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.
308
questions
6
votes
4answers
269 views
What is my name? It's not “traveler”
The answer to this puzzle is my first name. What is it?
If no progress is made after a week or so, I'll slowly give hints. It's not too hard of a puzzle, so long as you take everything into account.
...
10
votes
2answers
1k views
sorting 4 numbers using Min - Max boxes
Min-Max is a box that is capable of determining which of the two numbers is the higher (Max) and which is lower (Min).
I need to use minimum amount of boxes in order to sort 4 different numbers (any ...
0
votes
1answer
157 views
Find the 33rd two characters, and where they belong
I'm working on a puzzle. I'm about 75% of the way through solving the puzzle.
The only thing left is you hash 33 two character pairs. I have 32 two character pairs.
Possible characters are [a-z, ...
8
votes
6answers
818 views
Restoring order in a deck of playing cards (II)
Michelle has a deck of 52 playing cards in a pile with their backs facing up. She takes the first 2 cards in the pile, turns them over, and places them at the bottom of the pile. She now takes the ...
13
votes
3answers
2k views
Restoring order in a deck of playing cards (I)
Michelle has a deck of 52 playing cards, stacked in a pile with their backs facing up. She takes the first 2 cards in the pile, turns them over, and places them at the bottom of the pile. She now ...
2
votes
1answer
118 views
The “Jumbled” Cipher
The elusive "Jumbled" cipher has stumped scientists and cryptographers alike...
Not really, but it will stump you soon...
The Jumbled Cipher is a mysterious text cipher that puts text into an ...
19
votes
2answers
496 views
The Sequencer - da-da-daaa!
This is what the diagram on the machine looked like:
And this is the output that was in the box.
...
3
votes
2answers
145 views
The fantastic matrix
Here's another question that I have been asked in an interview lately.
Let $M$ be an $n × n$ matrix whose values are $”+”$ and $”-”$. M is called fantastic if it is possible to make all it's values $”...
17
votes
2answers
503 views
Maximum Height of a Hotel with Strange Elevators
I encountered this puzzle many years ago, and I think back on it often as it is unique and thought provoking. As far as I know nobody has proved the given solution as optimum, so it may still be ...
19
votes
4answers
754 views
Consecutive integers around a circle
Find a block of positive consecutive integers that can be placed around a circle in some order so that any two adjacent numbers always have a common divisor greater than 1.
2
votes
1answer
102 views
Pairwise coprime numbers in a 3 x 3 board
Find all the ways of placing all the digits 1 to 9 in the cells of a 3 x 3 board in such a manner that the seven three-digit numbers that can be read horizontally (from left to right), vertically (top ...
2
votes
0answers
148 views
A partition of 79633 into thirteen parts [duplicate]
The sum of thirteen positive integers is 79633. If placed appropriately on the vertices of this graph, two of them will be joined by an edge if and only if they have a common divisor greater than 1 (...
9
votes
1answer
252 views
Scoring Oracle: Bob easily wins, but how much?
Bob meets a magician with two bags and a chest on a bridge. The magician challenges him with the following enigma:
Here is a bag A, holding 5080 pebbles.
Here is another bag B.
Most of the pebbles ...
7
votes
3answers
217 views
A 4 x 4 Magic Square with Pairwise Relatively Prime Entries
Find a 4 x 4 magic square of positive integers such that any two of its entries are pairwise different and relatively prime, i.e., have no common divisor greater than 1.
What is the least that the ...
8
votes
2answers
229 views
From one color to another
white turns to blue
blue turns to red
red turns to aquamarine
but green stays the same
People from StackOverflow might appreciate this one.
12
votes
5answers
546 views
Labelling a Snow Flake Graph to Attain Minimum Sum
Label the vertices (or nodes) of this graph with positive integers so that any two nodes are joined by a edge (or line) if and only if the corresponding integers have a common divisor greater than 1 (...
16
votes
6answers
532 views
A regular riddle
I'm kept inside a boxy cage.A prefix for the modern age, I make the
messages you create fly at a supersonic rate.
Now that box has me and my friends inside a box with rounded ends. You
can ...
1
vote
2answers
126 views
A Fun, Fantastic, Phonic Cipher!
An old friend of mine recently sent me an email. Being a linguist, he always finds creative (read: annoying) ways to use his words to baffle me. After about five minutes, I usually just give up. ...
0
votes
1answer
166 views
One-word riddle (possibly python)
The question/riddle is: "Never has a snake given such words of wisdom."
The hint is: "Thou shall never pass errors silently!"
It is possible to be related to Python, errors or something like that. ...
8
votes
3answers
1k views
What date encoding could this be?
40 years ago I read a book, but couldn't remember the title. I've been looking for it for a while, and I finally (finally!) found it!
And then I worked out why it took so long. It hasn't been ...
7
votes
1answer
202 views
Can you give us a statement?
Picture an 11x11 grid. Each cell must contain one character. This can be any ASCII character. The contents of the entire row must validate against both corresponding H regex clues. And the contents of ...
10
votes
3answers
572 views
Where is the money?
When I was just a little kid my parents died in a terrible accident, and I was left alone in the world. When I reached the age of 18, I received an envelope with a letter that read the following:
...
7
votes
1answer
121 views
Statements in Java
Each code block translates to a specific statement in English. There is a theme behind the statements. As code puzzles tend to be "easier" (relative to other PSE puzzles) than expected, it will not be ...
4
votes
1answer
101 views
question of royal proportions
I dont know if this is going to be any good but this is my first attempt at on of these puzzles.
