# 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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### Internet Problem Solving Contest 2017 - Problem M

I was practising interesting problems from past problem solving contests when I found this one. I guess that I should find some hash functions to find the candidates and check them by hand. I tried ...
• 111
1k views

### Today is a prime!

Today, 20240603 already in some parts of the world, is a prime number. Just twenty-one other dates during 2024 are also primes. In what year will there be none?
499 views

### Rubik's Cube with no two squares of the same color on any horizontal, vertical or diagonal line

Consider the 12 lines depicted below which all run through the centers of the 9 color squares of a single face of Rubik's Cube. Can you find a scramble such that on each line all squares have ...
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316 views

### Weird Programming Glitch

Yesterday, when I was programming, my computer suddenly crashed. When I rebooted, I saw the message flicker before me: ...
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422 views

### a11eN756e64657261747461636b

Note: if it isn't obvious, none of the below or any of the decrypted message are intended to be real. C:\TopSecret\vacant\alien_transmission.jpg: ...
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271 views

### All poker hands from a single deck

This question suggested itself to me – and I found a solution – after I solved Can you balance this poker deck?. Take out two aces from the standard 52-card deck. Your challenge is to partition the ...
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470 views

### What Language Is This?

It is the year 2204, and we have finally found intelligent extraterrestrial life. We are delighted about this, so we asked the aliens, ...
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1 vote
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### Am but not equal

I am myself, but I am not equal to myself. What am I? Hint:
688 views

### Why did it crash?

You are on your computer on June 23rd, 2021 at 10:24:58 am, when it suddenly becomes bricked. Your electronic devices all fail, except for your newest technology. Why? Hint 1: Hint 2: This didn't ...
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317 views

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### Warning!! We need to rescue Mr. Greg

Greg, our Server Security Admin, was locked up today in his own Server Room. (Yeah, quite crazy I know). The guy had forgotten the password to unlock his door. Fortunately he had saved the password on ...
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2k views

### Do I still have time?

My boss told me he had something important to tell me, that I needed to read by the end of the day. I told him I was on it. See, I didn't want to admit I was "Working From Home" from the ...
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309 views

### Four 3x3 semimagic squares in a 5x5 grid

Can you place every number from 1 to 25 in a 5x5 grid such that it contains four 3x3 semimagic squares? A semimagic square is a square whose rows and columns all sum to the same number. This is ...
• 36.3k
830 views

### Ernie and the Chance to Save a Beautiful Relationship

I should have smelt a rat when Ernie invited me to an event at the local club rooms, because when I asked why his wife was not attending, he replied that she had another engagement for that night. “I ...
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189 views

### More bits the merrier

The computer department at Puzzled State University devised an inefficient bit-based (zeros and ones) number system, n', for their ever more bit-happy machines. ...
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1 vote
370 views

### I am an 100 letter word, who am I?

I have been watching you. From the moment you were first conscious, I have been watching; Until the last time you lose consciousness, I will be watching. I am always by your side, witnessing you. ...
• 567
724 views

### Solution for Robozzle puzzle no 291 - Huh? Part 2

I want to solve Robozzle puzzle number 291 - Huh? Part 2. You can see it raw in the image below. You need to collect the stars without falling out of the given grid. You are the rocket on top-left ...
• 595
722 views

### 1000 digit sum calculation puzzle

I have 7 numbers that add up to the same value as the sum of the base 1000 digits of the product. Here are the numbers: 86, 203, 296, 395, 401, 407, 913 The first part of the puzzle is to understand ...
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817 views

### Shorter solution for Robozzle puzzle no 132 - Split

I wonder a shorter solution for Robozzle puzzle number 132, "Split." Puzzle is shown below. I have solved it but I'm wondering shorter solution for this and there many exist. Basically, the ...
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2k views

### Using sentence, turn intense into incense; what tool do I need?

Puzzle What tool do I need to turn intense into incense, using sentence? The same tool can turn dated into demented, using statement. Hints (Kudos: the accepted answer was published before the hints.)...
719 views

### How to make gifs showing a puzzle's solution process?

I've been repeatedly asked to turn this into a PSE question, so here goes. Some people may have noticed that, when I answer a grid-deduction question, my answer often includes, as well as a step-by-...
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658 views

### Parϯner up and find the imposter!

Messenger, Our 5 top agents ѡill sօon arrive in diಽguise for the big meeting this weeĸ, and each has provᎥded their credentialઽ, but we've just received word one may be an imρostеⲅ sent by ouᴦ enemies....
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242 views

### Someone else's Machine Learning tutorial code

This puzzle was inspired by some tutorial code I downloaded from someone else’s GitHub. To protect the guilty, I have withheld the author’s name, paraphrased the relevant Python into pseudo-code and “...
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433 views

### The Empty Cube (Interactive Puzzle)

I've made an interactive 3D cube puzzle in CSS, The puzzle is fully solvable from the images below, but the fully interactive version is here: https://codepen.io/chengarda/full/RwyKvwz The empty cube ...
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444 views

### Largest word tree

I was inspired by this awesome puzzle. Here is an image of a word tree borrowed from there: In a word tree every path from the root to the leaves must form a distinct word. The size of the tree is ...
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216 views

### A rebus puzzle describing a name

This is a rebus puzzle describing a singer's name. This puzzle will still be pretty straight-forward, though you really need a little knowledge in programming this time... ...
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260 views

### A rebus puzzle consisting of four characters

This is a rebus puzzle consisting of four characters. The puzzle is very simple if you're knowledgeable enough. Given four characters, guess two words: ΔΕὖ% The first word consists of 5 basic Latin ...
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818 views

### Rebus puzzle with four colored bars and diagonals between them

This is an extremely simple rebus puzzle, the answer is extremely obvious if you know where to seek, you only need some lateral thinking, and maybe some basic programming knowledge. To make it even ...
• 567
404 views

### What is the encoded message?

I created the puzzle by myself. Encoded Message Examples Hello World Hello, World! Python Hints: I made another image to illustrate the encoding better (all the images were generated by a Python ...
• 567
9k views

### ▉ ▎▊ ▐▎ ▋█ ▐▉ ▋█ ▐▉ ▎▊ ▐▎ ▎█ ▐

(I created this puzzle myself) I was shopping for groceries the other day, and I found an item that was in an unlabeled, uncolored package. In fact, the only thing that was on it was this barcode: ...
351 views

We are going to generate information out of nothing (well, nothing and a bit of something) just by randomly bouncing a ball. The result will be a message you can use to protect humanity. Let's use ...
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