Did you crack part B this week? It was a bi-literarie cipher, also known as a Bacon cipher. The text was in blocks of four to confuse you, but every fifth letter was a capital to suggest that blocks of five were important. Each block of five represented a binary number with a or A representing 0 and b or B representing 1, and the corresponding numbers encoded A, B, C, D E, etc as 0,1,2,3,4, ... Not too bad once you saw what was going on, but a devil if you can't see it!
Part A was a bit more straightforward - but things are a lot trickier than Challenge 1A. congratulations to the winners of the prizes for Challenge 5A:
| Dom, Jamie, James and Simon from Alcester Grammar School Shen Ye, Alex Andreou and Alastair Robertson, from The Latymer School George Walker, Andrew Gale, Sril Kadari, Aleksander Shilling, Adam Wilkosz, Charlotte Corrigan, Charlotte Mings, Chris Lei, Pinky Ip, Oliver Gillespie, Kieran Hogarty, Aple Chung and Sophie Lynch from St Albans Catholic High Emily Gray, Madde Hann and Amy Middleton from Whitby Maths Club S from The Henrietta Barnett School Ben Spicer, Jawwad Farid and Jory Dunworth-Warby from Bridgnorth Endowed Ellie Wright from Whitby Maths Club cherub200 and nannah from Ventnor Middle School
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