Related: Tag for prisoner puzzles? A new tag has sprung up, namely the prisoner tag. At the moment, it contains one question, but a suggested edit to add that tag was declined. Though it does class a particular type of puzzles, the setting is rather restricted (since similar puzzles can be set ...

I picked this password because it proclaimed a warning one should never, ever ignore, assuming they could discern the meaning: !P/v+-### So what sentence of warning does this string of characters state? Before anyone says anything, I will concede that I never said that it was a particularly s...

The answer to this is unknown. See the bottom for its origin. Can anyone decipher this collection of seemingly random words? There is likely a message encoded. All I have noticed is that words are grouped in a (1,2,3,4,5,4,3,2) shape by commas, and the answer may (but may not) have some key in a ...

This puzzle replaces all numbers with other symbols. Your job, as the title suggests, is to find what value fits in the place of $\bigstar$. To get the basic idea down, I recommend you solve Puzzle 1 first. All symbols abide to the following rules: Each numerical symbol represents integers an...

Suppose you have a regular polygon with n vertices (n = 2,4,6,8...), how many distinct ways are there to have each vertex connected to exactly one other vertex. For example for a polygon with n=4 you would need 2 lines to connect all vertices, for n=3 you need 3 and so on (so for n vertices n/2 l...

"Wait, since when did I have a basement? How did i not know about this in my own house? i guess i didn't actually build the house, i just live here" This riddle is to do with minecraft, I believe it involves lava or fire as another clue is "OW! It's still hot!" I have already tried looking arou...

I know that questions of the form "Use [arbitrary set of numbers] to make 2018" seem to be not very well recieved in the last days. That's why this puzzle is about making 2008. But instead of using some randomly chosen numbers, you will use the most beautiful number I can imagine: $\Phi = \tfrac...

Mahapps I am lost, perhaps that's a given, Like I was never there, gone with a whizz, Given the time, you will forget our puzzling, So leave me now, go back to your browsing! Remember me from then, when I still knew luv, More then the shell I am now, as prickly as cacti Then alone I shall b...

In my last formation-of-numbers question I somehow tricked myself, because I wanted to make a puzzle about a number that looks like a year. But the complicated solution I thought of turned out to be outperformed by a much simpler ansatz. Here is a puzzle that (hopefully) has my intended solution ...