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Noita Eye Glyphs

A puzzle found hidden between the background layers of the computer game Noita. The puzzle has not been solved since it was added to the game in October of 2020. It is made of thousands of eye images, ...
codewarrior0's user avatar
  • 6,832
27 votes
0 answers
2k views

Is there a move-efficient way to rotate the center pieces on the Octo-Star?

I'm looking for a more efficient algorithm to rotate the center column of the Octo-Star puzzle 45 degrees. The situation below occurs when four properly-oriented edges are next to each other, ...
user avatar
25 votes
0 answers
2k views

Decrypting the Key: "Phage is Spreading.."

I've been trying to solve this puzzle called "Phage is Spreading.." ...
Coto TheArcher's user avatar
22 votes
0 answers
3k views

What does this mathematical operator do?

The solution to this puzzle is one I came up with when working on this puzzle: What is the answer of this math puzzle? For two natural numbers a,b, can you figure ...
PattuX's user avatar
  • 612
22 votes
0 answers
2k views

REALLY important days in history

@Z. Dailey asks a mathematical puzzle Important days in history... and to come! with a series of dates in years 1973, 1978, 1983, 1992, 2005. My puzzle asks the question: What is the previous date in ...
Haobin's user avatar
  • 11.7k
19 votes
0 answers
967 views

Alternate, complex potions puzzle from HP fanfic

A long narrow room. The entrance is blocked by purple flame, the path onward blocked by black flame. On a table, the only thing in the room, are two dozen potions in opaque bottles. Half green glass, ...
Asviloka's user avatar
  • 191
18 votes
0 answers
699 views

Determining the meaning of a challenge coin

I saw this rather cool looking challenge coin the other day, and I was wondering what the associated binary on the back of it means, as it isn't standard ASCII. In plaintext: ...
DeepS1X's user avatar
  • 281
14 votes
0 answers
650 views

Qubes: Oh, For the Love Of

TL;DR: This is a mixture between a tribute/spin-off puzzle and an attempt at a new puzzle type, greatly inspired by the notorious arcade game, Q*bert, published originally by Gottlieb Amusement Games. ...
Omicron Zed's user avatar
14 votes
0 answers
2k views

Crack the pigeon code

Can you crack this message? It was discovered in a chimney in 2012 attached to a carrier pigeon and was most likely sent during the D-day invasions. The GCHQ was not able to crack it, even after ...
user avatar
14 votes
0 answers
824 views

Grandma's keynote

Found this note which is addressed To my grandma, in her chest Since she's passed now, here's my quest.. What tickled her interest? And who invited her as guest?
OnlyF's user avatar
  • 2,565
14 votes
0 answers
1k views

How would this binary-ish code be translated?

...
RobustPhysics's user avatar
12 votes
0 answers
383 views

Can we find four identically colored numbers?

Take the positive integers {1, 2, 3, ...} and color them red, green or blue. Is it true that no matter what coloring is chosen, we can always find three distinct numbers x, y and z so that x, y, z ...
Will.Octagon.Gibson's user avatar
12 votes
0 answers
246 views

The Snake and the Hunter

The Snake and the Hunter is a game for two players who play in two rounds interchanging the roles of snake and hunter. The game is played in a rectangular grid of points, say 6×6. In both rounds the ...
Bernardo Recamán Santos's user avatar
12 votes
0 answers
887 views

Dissecting a figure into 2, 3, 4, and 5 parts but not 6

This figure is divided in 2, 3 and 4 equal parts of same size and shape, but it is not possible to do it in 5 equal parts of same size and shape. Is it possible to find a figure that can be divided ...
Rodolfo Kurchan's user avatar
12 votes
0 answers
1k views

Hidden message in rap text II: "Ya, a ray 'ave july joy!"

This puzzle is inspired by this one by @LukasRotter. Hopefully you don't mind me using similar (well, basically the same) format as yours, Mr. Rotter! ;) The same rapper released another teaser for ...
Jerry Dean's user avatar
  • 1,746
12 votes
0 answers
605 views

Found the key, but what to unlock?

