one red letter to the other and type the number of the building it passes.
A route passes a building when it uses either of the two streets beside it. Going through the building's crossing along other streets does not count.
The one rule that settles every map
On a grid there are usually several equally short routes, but on every map they all pass the same building, and no other numbered building lies along any of them. So you do not need to find "the" route: find where the closed streets force every short route to go, and the building there.
How to practise
- Free: 12 practice examples a day across the four tests, with correct or wrong after each answer.
- Full access: unlimited practice, timed tests of 3, 5 or 10 minutes, the full guide (tricky maps, how to train), the shortest route drawn in green after each answer, a tip after every mistake, and your progress.