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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Silver Puzzle Cards
[LOCKED] [Puzzle] #243 Silver - Shuffled
Moderators: AnthraX101, bagsbee, BrianEnigma, cassandra, Giskard, lhall, Mikeyj, myf, poozle, RobMagus, xnbomb
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doomsdayred
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Joined: 02 Nov 2005
Posts: 107
Location: Nottingham, UK

Flux-Deluxe wrote:
I don't have the time to check this out right now, but has anyone tried this?

http://members.shaw.ca/a00/eflewqewfoo.html



I don't think this helps as it seems to be dealing with upper and lower case letters. I'm interested in that "this system" cipher mentioned though.

Does anyone have any info on it?

PostPosted: Fri Jan 13, 2006 4:43 am
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ALISDAIRPARK
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Joined: 27 Nov 2005
Posts: 1646
Location: Everywhere else

I can't be certain, due the broken link, and the wonderfully descriptive name, but I think it's this one:

http://www.hypermaths.org/quadibloc/crypto/pp0105.htm
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PostPosted: Fri Jan 13, 2006 6:37 am
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padge
Boot

Joined: 05 Jan 2006
Posts: 43

The motorbike

We're kind of overlooking the motorbike clue. There's got to be something in it. The bike is so prominent on the card box, it HAS to be a clue. It's bugging me because I just can't see how it fits in. Everything else has an explanation but I can't figure out the bike.

So far, from earlier in this thread people have suggested that the bike is a "Chang Jiang", because of the other clue on the side of the card deck - "Made in China". It is a famous chineese bike, and it looks like it too. I've tried decoding the text using Chang Jiang as a passphrase but no joy.

Doeas anyone else have any other ideas on the bike clue?

PostPosted: Fri Jan 13, 2006 6:56 am
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BBuck
Decorated

Joined: 13 Dec 2005
Posts: 184

Might be on to something regarding the mapping of the 108 characters in the middle.

I formed a grid to convert pairs of characters to numbers. AA=1, BA=2, ZA=26, AB=27 and so on, up to ZZ=676. I then listed the pairs in order (going with them in the order they are written, ie WB BM CH etc). This gives:

AA 1
AM 313
BM 314

etc, with the complete list as:

1,313,314,185,419,499,655,188,292,526,137,215,527,553,605,631,346,
398,35,191,373,503,36,296,374,504,401,583,298,610,377,199,18,486,
616,331,151,307,48,334,594,49,205,647,24,388,285,311,363,597,416

Then dividing by modulo 13 gives the following result:

1,1,2,3,3,5,5,6,6,6,7,7,7,7,7,7,8,
8,9,9,9,9,10,10,10,10,11,11,12,12,0,4,5,5,
5,6,8,8,9,9,9,10,10,10,11,11,12,12,12,12,0

This is far too neat to be random. I think it shows that there is definitely an order to the pairs of letters, and that the idea of mapping them onto 1-52 is the way forward.


Ignore the above: mathematical naivety (see post below)

PostPosted: Fri Jan 13, 2006 7:12 am
Last edited by BBuck on Fri Jan 13, 2006 8:12 am; edited 1 time in total
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addybobble
Boot


Joined: 01 Jan 2006
Posts: 23

Hi, on the subject of bikes I was thinking we could be talking about a wheel cipher such as a Jefferson wheel cipher. Kind of corny, I know, but there are lots of ciphers relating to wheels (eg. Lorenz).

Maybe that's what the clue is about, rather than literally being a bike.

PostPosted: Fri Jan 13, 2006 7:17 am
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Jakeo
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Joined: 30 Aug 2005
Posts: 159
Location: Edinburgh

Quote:
This is far too neat to be random. I think it shows that there is definitely an order to the pairs of letters, and that the idea of mapping them onto 1-52 is the way forward.


I like it. Unfortunately I am in work, so can't try this out myself, but I think the modulo 13 might be in the wrong place.

Try arranging the letters into 4 rows and 13 columns (or maybe the other way round).

13 is such an odd number to have lying around, and when we are talking about cards and suits it seems like not a coincidence. Also, the two cards pairs that divide perfectly.... damn that seems like jokers in my book. Smile

PostPosted: Fri Jan 13, 2006 7:19 am
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BBuck
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Joined: 13 Dec 2005
Posts: 184

Quote:
Unfortunately I am in work, so can't try this out myself


You're not the only one... Wink

PostPosted: Fri Jan 13, 2006 7:21 am
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Jakeo
Decorated

Joined: 30 Aug 2005
Posts: 159
Location: Edinburgh

Quote:
Then dividing by modulo 13 gives the following result:


Interestingly, dividing modulo 26 also gives an increasing pattern.