Here's a series of text messages between me and my friend. Me: Couldn't use ebg13, so used ______ to hide my messages. Him: What? How is this possible??? Me: A big prime ______, what else did you ...
Someone's user avatar
  • 748
12 votes
0 answers
469 views

Quantum tic tac toe strategy

Most of us learn tic tac toe early in our life. Also, it is easy to find an optimal strategy for playing. How about Quantum tic tac toe? What is the optimal strategy for playing it? Rules On a ...
George Menoutis's user avatar
12 votes
0 answers
742 views

Meteor strikes again

Part of a phone call: -...well why didn't you just say so? -It wasn't as easy as you thought, Jack. All the power lines here were destro--- -I know...It's not like we're living on a different planet ...
Zero Pancakes's user avatar
11 votes
0 answers
338 views

Can you find the cipher that I used?

I have encoded a phrase, using a cipher that I invented. But I don't want you to decode it, rather I want you to figure out how my cipher works. This is the phrase that I encrypted Find the ...
H Franklin's user avatar
11 votes
0 answers
337 views

The Majestic but Draconian Dinner

We are hosting a dinner party. Here is a list of things you can take: Hotdog Grapefruit Oreos Potato Salad Cheetos Utensils Katlyn Predator Drones Banana However,...
Display name's user avatar
  • 2,260
11 votes
0 answers
327 views

An Attempt at AV Puzzle

Here's another puzzle with visuals and sound. I hope you enjoy it! With Sound: https://youtu.be/yHkQdEu0QpA Static Image (the musical notes represent the music in the YouTube video): Hint 1 Hint 2
Adib's user avatar
  • 812
11 votes
0 answers
403 views

What is a Freecell Word™?

This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Freecell Word™. Use the ...
hdsdv's user avatar
  • 5,190
11 votes
0 answers
514 views

April Fool's Enigma

Every year, a famous French youtuber (e-penser) presents his enigma of April Fool, but this year, targeting specifically a group of people who have done particularly well last year, he raised the ...
Alix Eisenhardt's user avatar
10 votes
0 answers
701 views

A funny looking cipher puzzle

What secrets does this jester hold? Hints are found down the road. A hint, or rather, that what is held transcribed:
Mark Marketing's user avatar
10 votes
1 answer
745 views

Powerful number systems

Imagine I have two positive integers, $a$ and $b$. Can you find the last digit of the sum $a+b$ given only the last digits of $a$ and $b$? More generally, can you find the last $n$ digits of $a+b$ ...
pregunton's user avatar
  • 461
10 votes
0 answers
506 views

I'm a number with a special product, so name me when you think you've got it

In the blocks that come before, their special product tells us more. To guess my scheme you'll need calculation, but only little tests of recreation. Each block contains atoms strong as Thor, ...
Galen's user avatar
  • 2,296
10 votes
0 answers
2k views

3D ring/rope wooden puzzle solution?

I have a Eureka 3d "Puzzle G":* The box lists 3 puzzles: Remove the ring Remove the rope Move the ring to the other side While I was able to solve shows the first puzzle, I haven't ...
karakuri's user avatar
  • 406
9 votes
0 answers
304 views

Dreamcatcher Puzzle

I created this puzzle as part of a set of puzzles about good wishes for a wedding. Does it work?
Anaphory's user avatar
  • 252
9 votes
0 answers
668 views

A nice riley, hopefully is fun

Within these lines is a puzzle I've made. With cunning and wit, can you guess my trade? Inside the tome of the element's power, One minute per side, you'll read for an hour. A single number of the ...
userbignumber's user avatar
9 votes
0 answers
348 views

12:41 puzzle: colorful geometry

The answer is a 4-letter word. I will not be giving any hints. This puzzle is very old. The puzzle is solved using only the image (no clues to the puzzle in title or description).
user avatar
9 votes
0 answers
357 views

A Glutton and a Split Check

N, T, A, B are arbitrary constants in this problem. I have only definitively solved the N=1 subproblem, so, if the general problem cannot be solved, I will be satisfied to mark as accepted a solution ...
Feryll's user avatar
  • 2,389
9 votes
0 answers
286 views

Rolling dice in a box

A box containing identical dice that were arranged to have same orientation has a missing die at the center (see figure). The dice moves to the free space for they can change orientation and ...
TSLF's user avatar
  • 6,656
9 votes
0 answers
686 views

Signatures of serial killer Edward Wayne Edwards?

