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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3
votes
1answer
187 views

Pain Brings Joy

When I search for pain, it brings such joy What is it that I seek? Hint:
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: ...
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 ...
6
votes
3answers
627 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 ...
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 ...
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, ...
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 ...
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 ...
4
votes
3answers
782 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
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.
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. ...
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. ...
15
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
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
443 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!
10
votes
1answer
454 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
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, ...
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 <...
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
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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 ...
3
votes
1answer
380 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 ...
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 ...
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
758 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 ...
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 ...
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:
18
votes
2answers
687 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 ...
2
votes
1answer
286 views

Two-Button Idle Game

Two-Button Idle Game is a puzzle that was made for but not included in the Galactic Puzzle Hunt, and can be found here. It was mentioned in the wrap-up (Caution: Spoilers!), but no solution was ...
17
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 ...
22
votes
2answers
2k views

The Legend of Sally the Cow

I was looting exploring Pelagia Farm and I stole found this note in a locked chest on the ground. It seems that one of the farmhands had tried their hand at poetry. I want to know how it ends but some ...
25
votes
14answers
2k views

The master programmer and the mystical reversal

The master programmer sat at his desk, gazing into the distance, his eyes seeing, and yet unseeing. The lunch had been heavy. His reverie was interrupted by the appearance of his close colleague, ...
10
votes
2answers
626 views

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 ...
13
votes
3answers
740 views

The Hyper-Modern Kidnapper: Crime Scene #5 (The last crime scene)

The Story: It had taken longer than planned to sneak out after having solved the word search with the hidden message. Vimes was worried that he had alrady failed. Having taken the stairs to reduce the ...
6
votes
2answers
706 views

The Hyper-Modern Kidnapper: Crime Scene #4

The Story: As soon as he read the message that Lipwig found, Sergeant Vimes raced home, sirens blaring for traffic to move aside. His daughter was home in her room. His daughter was home in her room. ...
8
votes
1answer
3k views

Creating a Kakuro puzzle with unique solution

I start with a grid of black and white cells. I randomly populate the white cells from numbers (1-9) using kakuro rules. Then I calculate the horizontal and vertical sums. I remove the numbers from ...
12
votes
3answers
2k views

Programming News Paper Puzzle

This puzzle appeared in my local paper, while I am unable to solve it - maybe you guys can take a crack at it. Page 1 Page 2 They were scanned at pretty high resolution, so you should be able to ...
11
votes
1answer
361 views

Countries of World - Three Blocs

Two junior colleagues of mine came to me today morning. Both of them wearing a broad smile. I asked what the matter, what mischief are you guys planning. One of them just typed a URL on my computer. ...
6
votes
1answer
256 views

She Lia Squared: Our daughter asked, “How many words can it make?”

For puzzle experts out there I'm certain this will seem trivial. Our daughter recently conned my wife and I into purchasing interlocking foam squares for her bedroom floor. On each square is a ...
11
votes
1answer
224 views

Ode to Regular Expressions

Robert loves regular expressions and ever since his friend Jean introduced him to Regex Golf, he spends most of his time trying to find the shortest and most elegant solution possible. Robert is also ...
7
votes
3answers
217 views

When is it worth using Hexadecimal over Decimal?

How many bits does a number need to have, to make it worth using hexadecimal notation of the form 0xHHH...H over its decimal representation of the form ...
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. ...
9
votes
3answers
750 views

Little bit of a code in binary :)

Decode it and prove it :) Share if you think someone else can solve it. Here is a little bit of a challenge for lovers of code and encryption, the hints should be evident, but I think that I would ...
0
votes
1answer
147 views

Find 5 digits, which have the most numbers of prime numbers [closed]

If we have to use all available digits once, We can form 9 prime numbers from (2,5,6,7,8), they are : (25867,28657,56827,65287,65827,82567,82657,85627,86257) With the same rule, find another 5 ...