I'm not sure whether we have found something the sequence that produces the cipher so much as discovered that the letter sequence does have a dependency on the numbers 13 or 26. This bit of cryptanalysis would suggest that the cipher algorithm used contains the number 13, and given its relation ship to playing cards I would guess it involves the layout of the suits.

I also modulo 4'd the numbers to see if there was anything there (hoping it would come out nicely at 13 each Smile ) but unfortunately, its not an even spread.

PostPosted: Fri Jan 13, 2006 7:48 am
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BBuck
Decorated

Joined: 13 Dec 2005
Posts: 184

Quote:
I'm not sure whether we have found something the sequence that produces the cipher so much as discovered that the letter sequence does have a dependency on the numbers 13 or 26.


Umm. Embarassed Been thinking about this a bit more, and realised this is a total dead-end. The formula I used to convert the pair of letters xy to numbers is x + (y-1)*26 (A=1, B=2, etc). Modding this by 13 or 26 will leave just x. So it will give always give an increasing pattern.

V sorry to waste time. I'll edit the above posts now.

PostPosted: Fri Jan 13, 2006 8:11 am
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Jakeo
Decorated

Joined: 30 Aug 2005
Posts: 159
Location: Edinburgh

Thank goodness you spotted that. I was staring at the numbers trying to work out why they had the same frequency as some of the text analysis I had done.

See this is what happens when you try doing crypto while pretending to be working! Razz

PostPosted: Fri Jan 13, 2006 8:28 am
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Danives
Boot


Joined: 28 Dec 2005
Posts: 47

Just something I did here, dunno what to do with it so maybe someone can use it to do something useful, lol. Its a chart where I separated the code into two letters in each cell, along with the alphabet number realtions next to them. Maybe someone will see something Confused
Shuffled.xls
Description 
xls

 Download 
Filename  Shuffled.xls 
Filesize  17.5KB 
Downloaded  166 Time(s) 
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PostPosted: Fri Jan 13, 2006 5:20 pm
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arcangel
Greenhorn

Joined: 13 Jan 2006
Posts: 5

i have a cunning idea
the code on the box is definatly a solitare cypher
the code is written in the appropraite 5 letter combinations (apart from LUL)
as the card is asking for a name, we can assume the heat hidden letters (first two and last two) are the ones we are decoding

all we need now is the pack of cards and its order

ive hear some people talk about the PerplexCity cards having traditional card markings on them (for example card 41 - whipsmart wordsearch- which has the marking - 9 of dimonds)
these cards could be our deck, (with the card numbers showing there original order)
all we are missing are the jokers.
all the cards with suit markings are prime numbers(cant rembeber were i heard that but its correct)
, and there are 54 prime numbers in the perplex city cards
so can somone with more cards (maybe the whole set) figure out which cards are the jokers??

and then we can work out the solitare cypher, crack the code, and catch us a worm maker?

whos with me> ??

PostPosted: Fri Jan 13, 2006 6:03 pm
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Danives
Boot


Joined: 28 Dec 2005
Posts: 47

This is what we've been trying to do for ages. First when submitting the answer it asks for what the message reads. Second its more likely to be the main bit of text seeing as heat sensitive letters disapear rather than appear. Also, the cards can be solved independantly of everything esle, everything you need is on the card and in your mind.

Finally, the deck is in its original order, the ONLY touched card is the joker, so if it was the solitaire cipher it would be using a new deck that hasnt been shuffled.

All you stated has been said previously, and a lot more if you want to look and find some more ideas. Smile

Dan
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PostPosted: Fri Jan 13, 2006 6:12 pm
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arcangel
Greenhorn

Joined: 13 Jan 2006
Posts: 5

well there goes that cunning plan
sorry for wasting your time dan

PostPosted: Fri Jan 13, 2006 6:15 pm
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Danives
Boot


Joined: 28 Dec 2005
Posts: 47

It wasnt a waste of time, it was a good reminder, and its also gd to see more people trying to solve it and joining Unfcition to try and help solve the puzzles Smile Although you'd prob want that from one of the more distinguished members, lol.

As far as I can see, Im pretty uncertain that its a solitaire cipher, because otherwise the deck should be in order. Although its probably a cipher that depends on the order of the words, seeing as the heat sensitive words disapear, if we found the correct cipher to use and used the whole code we would get the wrong answer, so it is very likely its not a substitution cipher. Im still thinking that the 108 characters being halfed can be related to a pack of cards (108/2 being 54), and the fact they talk about poker it may be something to do with that, although what I'm not sure...my brain hurts!! lol
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PostPosted: Fri Jan 13, 2006 8:45 pm
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