Questions tagged [computer-puzzle]

A tag for puzzles dependent upon some degree of computer literacy - for instance, requiring basic familiarity with operating system usage, encryption or programming.

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A rebus puzzle describing a name

This is a rebus puzzle describing a singer's name. This puzzle will still be pretty straight-forward, though you really need a little knowledge in programming this time... ...
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-2 votes
1 answer
208 views

A rebus puzzle consisting of four characters

This is a rebus puzzle consisting of four characters. The puzzle is very simple if you're knowledgeable enough. Given four characters, guess two words: ΔΕὖ% The first word consists of 5 basic Latin ...
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7 votes
1 answer
729 views

Rebus puzzle with four colored bars and diagonals between them

This is an extremely simple rebus puzzle, the answer is extremely obvious if you know where to seek, you only need some lateral thinking, and maybe some basic programming knowledge. To make it even ...
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7 votes
1 answer
361 views

What is the encoded message?

I created the puzzle by myself. Encoded Message Examples Hello World Hello, World! Python Hints: I made another image to illustrate the encoding better (all the images were generated by a Python ...
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30 votes
3 answers
9k views

▉ ▎▊ ▐▎ ▋█ ▐▉ ▋█ ▐▉ ▎▊ ▐▎ ▎█ ▐

(I created this puzzle myself) I was shopping for groceries the other day, and I found an item that was in an unlabeled, uncolored package. In fact, the only thing that was on it was this barcode: ...
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6 votes
1 answer
228 views

Follow the randomly-bouncing ball

We are going to generate information out of nothing (well, nothing and a bit of something) just by randomly bouncing a ball. The result will be a message you can use to protect humanity. Let's use ...
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  • 10k
4 votes
1 answer
213 views

Sea of Sounds - A study on noise

(Author Note) A while ago I made some puzzles for a now defunct puzzle hunt project, here's one of them. The answer to this (and most other puzzles of said hunt) is a single word. The puzzle itself is ...
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  • 5,474
5 votes
1 answer
417 views

What symbol do the images represent?

These are two images representing the same symbol, the first image contains 25 blocks in 13 colors, it represents progression of its different states through time since it was initiated n years ago (<...
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5 votes
0 answers
377 views

I have a message

I have an encoded message and I want you to find out what it is. For the answer to be accepted, you must clearly demonstrate and explain each step in the encoding process. The message contains four ...
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1 vote
2 answers
249 views

4x4 grid with the shortest longest path

This is an extension of this beautiful puzzle. This time your task is to find the hardest 4x4 grid. In particular, find a 4x4 grid containing every number from 0 to 9 at least once, such that the ...
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6 votes
2 answers
497 views

Find out the longest path being alive [closed]

Start from any integer. Move horizontally or vertically (not diagonally), and if you come across the same integer more than once you will die. Moving diagonally is not allowed. What is the longest ...
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  • 163
2 votes
0 answers
117 views

Maximize my flags - 2x2 version

Because Maximize my flags was not solved to optimality by the community, perhaps because the coding required was too harsh, I present you Maximize my four flags. The rules are exactly the same as in ...
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  • 5,557
3 votes
2 answers
331 views

Minimum rectangle inside of city skyline

This is a computer science riddle with a really beautiful answer! You are given as input an array of integers, representing a city skyline. Your goal is to find the rectangle of maximum area within ...
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  • 155
12 votes
2 answers
1k views

Can a fair coin be used to simulate an arbitrary weighted coin, with on average only two flips? [duplicate]

This puzzle was told to me by a Stanford PhD student in a graduate course on randomized algorithms. It's really clever/beautiful, and I think makes for a great challenge. You are given a fair coin, ...
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  • 155
2 votes
2 answers
355 views

What is a gksrnrdj 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 gksrnrdj Word™. Use the ...
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10 votes
2 answers
590 views

Find the secret in this image

Try to find the secret hidden inside this image. Discovering one part of the secret may lead you to the starting point of another part. And so on. It may look like an endless loop ...   ... or is it? ...
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1 vote
1 answer
190 views

How does this program work?

