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.
450
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Tiling rectangles with N pentomino plus rectangles
Inspired by Polyomino Z pentomino and rectangle packing into rectangle
Also in this series:
Tiling rectangles with F pentomino plus rectangles
Tiling rectangles with T pentomino plus rectangles
...
- 28k
12
votes
1
answer
451
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Computational Linguists
An entry in Fortnightly Topic Challenge #35: Restricted Title 1.Computational Linguists
In order to help me boost my paltry grades, the professor of my computer class has given me an extra credit ...
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33
votes
25
answers
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I shouldn't have asked him
My roommate (rm) always looks busy in front of his laptop, so I try to start talking to him
Me : "Hey, You always look busy, so how do you entertain yourself? Do you have a favorite book, movie,...
CommunityBot
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votes
1
answer
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Permutation At A Railway Track
Engines numbered 1, 2, ..., n are on the line at the left, and it is desired to rearrange(permute) the cars as they leave on the right-hand track. An engine that is on the spur track can be left there ...
- 373
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votes
2
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20 right isosceles triangles into a square
Similar:
Unlucky tiling: Arrange thirteen right isosceles triangles into a square
Five graded difficulty isosceles right triangle into square tilings
Two difficult "Seventeen right isosceles ...
- 3,978
2
votes
2
answers
208
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Two difficult "Seventeen right isosceles triangles into a square" tilings
Similar to:
Unlucky tiling: Arrange thirteen right isosceles triangles into a square
Five graded difficulty isosceles right triangle into square tilings
V.hard problem, 20 right isosceles triangles ...
- 3,978
5
votes
2
answers
275
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Five graded difficulty isosceles right triangle into square tilings
Similar to:
Unlucky tiling: Arrange thirteen right isosceles triangles into a square
Two difficult "Seventeen right isosceles triangles into a square" tilings
V.hard problem, 20 right ...
- 3,978
6
votes
2
answers
293
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Challenging 15 rectangle tiling problem
This will test you, a computer will definitely help. Just one set of $1:2$ aspect ratio rectangles this time, but $15$ of them. Short side only is listed. The challenge is to arrange them into a ...
- 3,978
9
votes
2
answers
304
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Tiling rectangles with T pentomino plus rectangles
Inspired by Polyomino Z pentomino and rectangle packing into rectangle
Also in this series:
Tiling rectangles with F pentomino plus rectangles
Tiling rectangles with N pentomino plus rectangles
...
- 28k
9
votes
6
answers
1k
views
Optimizing month abbreviation to number
(This comes from a real-world requirement.)
The idea is easy - if you have the three-letter abbreviated name of a month, say "Jan", get the numeric month number (for "Jan", 1). Sure, sure, pick a ...
- 41.7k
15
votes
8
answers
1k
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High and low rebus
What may the following represent?
$\large\underline{US}$
$\large01100111$
$\large00\Large\color{green}\bullet$
The 3 rebuses give 3 proper nouns. They are in alphabetical and ...
- 1,533
6
votes
3
answers
432
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Tiling rectangles with X pentomino plus rectangles
Inspired by Polyomino Z pentomino and rectangle packing into rectangle
Also in this series:
Tiling rectangles with F pentomino plus rectangles
Tiling rectangles with N pentomino plus rectangles
...
- 28k
22
votes
3
answers
8k
views
Wife can't figure out husband's secret account password
John and Jane are married and keep a joint account at ABC Bank. They agreed that all of their income should go into the joint account. In early 2014, John started a new job at a software company, ...
CommunityBot
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10
votes
2
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Troubles with a Rogue Circuit
Edit : Made the final step to the solution easier to solve, also added hint.
I’m not quite sure what’s happening over here, but I believe you guys might be able to help.
I started noticing ...
- 17.5k
11
votes
2
answers
717
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Unlucky tiling: Arrange thirteen right isosceles triangles into a square
Link to next puzzle in this series:Five graded difficulty isosceles right triangle into square tilings
Two difficult "Seventeen right isosceles triangles into a square" tilings
V.hard ...
