Get ready for the GCHQ Christmas Challenge 2025
Get ready to solve the latest GCHQ puzzles and brainteasers, as the Christmas Challenge returns.
The Christmas Challenge is designed by GCHQ’s own codebreakers to give your brain a festive workout. Packed with fiendish puzzles and brainteasers, the Challenge inspires pupils age 11-18 to think creatively, work together and discover the skills they might need to become a spy.
The puzzles aren’t meant to be solved alone – students will need to work together, each bringing their unique perspective to the challenge. At GCHQ, we believe the right mix of minds means we can solve seemingly impossible problems.
Schools can sign up from 3 November 2025 using the GCHQ Christmas Challenge sign up form.
Teachers who sign up early will get:
- Exclusive access to the challenge the day before the public launch
- Bonus lesson planning materials, to help their pupils prepare and learn more about GCHQ.
The challenge goes live to the public on Wednesday 10 December. Reckon you’ve got what it takes?