I have coded a Python program. Here's the example of my inputs and outputs: |Input |Output | |-------------|----------------| |wcf4# |'gpiyR' | |rekvof |"l`'-l\...
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  • 157
17 votes
4 answers
1k views

PSE Advent Calendar 2021 (Day 2): A Christmas Tree for broke Nerds

This puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door > Question: ...
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  • 7,998
9 votes
0 answers
272 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).
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4 votes
1 answer
129 views

Copy that solution

This copy machine program prints the solution to a well-known puzzle.  Explanation of the syntax will follow. What solution will be printed for which well-known puzzle?  EXECUTION CODE .--> ...
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  • 21.4k
2 votes
2 answers
167 views

How can I create a programmatic solution to a formation of numbers problem?

There is a common formation-of-numbers puzzle in which the solver is supposed to take predetermined collection of numbers, permitted operators, and a desired result; then perform mathematical ...
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1 vote
0 answers
155 views

I need help deciphering what looks like a binary message

I was watching a YouTube video and it’s filled with secret messages and codes. The last two codes were in binary and inserting them into a translator provided correct answers. However, that's not ...
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4 votes
1 answer
663 views

Guess the algorithm

Here you are seeing part of a pattern I created with my computer. Can you either reproduce it or describe the algorithm I used?
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  • 12.2k
4 votes
1 answer
392 views

This rebus is gold (and loud)

What television programme does this rebus stand for? Why is the rebus gold* and loud? ...
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  • 3,681
20 votes
1 answer
2k views

Pythonic Purity Puzzle

You are looking for a ten-letter word. Perfection is displayed not when there is nothing left to add, but when there is nothing left to take away. ...
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6 votes
1 answer
766 views

What's the last number in my wordy number sequence?

I have a wordy number sequence, partially shown below: $ {1, 45.2548, 1262.6650, 32768, 390625, 10077696, 282475249, 3037000499.976, 31381059609, ... }$ Can you find the last number in the sequence? ...
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  • 1,215
10 votes
2 answers
2k views

No Time to Die, Period

Inside MI6's server farm in the middle of the night, the operator's eyes skittered frantically over an intercepted message: The development of our new APG code has been coming along nicely; I've ...
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  • 3,681
5 votes
2 answers
446 views

My special animal

The answer to this puzzle is an image not hosted on Imgur. The image host and the ID of the image on that host should become clear when solving the puzzle. (SVG source of the above) Exact coordinates ...
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  • 3,681
2 votes
0 answers
310 views

Here's the song, now tell me the title!

You ever have it happen where you know how a song goes, but you forget its title? I've heard you guys are good at figuring stuff out for free, so I'll just drop some notes here and let you guys do ...
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  • 1,768
6 votes
1 answer
699 views

The teacher's favorite animal

A student asked our teacher about her favorite type of dog during a distance learning meeting. She uploaded the image shown below, said it's our homework to figure that out, and left the call. What's ...
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  • 7,998
4 votes
3 answers
258 views

Create a folder using only the mouse [closed]

You are a programmer, you are on your way home from your boring work when suddenly a psychopath hits you on the head, kidnaps you and brings you to their secret den. You wake up in a dark room with ...
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  • 4,733
5 votes
1 answer
265 views

A brain[expletive] sudoku

This is a Sudoku that is also a Brainfuck program. The standard rules of Sudoku apply. The same symbol can not appear twice in the same row, column, or 3x3 box. The grid should also form a functioning ...
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  • 617
1 vote
3 answers
235 views

Test of Pentominoes

These are pentominoes, with letter codes: Create 4 yes/no questions which uniquely classify each pentomino. Examples of such questions are: Does it have rotational symmetry? Does it have reflection ...
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5 votes
1 answer
249 views

Looking for Navigators for the Famous Vega Classic

Do you have what it takes to compete in the famous Vega Classic? Looking for skilled navigators. Apply below. You have a craft that is capable of 10m/s$^2$ acceleration in any direction, and we're ...
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  • 22.3k
8 votes
3 answers
2k views

When should this question be answered?

