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Winners for Challenge 5A |
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Written by Harry .
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Thursday, 05 November 2009 13:17 |
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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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Ada Lovelace |
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Written by Harry .
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Monday, 09 November 2009 09:20 |
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As a follow up to her previous article on Babbage and the Difference Engine, Dr. Aditi Kar has written an article entitled Lady Ada Lovelace and the analytical engine. |
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Winners for Challenge 3A |
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Written by Harry .
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Thursday, 22 October 2009 08:18 |
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Well done to everyone this week. Did you spot that Monhier's message to Lord Pennylaine was encrypted using a keyword substitution using the keyword FRANCE? He may be a treacherous enemy of the British Empire, but you have to admire his patriotism. A curiosity of the cipher this week was that the letters S, T, U, V, W, X, Y and Z were all substituted by themselves. Here is the substitution table Monhier used in part 3B:
| A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
| F |
R |
A |
N |
C |
E |
B |
D |
G |
H |
I |
J |
K |
L |
M |
O |
P |
Q |
S |
T |
U |
V |
W |
X |
Y |
Z |
And now the announcement you are all waiting for: here are the winners for this week's part A prizes:
Keir Edwards, Tom Russell and Benjamin James from Queen Elizabeth's School
Carl Martyres, Jonathan Hughes and Edward Rewse from The Kings School, Peterborough
Example B from Our Lady's Catholic Primary School
Meeting Place from Southend High Shcool (sic) for Boys
Georgina Hughes from Harlington Upper School
Matt, Ollie, Connor, Jack, Corey and Matt T from Bishop Milner Catholic School
Claire Baily, Beth Hutchings and Beth Norris from Honiton Community College
Jane, Tess, Abi, Hannah, Eilidh, Jack and Joe from Newminster Middle School
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PS Harry might or might not be an alumnus of Westcliff High School for Boys, so he is delighted to see that the team from the old enemy, Southend High School for Boys can't spell School! This is a useful reminder to everyone to make sure their profile details are correct and complete. |
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Winners for Challenge 4A |
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Written by Harry .
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Thursday, 05 November 2009 13:17 |
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How did you get on? Part B caused some anguish this time I think, and even part A was a bit tricky. Just take a look at Challenge 5 if you want to get serious!
Here are the winners of the prizes for Challenge 4A. Well done to all of you (and to those who haven't won anything yet I say an even louder congrats for your staying power - keep trying)
Carlton Leonard from harrow way
Ryan Green from Wrenn school
Vit Huang, Rose Norris, James Burton, Bradley Conder, Aaron Kirkbride, Holly Marshall, Peter Owen, Jamie Pitts, Shaun Trussell, Robert Wight and Arron Reed from Fearnhill
Amber Clark and Charlotte Clift from Woodlands School, Basildon
Jena Glover-Dickson and Bethany Ashley from Harlington Upper School
Edward, Jon, Adam and Rachel from Amery Hill
Daniel Bilton from Farnborough School
Georgia, Charly, Serena, Libby, Stevie and Rachel from Newport Girls' High School
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Points for Challenge 3 |
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Written by Harry .
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Thursday, 15 October 2009 14:15 |
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Please do take a look at the points scheme for Challenge 3, you need to get your solution to 3B submitted by midnight tonight to get full marks! There is a link on the Challenge page which shows how they are to be awarded. All the best, Harry |
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