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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10
votes
2answers
558 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 ...
4
votes
3answers
783 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 ...
8
votes
3answers
961 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 ...
7
votes
2answers
204 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
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 ...
4
votes
1answer
373 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 ...
0
votes
1answer
252 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
263 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: <...
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'...
21
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 ...
29
votes
5answers
1k views

The old tinkerer's safe

A client of mine died last Sunday - just as he was born on a Sunday. He was already at rather ripe age, and I had the pleasure to present his last will to his loving and caring family. As far as I ...
8
votes
1answer
867 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: ...
10
votes
2answers
3k views

decipher RGXWSTLSQLITL where (ABCDEF=QWERTY)

decipher RGXWSTLSQLITL where (ABCDEF=QWERTY) How do you solve this?
8
votes
4answers
725 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 ...
5
votes
1answer
381 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: ...
16
votes
1answer
505 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 ...
6
votes
2answers
1k views

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 ...
3
votes
1answer
187 views

Pain Brings Joy

When I search for pain, it brings such joy What is it that I seek? Hint:
6
votes
3answers
628 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 ...
4
votes
1answer
309 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 ...
1
vote
1answer
1k views

Algorithm for solving the permutation puzzle Tricky Animals

I have developed a game called Tricky Animals where the goal is to reorder the animals in the right order with three permutations: $A = (1,2), X = (2,3,..,n-1), B = (n-1, n)$. The game can be played ...
7
votes
2answers
266 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, ...
10
votes
1answer
785 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 ...
3
votes
2answers
368 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. ...
24
votes
3answers
998 views

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 ...
8
votes
2answers
3k 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 ...
10
votes
1answer
388 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
318 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.
6
votes
2answers
483 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
186 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
239 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. ...
-2
votes
2answers
342 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 ...
4
votes
2answers
445 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
723 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 ...
3
votes
1answer
130 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
210 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!
3
votes
1answer
202 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 <...
26
votes
8answers
2k views

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 ...
2
votes
1answer
307 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, ...
1
vote
1answer
163 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 <, ...
12
votes
8answers
5k views

A Simple Programming Task

You are given a task to write a program to switch values between variables, but you are not allowed to use any extra variable or any function to exchange values between the other variables as shown ...
6
votes
1answer
1k views

Junk decryption— a puzzle I found on a wargame site [closed]

I have found this puzzle and I wanted to share it with you to see if anyone can solve it, because I can't figure it out. **Can you put this all together?** From: Agent J To: adib Agent, ...
3
votes
1answer
382 views

What is a Number with Feeling™?

In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles. If a number conforms to a special rule, I call it a Number with Feeling™. Use the ...
3
votes
8answers
963 views

An exercise on the powers without using the logarithm function

One can find on the forums a lot of exercise where the pupils call for help to solve their maths, once I came across an exercise similar to this one: Determine with a simple (non-scientific) ...
1
vote
1answer
759 views

The swap puzzle

The swap puzzle Place small coins heads up on the squares marked H and tails up on the squares marked T. Swap the positions of the Heads for the Tails in as few moves as possible. There are two ways ...
4
votes
1answer
261 views

Find the equality with all digits

$A\tfrac{B}{C}=100$ is the equality where A,B,C are numbers generated by combining all digit values $0,1,2,3,4,5,6,7,8,9$ only once for each digit in total. For example; $123\tfrac{4567}{890}$ is ...
6
votes
1answer
304 views

you probably read this wrong!

Read this carefully: ‮114 116 108 111 https://repl.it/010010010100‮11000110110001011000 What's my message? Hint:
20
votes
4answers
1k views

The Prison Escape Pt. 1 (THE DOOR)

You are currently escaping a prison owned by a mad scientist. As you were about to approach a large iron door that you think should be leading to the exit, a guard came out from the shadows. ...
18
votes
2answers
2k views

Who can spot the difference?

My family and I have just moved house! Lucky us! So what did my family do? We held a housewarming party, and rung everyone in the neighbourhood up to invite them. So, anyway, people were coming in ...
18
votes
2answers
689 views

Away from the hub

Today I got a weird FaceTime call from teenage girl I didn't know. They must have dialled the wrong number, but I was too intrigued to hang up. Instead, I covered my camera and turned off the ...