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4
votes
2answers
117 views

A picture is worth a million memories!

What does the above picture refer to? Hint:
2
votes
0answers
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?"
5
votes
0answers
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 ...
9
votes
2answers
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. ...
3
votes
1answer
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 ...
5
votes
1answer
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 ...
19
votes
1answer
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,...
7
votes
3answers
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 ...
7
votes
3answers
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 ...
0
votes
1answer
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 ...
3
votes
0answers
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. <...
8
votes
1answer
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, ...
8
votes
6answers
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 ...
2
votes
1answer
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 $w, x, y$ ...
5
votes
5answers
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 ...
0
votes
1answer
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?
98
votes
1answer
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?
21
votes
1answer
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. ...
6
votes
1answer
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&\\...
6
votes
2answers
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 ...
26
votes
5answers
4k views

An unusual and very hard number sequence problem

I heard this number sequence problem about 25 years ago from a maths lecturer. What number should go in the place of the question mark in this mathematical sequence: $..., 30, ?, 60, 90, 140, 225, ...
0
votes
0answers
151 views

Code @9?]O=u1,7@9@JdA8PLh Clue: A Person who owns or manages something [on hold]

Code @9?]O=u1,7@9@JdA8PLh English Word Clue: A Person who owns or manages Something. I saw this in a game
2
votes
2answers
70 views

A word challenge/competition! (ft. Categorically Deceiving words) [on hold]

Here are the rules: A Categorically Deceiving word is one whose letters can be mixed around to form a new word which belongs to the same category as the original (e.g. red and green belong to the ...
1
vote
0answers
36 views

The Switchup-2.0

This question from last year (which in itself was anticipated on CSE two years prior) has a complete switchup of all non-pawn pieces on the board. The idea is to optimize the amount of moves needed to ...
11
votes
7answers
2k views
16
votes
3answers
608 views

A sheet of graph paper and a code

IMPORTANT EDIT: If you looked at this before 00:30 UTC 26 May 2019, please reread - the puzzle has been changed Samantha sat down at the fifth computer in her university's computer lab, hoping to ...
5
votes
1answer
56 views

Hiker's Cabin Mystery | Pt. X

Before we get into it, I'd like to take a moment to congratulate everyone on us reaching part ten, but especially you because you've been putting up with this nonsense and travelling all over the ...
25
votes
6answers
886 views

I can be heavy, but I'll never sink. When I am ready, my glass is a drink

Riley Riddle: My prefix runs past, When you leave what you cast, Where a square may be skipped by a pawn. My suffix is vast, When I swap first with last, Where a breath may be currently ...
10
votes
2answers
153 views

Finger sequence – find the continuation

Pick the correct continuation for the sequence. Options: Hint:
10
votes
1answer
219 views

Reverse dots and boxes – Guess the last move

Alice and Bob are playing a game of reverse dots and boxes. The players take turns adding one horizontal or vertical line of size 1 in one free spot on the grid (marked with light gray lines ...
11
votes
1answer
144 views

Masyu-making game

Two players are playing a game on a $4\times4$ board. The players take turns adding either a white circle or a black circle into any empty square, so that the board makes a solvable masyu puzzle (with ...
11
votes
11answers
3k views

Three Subway Escalators

This is not my puzzle, and I don't remember the source, but I don't see it posted here yet, so... Update: After reading some of the alternative answers, I realize this puzzle would be better with an ...
12
votes
1answer
514 views

Partiti : solve this new type of puzzle

These are puzzles similar to Kakuro, which is the creation of a friend of mine whom I met last year: Rules: Place one or more digits from 1 to 9 in arbitrary order in each empty cell, such that a ...
4
votes
1answer
62 views

The revenge of 3D light bulbs

This is a three-dimensional Akari puzzle (also known as Light Up). The five squares represent the layers of a $5\times5\times5$ cube, top to bottom. The objective is to add light bulbs into any number ...
8
votes
1answer
101 views

Which family is it?

On the 20th of July '19 it's a large family of 175 members that keeps growing. Youngest is only 2 months. Only four of them are more than 10 years old. What family is it?
1
vote
2answers
79 views

A weird cipher inside video game

Recently a game named "Ode to a Moon" released.... during the gameplay there are several cipher sentences flashing on the screen. I was trying to decode them as a cryptography amateur(noob),but still ...
36
votes
2answers
6k views

Escape the dungeon, by deciphering the codes and navigating the rooms to find a way out

You have been thrown into a dungeon with many rooms; you don't know who did this or why. You start in room 37. You might be thinking "Why 37?", so I will explain this: "Why not?" You need to find ...
10
votes
5answers
9k views

The Morality of Rice [closed]

This is a classic riddle of mine. Please read the scenario below for the setup. You are sitting around a campfire and a friend smiles and says: Sam: I have a riddle. Intrigued, you ask him what ...
1
vote
2answers
371 views

Off roading in a desert [closed]

You’re off-road, in the desert, driving an all-terrain vehicle. You’re $10$ miles off the straight highway, and your destination is $100$ miles ahead, also $10$ miles off the straight highway. You can ...
2
votes
1answer
357 views

Who is Paul's girlfriend?

Persons: ...
-3
votes
1answer
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 ...
7
votes
2answers
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 ...
8
votes
2answers
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 ...
3
votes
0answers
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 ...
3
votes
2answers
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 ...
3
votes
2answers
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. ...
14
votes
4answers
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? ...
2
votes
0answers
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
5
votes
0answers
98 views

Game Night at the Binomial Elks Club

The Binomial Elks Club, being predominantly composed of ambitious and competitive personalities, often held game nights in which members enjoyed battling each other for high stakes and bragging rights....
16
votes
2answers
1k views

What is a Romeo Word™?

In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles.Template taken from Rubio. Finally made a formal What is a Word puzzle after the ...

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