# All Questions

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117 views

### A picture is worth a million memories!

What does the above picture refer to? Hint:
21 views

### Is it simple Math or something else?

Grandpa with his mischievous smile said: "If zero belongs to One And two belongs to Four Twenty seven belongs to Seven Then what belongs to Three?"
158 views

### A periodic message

I was wandering around Washington, D.C., recently, not paying attention to where I was, thinking about codes and ciphers, when suddenly it hit me. No, really: a blast of wind blew a paper right into ...
781 views

### Somebody hacked my clock

Harvey the hacker hacked my clock. At first, the results made no sense, but I eventually figured out his logic. ...
88 views

### Saturdays' Sequences

0.469281 0.267974 0.333333 0.333333 0.666667 0.499346 0.333333 2 2 1 1 2 2 1 3 2 F 0 0 0 0 U P F O X F E 0 0 1 1 2 1 1 Here are 5 intertwined sequences. I will add one sequence each saturday ...
135 views

### A world with roman numeral alphabet

Tomorrow you will wake up and all the letters will be replaced by roman numbers. That'll be "ok" when you'll learn the replacement's order! Nevertheless, today you have the possibility to make it a ...
917 views

### How did my little sister survive?

In a far other universe, my little sister was trapped in a cave. Surprisingly for humans, in this universe, all caves are electronic. This electronic cave had nothing but 5 buttons, two little screens,...
2k views

### Open a safe with the safe riddles

With the help of you great people, I was able to open my Grandma's box. She really appreciated it, and I am afraid I'll have to ask for your help again. Grandma called me last night and told me that ...
240 views

### Which Birch Bark Manuscript is Genuine?

Inspired by a question from JLee You arrived at Siberia where, just one month ago, excavations discovered a civilization that existed and traded for hundreds of years, developing an elegant language ...
230 views

### Fuzzy's Fizzy Dilemma

Fuzzy the Fuzzball's friends was going to the Fuzzball Festival, and of course he went along. While there, he saw the most curious display. The booth was displaying brand new types of Fuzz. There was ...
69 views

### Find the PSE user name

Hidden in the ciphertext below is a user name from puzzling.stack.exchange. Who is it? The intended answer uses all of the ciphertext, not just a snippet that happens to match somebody in some way. <...
63 views

### A bicolour masyu

This is a bicolour masyu puzzle. Instead of making one continuous loop, the goal is to make two separate loops, one blue and one red. The coloured circles must be used for the loop of the same colour, ...
351 views

### Inside Out and Back to Front

Here's a quickie: I own a shirt that has a logo on the chest on my left side. This morning I accidentally put it on inside out and back to front. Where did the logo go? Please explain your answer ...
190 views

### 1-2-3 Ending Puzzle

$ED \quad \ \ \ EN \quad \ \ UE$ $451\ \ \ \quad 662\ \ \quad8w3$ $1601\quad2062\quad16x3$ $2551\quad2282\quad16y3$ $2551\quad1112\quad10z3$ There's only one possible value apiece for $w, x, y$ ...
165 views
+50

### Mysterious loss revamped

This is a revamped version of my puzzle Mysterious loss of weight . I plan to make a series of puzzles on mysterious loss of ... say a number. A man went into a black room full of white papers lying ...
71 views

### What is the missing number in the box

I found some online number puzzle as below: My guess was 436 (go up by 118 again, as the left & right go up by 1) but apparently it was incorrect. I cannot see any other patterns, any ideas?
7k views
+200

### How can this shape perfectly cover a cube?

The following shape: can be folded onto the surface of a cube in a way that perfectly covers the entire cube with no gaps and no overlaps. How can this be done?
2k views
+100

### What happens on Day 6?

My friend, who works in a Library, has recently learned about Puzzles, in general, and Puzzling Stack Exchange, in particular. He was excited and has sent me this puzzle to "test" the users of PSE. ...
68 views

### Black to play and win (Teeko)

\begin{array}{|c|c|c|c|c|}\hline\\ &&&&\\\hline\\ &&&&\\\hline\\ &&X&O&X\\\hline\\ &X&O&O&\\\hline\\ \phantom A&&X&O&\\...
217 views

### The CompuTaria Quest - A young Wizard's journey

Once Upon A Time In A Land FAR, FAR Away... Our adventure begins in the enchanted land called "CompuTaria". You are, "Binaryian" a 3rd year Wizard In Training. Today began like any other day - you ...
4k views

357 views

Persons: ...
128 views

### we are five we have three thousand four hundred fifty who are we? [on hold]

we are five we three thousand four hundred fifty, who are we ?. Its a riddle like question but stranded with getting the answer for this question , am very sure the answer will make me slap my head ...
222 views

### Nono-cube - Ultimate Puzzle Giant

Prologue - Instructions Shamelessly copied and pasted the following from @jafe's puzzle :P This is a three-dimensional nonogram. The first square gives the enumerations for the Z-axis, top to ...
835 views

### 3D? No-no! 3 Sides

Introducing the Isometric Nonogram! α) "Boar"ing Definition [oink] Column: Blue Part + Green Cell Row: Yellow Part + Green Cell Adjacent/ Continuous cells: Purple Cell + any of the Orange ...
59 views

### And yet you'll reunite

Your crush texted you: Met me there, tomorrow, 21th of July. Prove all your romance is true. Prove what you learnt in maths, computer science, litterature... and during all those years of studying ...
199 views

### Coin around shapes: A Geometric paradox?

Here is a circular coin with diameter D Figure A From its starting position the small coin goes completely around a bigger circular body of diameter 4D without slipping, always in contact ...
159 views

### 5 Precommitting Pirates Puzzle

Another variant of the Pirate Puzzle, inspired by this variant and a bit more complex. Scenario: Five pirates of different ages obtain 100 gold pieces in total, and want to decide how to split them. ...
1k views
+50

### Stuck in a Virtual Dungeon

You're stuck in a virtual room. You tried to open the door but it seems to be locked. The robot guard opens the door's tiny window and looks at you. You: Can you please help me get out of here? ...
67 views

### Complete the series on this set of numbers [on hold]

Here is one that I can't seem to solve: Complete the following series: 529, 531, 542, 544, 561, 558