Solving the seemingly impossible is part and parcel of our work to keep the country safe. You don’t have to be a quiz champion to work here, at GCHQ but we’re a place where having an analytical mindset can be really useful.
Test your mind with some of the fun puzzles below set by our puzzling community. They may appear difficult at first but try to see if you can spot a pattern and think around the problem.
If you enjoy solving these and would like to have a go at more puzzles like this, visit the puzzle page on our website here.
Read more from GCHQ:
You Know About MI5 And MI6, But What About GCHQ?
Why Speaking Foreign Languages Is So Crucial In A STEM-Focused Organisation
Who Knew That Having An Interest In STEM Would Be So Important When You’re A Linguist At An Intelligence Agency?