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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Roman Empire goes to space
Here is the binary part for convenience:
01110010
10000000
10011111
10110111
Find what celestial objects has Roman Empire visited.
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A Problem in Research using Logic
Here's a problem of my own design. You are researching 5 papers done in your field in order to guide your next paper. Some papers may have had a bad study design, used faked data, or otherwise would ...
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Python Conundrum: Guess The Song
Python Conundrum: The Series
The key to the puzzle:
The puzzle:
...
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Techno-Culinary Brain Teaser: Unravel the Code in the Kitchen
The answer is one word.
The rebus:
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Mexican Standoff -- 4 way
You and 3 others are being held captive by the Great Leader and will be forced to engage in a 4-way shootout. The last one standing will be set free and the top priority for all involved is to go ...
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Figure Out The Language: Min
Imagine there is a programming language in which you can only evaluate expressions. Expressions have operators and constants.
There are three types of constants.
Numbers - Any number from 0 to ...
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1
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Java: Make a cast which is necessary at runtime, but not at compile-time
This is based on a very unusual behaviour of Java I recently found while implementing a personal project. It requires a very good understanding of Java and some knowledge of its standard library, and ...
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Decipher a long sequence of numbers
51699624576811268526783109824167925197245652924177251787241782538786302873119768312852668312686625268245686752824473216878253830287925175273039778250852831287672527245665263006725397251762529312811498
...
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Colliding Bullets again
Here's a colliding bullets problem of my own devising that's different from previous versions. Every second a gun has a 60% chance of firing a bullet in a straight line. After 10 seconds there would ...
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1
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Reversing a binary string with a restricted Turing Machine
Some malevolent entity (me) asks you to construct a Turing Machine which, given an input on its tape of the form $LbR$ where $b$ is some binary string, changes this to $Lb^{-1}R$ then halts (where $b^{...
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Am but not equal
I am myself, but I am not equal to myself. What am I?
Hint:
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Why did it crash?
You are on your computer on June 23rd, 2021 at 10:24:58 am, when it suddenly becomes bricked. Your electronic devices all fail, except for your newest technology. Why?
Hint 1:
Hint 2:
This didn't ...
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Warning!! We need to rescue Mr. Greg
Greg, our Server Security Admin, was locked up today in his own Server Room. (Yeah, quite crazy I know). The guy had forgotten the password to unlock his door. Fortunately he had saved the password on ...
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Do I still have time?
My boss told me he had something important to tell me, that I needed to read by the end of the day.
I told him I was on it. See, I didn't want to admit I was "Working From Home" from the ...
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Four 3x3 semimagic squares in a 5x5 grid
Can you place every number from 1 to 25 in a 5x5 grid such that it contains four 3x3 semimagic squares? A semimagic square is a square whose rows and columns all sum to the same number. This is ...
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Ernie and the Chance to Save a Beautiful Relationship
I should have smelt a rat when Ernie invited me to an event at the local club rooms, because when I asked why his wife was not attending, he replied that she had another engagement for that night. “I ...
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More bits the merrier
The computer department at Puzzled State University devised an inefficient
bit-based
(zeros and ones) number system, n',
for their ever more bit-happy machines.
...
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I am an 100 letter word, who am I?
I have been watching you.
From the moment you were first conscious, I have been watching;
Until the last time you lose consciousness, I will be watching.
I am always by your side, witnessing you.
...
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Solution for Robozzle puzzle no 291 - Huh? Part 2
I want to solve Robozzle puzzle number 291 - Huh? Part 2.
You can see it raw in the image below. You need to collect the stars without falling out of the given grid. You are the rocket on top-left ...
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3
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682
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1000 digit sum calculation puzzle
I have 7 numbers that add up to the same value as the sum of the base 1000 digits of the product.
Here are the numbers:
86, 203, 296, 395, 401, 407, 913
The first part of the puzzle is to understand ...
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4
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Shorter solution for Robozzle puzzle no 132 - Split
I wonder a shorter solution for Robozzle puzzle number 132, "Split."
Puzzle is shown below. I have solved it but I'm wondering shorter solution for this and there many exist.
Basically, the ...
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1
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Using sentence, turn intense into incense; what tool do I need?
Puzzle
What tool do I need to turn intense into incense, using sentence?
The same tool can turn dated into demented, using statement.
Hints
(Kudos: the accepted answer was published before the hints.)...
8
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4
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How to make gifs showing a puzzle's solution process?
I've been repeatedly asked to turn this into a PSE question, so here goes.
Some people may have noticed that, when I answer a grid-deduction question, my answer often includes, as well as a step-by-...
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Parϯner up and find the imposter!
Messenger,
Our 5 top agents ѡill sօon arrive in diಽguise for the big meeting this weeĸ, and each has provᎥded their credentialઽ, but we've just received word one may be an imρostеⲅ sent by ouᴦ enemies....
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238
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Is Connect X a solved game?
Connect 4 is known to be a solved game.
After Connect 4 is Excellent, Connect 3 is Great being trivialised by @Trenin, I am introducing the final puzzle I wanted to share to puzzling.SE :)
Connect X, ...
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Someone else's Machine Learning tutorial code
This puzzle was inspired by some tutorial code I downloaded from someone else’s GitHub. To protect the guilty, I have withheld the author’s name, paraphrased the relevant Python into pseudo-code and “...
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2
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416
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The Empty Cube (Interactive Puzzle)
I've made an interactive 3D cube puzzle in CSS, The puzzle is fully solvable from the images below, but the fully interactive version is here: https://codepen.io/chengarda/full/RwyKvwz
The empty cube ...
- 3,596
3
votes
1
answer
373
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Largest word tree
I was inspired by this awesome puzzle. Here is an image of a word tree borrowed from there:
In a word tree every path from the root to the leaves must form a distinct word. The size of the tree is ...
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1
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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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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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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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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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3
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▉ ▎▊ ▐▎ ▋█ ▐▉ ▋█ ▐▉ ▎▊ ▐▎ ▎█ ▐
(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:
...
7
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1
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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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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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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 (<...
user78980
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1
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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 ...
user78980
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vote
2
answers
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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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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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Maximize my flags - 2x2 version
As Maximize my flags was not solved to optimality by the community (perhaps because the coding required was too harsh), I present to you Maximize my four flags.
The rules are exactly the same as in ...
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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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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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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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2
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642
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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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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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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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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).
