A hiker walks 10km due south from her campsite.
From that point, she walks 10km on a bearing of 090°.
Then, she walks 10km due north.
She ends up back where she started.
Where is her campsite located?

Watch the video as Tom Crawford explains the four key facts about bearings that you’ll need to know to help you solve this maths puzzle and support your GCSE maths revision.