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243 votes
Accepted

This is important. I need you to listen…

(Thanks to f'' for the help in chat! He solved the majority of this puzzle - I just came in at the end.) Step 1: Crossword The crossword was solved by feelinferrety, Z. Dailey, and Sleafar: Step 2: ...
  • 142k
89 votes

Who killed Tom?

There was no murder, the police officer is trying to set you up. (Possibly trying to prove that you would be ready to accuse someone of murder based on a garbled message on a computer.)
  • 70.8k
87 votes
Accepted

Strange women and their strange ways of giving you phone numbers

Her name is Her phone number is Because The translated message is: Which, converted to plain text is: The result above Translating this, we get: These are the Which spells out the following: ...
  • 1,327
85 votes
Accepted

Who killed Tom?

  • 965
82 votes
Accepted

⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀

This question has If you
  • 142k
79 votes

Who killed Tom?

It's clearly Because Therefore As
  • 2,057
79 votes

Four boys are playing football and one of them breaks a window

Here's my interpretation. It's Let me tell you why. Observe this ==> hE iS thE CuLpriT? Now read the entire line. Now the teacher knows whom to inquire.
  • 1,064
78 votes
Accepted

The needle in the network - find it!

I noticed that four of the nodes of the graph have a quarter missing, and each of those four is missing a different quarter. With this... Though many people might convert these numbers into letters ...
  • 946
73 votes
Accepted

What was my wife trying to say?

This is Text input: output: It took me a while but when I finally got a result I was full of joy! Why was I happy?
  • 1,610
73 votes
Accepted

Why did they close my riddle?

To solve this puzzle, note the key word in the text: If we employ this on each of the three parts of the puzzle text, we can get the following: So the reason your puzzle was closed is because it ...
  • 114k
67 votes

Do you *really* know Stack Exchange?

More partial answer, work in progress: As noted in Rupert Morrish's answer: The hint: So if we decode the cipher text found above using that cipher and key, we get: So if we ROT-13 the remaining ...
53 votes
Accepted

Decipher this message for instructions to decipher this message

Let's solve this backwards as intended. Observe that every word ... Further, we can ... And indeed, ...
  • 54.5k
51 votes
Accepted

Do you *really* know Stack Exchange?

Trevor Powell did most of the work in his answer. He ended up here: This requires two stages of interpretation. First: Alternatively: Then:
50 votes
Accepted

A cipher for beginners

well,
47 votes
Accepted

Break the subsitution cipher with a twist

Scroll to the end if you just want the answer. I give a detailed explanation of how I reached it. First, I hypothesized that the permutation has two cycles: one of length 9, and one length 17. The ...
  • 24.1k
45 votes

What characteristics of a ciphertext can be indicators of a particular cipher?

I'll start with a few simple ones to get us rolling. Base64 has a 2/3 chance of requiring one or two trailing = signs - if you spot any of these, there's a very ...
  • 5,745
45 votes
Accepted

Geography at the pixel level

Looks like Once all of the places are found,
45 votes
Accepted

Can you name the Country Code™?

The country code of Brazil is: This is because: For a full explanation for each country in the original list, see the following table:
  • 114k
45 votes
Accepted

28 Minutes Later

The eight patient names 1: 2: 3: 4: 5: 6: 7: 8: Summary: And finally: Easter eggs / references:
  • 142k
44 votes

Who am I??? Wait, isn't this a sudoku?

Partial solution
  • 9,582
43 votes

Is there a secret message in the first decimals of PI?

Here's my guess Take the first 100 digits of pi: 1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 STEP 1: Based on whether a ...
  • 9,277
42 votes
Accepted

What does this modern art picture represent?

Here is an answer that decodes this image. Not being a programmer, I used ImageJ and Stegsolve to look at this file. Viewing with bit0 then bit1 provides these two images: Then continuing to toggle ...
  • 8,876
42 votes
Accepted

The strange SMS

If you interpret each two-digit number as We can interpret the full string as: Which looks a lot like Interpreting the numbers in this way gives us the string Which, with spaces, says
  • 16.9k
41 votes
Accepted

My Spying Girlfriend

The boss has encoded the numbers using: For example: The numbers are thus as follows: My contact @hagfy (real name unknown) has identified this as the highly-advanced ...and has used enhanced ...
41 votes
Accepted

Is there a secret message in the first decimals of PI?

Updated: Solution Original answer
  • 128k
40 votes
Accepted

Guide to Codes and Ciphers

This guide aims to explain various ciphers, help you understand how they work, and how to decode them with or without a key. This answer is currently being split into multiple posts to improve ...
39 votes

Dot message on a Star Wars frisbee team

The dots and dashes are Morse Code as noticed by @Randal'thor When it is translated to text it reads as follows: These are As a bonus 'Fall MMXVI' is Roman numerals for which was the season and ...
39 votes
Accepted

What is MOehm trying to tell us?

If you you get which means Giving the real name
38 votes
Accepted

The Writing's on the Wall

Taking the lines with squares on them, we get this message: $(K(AK^T)^{-1}+E^TH^T(HKO((AO)^{-1}C^T+O^{-1}K^{-1}L^T)+T^T))^T+S$ Superscript T has a specific meaning: it's the transpose of a matrix. ...
  • 33.4k

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