Thank you to the hundreds of schools who have successfully registered post GDPR. Registration remains open for those schools still wishing to enter the 2018 competition. Please ensure that you have at least one student entered in order to receive the papers.
After five successful years of online challenges, there are 180 puzzles that are available to students and teachers. The entry level question for one of the challenges, chosen at random, is shown above. The other challenges can be found by clicking "The Online Challenge" panel below. We hope you have enjoyed the challenges as they came out, however, there are no plans to release new puzzles.