Can you solve the GCHQ Christmas challenge?
This week some of our year 9 students are going to attempt to crack some fiendishly difficult puzzles as part of the annual GCHQ challenge.
Latin dancing, Indian butter and American soldiers are some of the clues for this year's cryptic Christmas challenge set by the national spy agency.
GCHQ's annual brainteaser comes in the form of a Christmas card, sent by Director Anne Keast-Butler.
This year's puzzle challenges the public to decode the names of UK landmarks, testing skills including codebreaking, maths and lateral thinking.
The deceptively tricky tasks require ingenuity and perseverance, GCHQ said.
The 2024 card also includes extra layers for those who want to challenge themselves further, with additional elements hidden within the code.
GCHQ's chief puzzler, known only as "Colin", described this year's tests as "fiendishly enjoyable".
Speaking to BBC Breakfast on Wednesday, he said a third of secondary schools across the country had already downloaded them.