- 3,978
11
votes
1
answer
528
views
Conway's Siege of Life
They are immortal and they are killing us. We may not be able to kill them, but we might be able to keep them occupied, distracted, for eternity. But we need to figure out how. Before there are no ...
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3
answers
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Lego brick towers
Disclaimer: I'm honestly not sure whether this question is best placed at Puzzling, Maths, or Programming SE, but I'm interested in the best solution, and I'm sure mods will shift the question around, ...
- 101
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votes
3
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It usually is bigger, and comes with a certain lock. What is it?
What is this poem about?
I only have it once
most of you do too
It's easy to imagine
how I could have a few
It usually is bigger
and comes with a certain lock
But it's smaller ...
- 70.5k
8
votes
3
answers
1k
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Easter egg puzzle
A friend of mine sent me a puzzle which has eggs labeled with numbers 76 95 228 361 158 171.
The puzzle is asking, which egg doesn't belong in the nest.
All of the eggs have different colors too which ...
- 17.5k
7
votes
2
answers
992
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A partition of 1000 into six parts with least and greatest product possible
Find six positive natural numbers, not necessarily distinct, whose sum is 1000 and which, if placed appropriately on the vertices of the following graph, two of them will be joined by an edge if and ...
- 1,949
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votes
7
answers
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How can 1+1 give 10 and 11?
Just a quick, easy sum to pass the time for those at work.
This was used as an exercise when I did a programming course to outline the importance of thinking outside the box. It was also used to ...
- 6,865
6
votes
1
answer
595
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What is your best friend Jake trying to tell you in his email?
You and your best friend Jake always walk two miles to school together every day. On one particular day, when you leave for school, you realize that your friend isn't there. Thinking that he's ...
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1
vote
1
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What Famous Idiom Does This Small Code Snippet Represent?
Inspired by his previous discovery, the lazy software engineer decided to look for more interesting snippets in his company's code repository. After searching for a while, he found this one:
...
- 257
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votes
1
answer
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What phrase does this program rebus represent?
A lazy software engineer was recently browsing over the source code in his company's code repository (Because he was bored of reading puzzles on Puzzling.SE) when he found the following source code:
<...
- 257
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votes
3
answers
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A riddle to make a channel queasy
An accidental discovery of mine, this groan-worthy riddle is answerable with a single character when posted in a Slack channel:
What governs the level of disease?
As this is my first riddle here I'...
- 366
23
votes
6
answers
2k
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Ask me this, what's my job?
My friend was talking to me about his profession and what he did for a living and I was a bit confused about what it all entailed. When I finally got fed up and asked for clarification about what he ...
- 468
8
votes
1
answer
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IBM Research Puzzle – 5-ops implementation of erasure code
I found this interesting puzzle on IBM Research Puzzling Page called Ponder This; specifically, here.
Design a storage system that encodes 24 information bits on 8 disks of 4 bits each, such that:
...
CommunityBot
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votes
2
answers
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decipher RGXWSTLSQLITL where (ABCDEF=QWERTY)
decipher RGXWSTLSQLITL where (ABCDEF=QWERTY)
How do you solve this?
- 7,490
8
votes
4
answers
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Scrambled Pizza Order
It's your job to gather the pizza orders for everyone in the lab you work at in New Mexico, but it appears that the order for Richard has become corrupted and scrambled. He attempted to send it over ...
- 1,825
5
votes
1
answer
457
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Unfair tiling puzzle
Your goal is to make two squares of the same size from a set of rectangles. Each of the rectangles has an aspect ratio of $1:2$.
Select two sets of rectangles from the list:
...
- 503
6
votes
2
answers
1k
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Alone in the corner - who am I?
I'm always alone in the corner of the (usually) black/white surface,
Although sometimes people come to me at the time of exit,
You have to cross 14 bridges for a vacation from me,
I'm half of my ...
- 41.7k
3
votes
1
answer
197
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6
votes
3
answers
684
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Finding a Russian alphamagic square
The puzzle is to find a Russian alphamagic square (of which there are currently none discovered).
Using programming is not necessary. If you do solve the puzzle using programming (which is much much ...