This is from a real-life murder-mystery. In 2009 Edward Wayne Edwards was arrested and convicted of five murders, following a tip-off from his daughter April. Former detective John A. Cameron ...
George Barwood's user avatar
9 votes
0 answers
474 views

The highest poem

I am three, often a person, always a digit, and also witout. George POUST was his name. Manufactured by Ford between 1972 and 1976. YMCA was not my first team in my coaching career. Theory of ...
Enigma's user avatar
  • 2,831
9 votes
0 answers
289 views

Zed's Order: Breakfast at Elon's

My friend Elon and I constantly irritate each other. He recently built himself a rather respectable restaurant – a sort of bed-&-breakfast, minus the beds. Last week, he asked if I could ...
Omicron Zed's user avatar
9 votes
0 answers
488 views

What causes these signs to follow this relation?

Can you find why does the below relation hold true? Hint 1 Hint 2
19aksh's user avatar
  • 3,943
9 votes
0 answers
364 views

My drunken formula?

I know that today is an important day, but I can't remember why... All I have in my possession is this formula I wrote last night in my drunken stupor: You go here: $$B = 25 + \biggl(\frac{O}{...
Hazel へいぜる's user avatar
9 votes
1 answer
2k views

Is there another name for this puzzle? (Kyudoku, Nine Find)

Is there another name for this type of puzzle? I can only find two examples of it online: https://www.brainzilla.com/logic/kyudoku/ http://ninefind.com/ In the game you start with a 6x6 grid filled ...
Rory's user avatar
  • 91
8 votes
0 answers
448 views

Cookie Unionization

My Christmas cookies are gone! When I came into the kitchen this morning, the box was empty. All that remained were a few crumbs and this note: We absconded. You never saw that coming, did you? Well, ...
Lyra's user avatar
  • 400
8 votes
0 answers
277 views

Doubling the cube with rational Meccano strips

In three monographs published in 2006, 2008 and 2014 Gerard 't Hooft considered "Meccano mathematics": how to construct specified distances and regular polygons by a rigid system of ideal ...
Parcly Taxel's user avatar
  • 7,820
8 votes
0 answers
618 views

Connect The Wall-Words:

We have a group of 16 words here: ACIDITY TIME MICROSCOPE MARKS LIGHT SCALE CHEMISTRY CLAW REAL LEAD INTEREST BIOLOGY DUCK RADICAL ACADEMY LEAF Goal: Group these $16$ words into $4$ groups, each ...
Anonymous's user avatar
  • 1,754
8 votes
0 answers
423 views

An Evil Cartesian Psycho

I came up with this puzzle when I was in high school. There is an island owned by an evil man who keeps some tourists who were visiting the island a few years ago captive. The authorities demanded ...
Pspl's user avatar
  • 2,272
8 votes
0 answers
226 views

There are 49 cards here. Figure out what the seven facedown cards are and what position they're in

So here's the problem "There are 49 cards here. Can you figure out what the seven facedown cards are and what position they're in?" I have tried about everything in my math tool belt to try ...
Gabriel Horn's user avatar
8 votes
0 answers
554 views

Ode to a Nightingale: a puzzling study in literary criticism

The field of literary criticism is an interesting and fruitful one, in which puzzlers might carve out a niche. This was recently brought home by a conversation I had with a sagacious old gentleman in ...
Anon's user avatar
  • 5,430
8 votes
0 answers
529 views

Impossible Cipher v1.0

When I create riddles, ciphers etc.. they seem to get solved within only a couple of days of writing. Well no more! This cipher may not be impossible but is extremely difficult. If left unsolved for ...
William Pennanti's user avatar
8 votes
0 answers
341 views

We found text from the year 2040!

Recently, the first surviving examples of text from the ███████████████e discovered! The unearthed artifacts included a collection of rectangular tablets inscribed in the hitherto unknow███████████████...
atenao's user avatar
  • 181
8 votes
0 answers
198 views

Is it possible to create a knot that is locked only when the rope is stretched?

Is it possible to create a knot that is stable/locked when the rope is stretched? When the tension is relived the knot should open.
Superluminal's user avatar
8 votes
0 answers
670 views

How to Complete this Cryptographic Challenge?

This question is from a CTF that a company (EY Cybersecurity) did almost a year ago. The original website is no longer available. ...
2shy2sayHi's user avatar
7 votes
0 answers
165 views

Logic and geometry problem 2

My question is whether or not a deadlock can occur in Crisscross. A deadlock is defined as a position, an arrangement of checkers, in which the board has been filled but neither player has won. ...
Mark Steere's user avatar
7 votes
0 answers
305 views

Where are you according to this riddle?

Go forward, and you'll arrive back. Go back, and you'll arrive back. Go west and you'll come from the east. Go east and you'll come from the west. Jump once and you black out, jump twice and you're ...
user110391's user avatar

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