The following piece of code relates to a famous saying/phrase/article/piece.
...
3
votes
1answer
253 views
Applied logic challenge problem #2
This is similar to my previous Applied Logic Challenge Problem but with a significant difference at the end which could make this problem somewhat more difficult. Again it is a problem of my own ...
4
votes
2answers
204 views
Applied logic challenge problem
You must determine what can be concluded from the 60 true statements below. The numbers in each statement represent binary values (true / ...
7
votes
1answer
300 views
An Artwork Made from Several Countries
Last year I went to 12 different countries around the world. I made an AI to convert every country that I've visited into a beautiful artwork as a reminder. I input the 12 countries name, then somehow ...
-1
votes
2answers
368 views
What's the Difference?
*not sure if this counts as a real puzzle, but I will ask it anyways.
Can you catch the difference between the 2 following letters?
х
...
9
votes
1answer
254 views
Puzzles like Sokoban?
I am looking for some puzzles like Sokoban or 15-puzzle but more difficult to solve and satisfy the following requirements:
The number of possible moves at each step should be limited, let's say < ...
-3
votes
1answer
83 views
You see me right now… but you can't
Look over here! Oh... that's right. I'm too small to be seen. But you are still looking at me. Crazy! I know right? Here, how about this? You guess what I am! Okay.
Well if I get too much ...
19
votes
3answers
464 views
Ornithogenic Turnover
Peptiberg: Hello, friend. Why do you look so pleased?
Tippgeber: My friend just had a change of profession - from a divisive one to a constructive one.
Peptiberg: Was it a smooth transition?
...
31
votes
3answers
2k views
Mysterious Flash Drive
First puzzle I ever do! Hopefully it won't be too easy or too challenging.
My co-worker just gave me a USB flash drive, which was supposed to contain a couple files of code for me to review. ...
8
votes
2answers
368 views
The “foo” encoding
This puzzle has been solved. Please skip to the bottom of this question for the answer.
Introducing the mysterious foo encoding... based on the common computer programming template variables ...
4
votes
1answer
176 views
What does one do to decrypt this?
'Encrypted': 10101110001011101000000001110111000101011100011101110000000011101110100010111000111010111011100
Context: This is simpler than you think. So simple the solution to this problem would be ...
8
votes
1answer
206 views
Once again, another Linux movie quote!
Because I can't get off this linux movie quote train, here is another one! Can you find the famous movie quote hidden in this linux block?
...
12
votes
2answers
1k views
Yet another movie line on the Linux terminal
What famous quote does the following terminal session refer to?
$ ps -o ppid= -p $u
28342
$ echo $$
28342
11
votes
3answers
5k views
My co-workers left me a message
While refactoring a massive chunk of old code, I found a rather curious section of code commented out that wasn't there the day before. Can you tell me what it means?
...
9
votes
1answer
500 views
Yet another movie quote hidden in Linux
Inspired by this question and this question, can you guess the famous movie quote hidden in this Linux block?
...
13
votes
1answer
1k views
Another Linux movie command
Inspired by this question, here's another Linux command representing a famous line:
cp -a ~she ~
Which line is it?
36
votes
1answer
4k views
2
votes
3answers
345 views
Coding puzzles with pen and paper
At work we are doing a coding competition on hackerrank – it is real coding – you are given input and you have to code a program that produces the correct output.
Now, I would like to promote this ...
2
votes
1answer
128 views
Where is my brother?
Couple days ago, my brother went missing.
It seems like he's ran away from home.
I decided to search his computer, to see if there are any clues to where he might have gone.
All I've found was this ...
11
votes
3answers
2k views
2
votes
1answer
148 views
Breaking into your friend's computer
You're trying to break into your friends laptop.
However, his computer is password protected.
Luckily he has a password hint on his computer.
The password you are looking forˏ is not easy like ...
4
votes
1answer
151 views
Where is my coworker from? [duplicate]
My new coworker sent me some code. He wants me to figure out where he was born. I believe there are some hints within the code, but I cannot figure it out. Here is the code block:
...
1
vote
3answers
151 views
Looking for a place
Seems overwhelming but pretty simple.
clue.txt
http://junewi.000webhostapp.com/testing/clue.txt
tdHCR6ieFHNqUv1zQHE0KRiAfypNTApKi2xlN4CMYK2beP3M1u2mgUvRvDmx0M8heyKebUVEsGcbHrnymUIeviUN/...
9
votes
1answer
369 views
First Cryptography Puzzle
When adam and eve sinned,
apple was the key.
Lies of the Serpent,
they both believed.
Alternate:
56 108 87 97 119 53 97 43
57 49 68 105 66 51 121 115
84 54 120 51 81 65 61 61
I'm looking for just ...
4
votes
3answers
203 views
Critters Ate My Clue
I recently visited a rummage sale at my local community college, which was trying to get rid of a ton of old and outdated equipment in storage to make way for a new Makerspace. As I browsed through ...
4
votes
0answers
111 views
Honda tutu del moto - Words which say something
You find a paper lying on the sand. Does it mean something ... an imgur maze, maybe ?
Cultures reserve glasses. Twin economists migrates with tails in a fine risk. Conglomerate ... voo dun saga ...
6
votes
2answers
183 views
Mathematical formulation for Dr. Eureka
I have to prepare an algorithm to solve the puzzle part of Dr. Eureka, a multiplayer game from Blue Orange Games. This is part of a research project that also involves computer vision and robotics. ...