CommunityBot
- 1
5
votes
1
answer
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A certain partition of 130
Given a multiset of positive integers, its P-graph is the loopless graph whose vertex set consists of those integers, any two of which are joined by an edge if they have a common divisor greater than ...
- 136k
7
votes
2
answers
321
views
Dissect a square into 3:2 non-congruent integer-sided rectangles
(Similar to the recent 3:1 rectangle question)
Tile a square completely with rectangles which have aspect ratio 3:2, integral side lengths and all different sizes. In other words selected from 2x3, ...
- 18.1k
10
votes
1
answer
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Files hidden in files (puzzling question)
Not sure if Puzzling is the right place for this, but I couldn't find anywhere else to ask.
I've been seeing this image circulating around a few Discord servers:
When converted to mp3, you get the ...
- 3,845
3
votes
2
answers
430
views
The most probable key
You broke into John Doe's house and found the safe. It has a combination lock with 4 dials ranging from 0 to 9 each. ...
- 5,948
26
votes
3
answers
1k
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The PSE School of Enigmatics (Part 1)
Update: I fixed up the second image, making it (perhaps) a little bit easier to crack.
You leap out of your bed. Today's the day!
You check your mailbox, and wow, there it is! The frayed look of the ...
- 31
10
votes
1
answer
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Help me decompress this old file
A long time ago in a basement far far away I created my own operating system.
Unfortunately I made a foolish mistake when designing the file system.
I choose a single byte for representing file sizes. ...
- 542
2
votes
3
answers
399
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Find the TV series
I'm looking for a TV series. A hint is hidden in the following image:
As this is a computer-puzzle you might want to download the image.
- 5,948
6
votes
2
answers
532
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Alternative lyrics
I've been listening to some Alternative music but the lyrics on my album booklet seem to have some printing errors. Can you help figure out this verse?
+2203 166 127 +2282 29.9, -90
(79 75) +...
- 1,221
1
vote
1
answer
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Hackers have created a new scheme to send passwords (advanced version)
Note: Following puzzle is an advanced version of this puzzle. Both of them were used in a competition called Cyber Cube 2017 located in Tbilisi, Georgia. Every detail of task is virtual and this ...
- 849
4
votes
1
answer
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Hackers have created a new scheme to send passwords
Note: Following puzzle was used in certain competition and every detail of task is virtual (This certain competition is not ongoing).
Hackers have created a new scheme to send passwords. ...
- 119k
-2
votes
2
answers
355
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My Program Kept Failing -- But Why?
I've been working on a Turbo C program for a while now. I had my usual share of bugs and fixes, until it got a really weird error -- an error that could only be explained by something accidentally ...
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votes
4
answers
789
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MS Excel Die Hard
You are John McLane, and Simon Gruber is back in town.
This time he booby trapped 50 nuclear power plants across the US, and sent you a laptop he prepared, along with the following note:
Any attempt ...
CommunityBot
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3
votes
1
answer
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Determine all possible positive palindrome(s) numbers [closed]
Determine all possible positive palindrome(s) N numbers, such that the
decimal representation of 2 x N^2 has no leading zeroes and contains
each of the digits from 0 to 9 exactly once.
- 4,492
1
vote
1
answer
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Among the Worlds top language that I am, Would be the one that serves, Ultimately the n00bs!
Among the World's top language that I am,
Would be the one that serves,
Ultimately the n00bs!
- 56
3
votes
1
answer
292
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Guide dots to land on any pair of matching portals at the same time
Try it out here!$^{\dagger}$
$\hskip2in$
Question:
First, I'll define the left blue dot as dot 1, and the right blue dot as dot 2. Left being <, right being <...
- 22k
27
votes
8
answers
2k
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Meatsacks, please help us decipher this code
Be greeted, meatsacks. We have been studying several of your species for some time now. One of the subjects, some meatsack related to saving Earth several times, seemed to know a lot of our operations ...
CommunityBot
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2
votes
1
answer
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What are the five most Linguistically Stiff numbers below 10^9
The linguistic stiff(LS) of a natural number is the ratio of the amount of letters in the writing of this number in English to the sum of amount of its digits and amount of vowels in it.
For example, ...
- 41.7k