If you hover your mouse over the time marked in the right-bottom corner of this post, then you will see a string showing the exact time that I post this question, which reads ...
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  • 6,977
3 votes
1 answer
205 views

The Burnt Textbook

You and your team have successfully intercepted a message from the enemy, which could win you the war! But the message is encrypted with a difficult cipher, and your textbook's instructions for ...
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  • 33
13 votes
3 answers
454 views

Two integer sided equilateral triangles with integer distances

In this figure with two non-congruent equilateral triangles and three-fold rotational symmetry the distance between any two of the 6 vertices is an integer. Can you give a solution? I know only one ...
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9 votes
1 answer
198 views

Scrabblescrapers

An entry in Fortnightly Topic Challenge #48: Unusual tag mix In this puzzle, you are given a 5x5 grid that you need to populate with a word square, so that the rows and columns form words (as defined ...
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  • 23.9k
6 votes
1 answer
256 views

Foo Clue and Who?

A simple puzzle I thought of during a work-from-home-session today. Enjoy :)
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  • 6,569
6 votes
1 answer
523 views

Stop the robot by changing value of variable Z

You're a computer security expert (i.e a hacker who doesn't break law). Your neighbour is infamous professor MacGoofy himself. He specializes in designing programming languages and programming ...
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10 votes
4 answers
446 views

Not so boring numbers

This is inspired by this and this and more similar ones. Let us consider formation of a given positive integer N by the following rules You may use only one digit, which one is your choice and you ...
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  • 10.1k
0 votes
4 answers
1k views

mmm mmmmmmmmm mmmmmmmmmmmmmmmm mmmmmmmm mmmmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmm

mmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmm mmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmm mmmmm mmmmmmmmmmmmmmmmmmmm mmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmm mmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmm ...
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  • 2,114
12 votes
2 answers
441 views

A fraction puzzle

This is a puzzle with both the computer-puzzle tag and the no-computers tag. We have the following list of five fractions: $$11/5, 30/77, 1/11, 21/2, 5/7.$$ Starting with an integer $x$, we perform ...
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  • 6,977
-1 votes
1 answer
275 views

Double trouble (Python)

Here's a Python program I like to call an Exam Code Generator ...
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6 votes
1 answer
236 views

7-QWERTY-distance words

My previous puzzle The QWERTY-shortest word was solved nearly instantly by the effective puzzling community. I also believe it is because the main parameter of the puzzle 4.7 was not perferectly set. ...
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  • 5,557
9 votes
2 answers
446 views

Maximize my flags

You are given the next list of 48 flags. For each pair of flags that are side by side, you score 1 point per color they share as a frontier. For instance France and Finland score 1 point thanks to ...
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  • 5,557
7 votes
2 answers
417 views

The QWERTY-shortest word

For this puzzle, I define the distance between two letters as the shortest way on a QWERTY keyboard to go from a letter to another with a path. Examples: Q and W are seperated by a distance of 1. 2 ...
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  • 5,557
-1 votes
3 answers
546 views

Ted's answer had Thomas shocked! "He... he's alive..." he realized

There's this built-in python module, we'll call it mystery. Now, mystery has this function, we'll call it ted. Also, mystery has another function, we'll call it jan. Finally, lets bring Thomas into ...
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2 votes
1 answer
151 views

Messed up function needs uncovering!

You spent 5 hours to make a simple function that takes in a number, and it will print out a grid with the given number as each of its dimensions. Each square of the grid will have a single circle in ...
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3 votes
2 answers
225 views

Magic rotated checkerboard function made in python!

Here's a puzzle for all you python programmers out there: I defined a function that goes like this: ...
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