GCHQ stands for Government Communications Headquarters, and we’re one of the UK’s intelligence agencies (you might have heard of our partners, MI5 and MI6!). 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.