Congratulations again to everyone who did so well with Challenge 2. Did you notice that Challenge 2B was an affine shift cipher? If you did, well done, if not, well done for solving it the hard way. Anyway here are the winners of the prizes for Challenge 2A: The book prize goes to St. Anne's School, Southampton, for the work of Ms Wheeler and Ms. Day. Well done. Each of the following teams has been awarded a cheque for £25 by our magic sorting hat: Mandy Payne and Bob Bell from Bitterne Park Secondary School Andy Tom from Blatchington Mill Matt, Matt and Matt from Honywood Community School Calum from King Edward VI School, Aston Ralphy, Fluffman, Russ, Sophie, Aide, Ben and Will from Hill's Road Sixth Form College Arjun, Mark, Sam and Ryan from Smiths Lane School, Windsor Robert Hoggarth from Queen Elizabeth School, Kirkby Lonsdale Natasha Strevens from Tonbridge Grammar School