Want to exercise your brain over the Christmas break? Why not take part in the GCHQ Christmas puzzle challenge!
The puzzles include skills such as codebreaking, maths and analysis and test lateral thinking, ingenuity and perseverance. Just like the work that goes on at GCHQ every day to keep the country safe, the Christmas brainteasers will require different approaches and different ways of thinking.
Follow the link below to find out more and download the challenge document.