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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5
votes
2answers
222 views

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 ...
25
votes
2answers
1k views

A Racing Heart!

This puzzle is about an athletic, hearty person. Therefore, there are 3 pieces of information hidden accordingly: For each clue, including trailing remarks such as "(2 words)", remove all numbers, ...
12
votes
2answers
318 views

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 ...
14
votes
4answers
2k views

What is the password in the image?

For my first puzzle I made this, everything you need is in the image. The goal is to find the hidden password. You must look at the image to solve this puzzle, but here's a transcript of the letters ...
6
votes
3answers
361 views

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 ...
6
votes
2answers
267 views

Tiling rectangles with V 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 ...
3
votes
3answers
226 views

Tiling rectangles with U 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 ...
8
votes
2answers
269 views

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 ...
7
votes
6answers
555 views

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 ...
8
votes
3answers
645 views

Tiling rectangles with F pentomino plus rectangles

Inspired by Polyomino Z pentomino and rectangle packing into rectangle Also in this series: Tiling rectangles with N pentomino plus rectangles Tiling rectangles with T pentomino plus rectangles ...
14
votes
2answers
586 views

Tiling rectangles with W 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 ...
11
votes
3answers
3k views

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, ...
8
votes
3answers
996 views

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 ...
10
votes
2answers
574 views

Make some Guacamole!

Subject: Mole Date: Sat, 31 Mar 2018 14:20 From: Chowzen {chowzen@segmented.org} To: PuzzlingEnthusiast {pe@puzzling.se.edu} PE: As you may be aware,I am the leader of an ...
7
votes
2answers
219 views

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 ...
5
votes
1answer
517 views

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 ...
1
vote
1answer
296 views

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: ...
1
vote
1answer
396 views

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: <...
5
votes
7answers
3k views

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 ...
16
votes
3answers
1k views

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'...
22
votes
6answers
2k views

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 ...
10
votes
2answers
3k views

decipher RGXWSTLSQLITL where (ABCDEF=QWERTY)

decipher RGXWSTLSQLITL where (ABCDEF=QWERTY) How do you solve this?
8
votes
1answer
939 views

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: ...
8
votes
4answers
757 views

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 ...
6
votes
2answers
266 views

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
votes
1answer
195 views

Pain Brings Joy

When I search for pain, it brings such joy What is it that I seek? Hint:
5
votes
1answer
429 views

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: ...
5
votes
1answer
326 views

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 ...
6
votes
3answers
660 views

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 ...
10
votes
1answer
902 views

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 ...
7
votes
2answers
293 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, ...
20
votes
1answer
737 views

Old code for the new year

Here is a question I posted on rec.puzzles back in 1998. So it's about twenty years on, and people seem to have stopped thinking about it. I'll refresh your memory by posting it again: I wrote a ...
8
votes
2answers
6k views

Unseen, but Hidden in Plain Sight

This riddle has a single, one word answer, with an explanation as to how you found it. You may be able to make a good, or even correct, guess from just the contents of the poem below, but if you've ...
4
votes
3answers
790 views

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 ...
10
votes
1answer
405 views

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. ...
2
votes
3answers
364 views

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.
3
votes
2answers
404 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. ...
6
votes
2answers
502 views

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
vote
1answer
204 views

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 ...
3
votes
1answer
261 views

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. ...
16
votes
8answers
1k views

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 ...
-2
votes
2answers
347 views

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 ...
6
votes
2answers
530 views

Boggling googling

I'm a number for you to evaluate, Googling 'me' gives the drop off the Empire State, Though the great Google finds no results for me, I'm just a pure integer value you'll see. What number am ...
6
votes
4answers
773 views

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 ...
3
votes
1answer
134 views

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.
1
vote
1answer
215 views

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!
10
votes
1answer
489 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 ...
2
votes
1answer
311 views

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, ...
3
votes
1answer
239 views

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 <...
1
vote
1answer
187 views

Guide the dots to land on the portals at the same time

Question: First, I'll define the top left dot of the empty middle square as dot 1, and the bottom right dot of the empty middle square as dot 2. Left being <, ...

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