Most Popular
1500 questions
32
votes
2 answers
Is this Hashi puzzle unsolvable?
I found this puzzle in my dad's bathroom. The book is "Things To Do While You Poo On The Loo". I think the puzzle is malformed. Here is a Penpa link to an online solver. Is there actually an answer to this puzzle?
Hashi Puzzle
This is a single…
ConnieMnemonic
- 514
- 2
- 13
32
votes
1 answer
IATA Airport Abbreviations
This puzzle is part of the Monthly Topic Challenge #1: Restricted Title: xkcd 1xxx
I had a visit yesterday from my good friend Major M. Provement. I say 'good friend' but he can actually be pretty annoying - he's always picking fault in my puzzles…
Stiv
- 140,467
- 11
- 495
- 752
32
votes
3 answers
▉ ▎▊ ▐▎ ▋█ ▐▉ ▋█ ▐▉ ▎▊ ▐▎ ▎█ ▐
(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:
And here's the barcode's text, for those who want…
Sylvester Kruin - try Codidact
- 1,201
- 5
- 22
32
votes
1 answer
The grass is greener on the other side (it's a matter of perspective)
What word is hidden in this image?
IAmLucidNonsense
- 3,382
- 8
- 36
32
votes
1 answer
Computation without a computer
In the number $(1+\sqrt{3})^{2015}$, what is the 224th digit after the decimal point?
You may NOT use a calculator, computer, or any electronic aid to answer this question. Only pen(cil), paper, and brain are allowed.
This should be relatively…
Rand al'Thor
- 116,845
- 28
- 322
- 627
32
votes
2 answers
The Second Hardest Logic Puzzle in the World
This puzzle is an original creation of mine (as far as I know), although other people have solved it before me.
You meet five people: Alice, Bob, Carol, Daniel and Evie. Your aim is to ask yes/no questions to identify them.
One of these five people…
Andrew
- 795
- 7
- 13
32
votes
3 answers
Should You Take the Pill?
An entry in Fortnightly Topic Challenge #50: Escape Rooms
Your head is throbbing like mad. You try to get your bearings as you look around the laboratory. Shattered beakers and spilled chemicals are everywhere. Another failed experiment. How long…
Amoz
- 26,817
- 2
- 63
- 159
32
votes
5 answers
How can 3 queens control the white squares?
It is well known that there is no way of arranging 4 queens on a checker board in such a way that every square is occupied or threatened.
Now consider a slight variation where we only need to cover one color:
Can you place 3 queens on a standard…
Paul Panzer
- 10,341
- 18
- 48
32
votes
1 answer
Re-Venn-ge of the Connecting Wall
An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls
Today I created a connect-wall puzzle (for which a solver would need to partition 16 items into 4 connected groups of 4, and then identify a 17th item that satisfies all four…
Stiv
- 140,467
- 11
- 495
- 752
32
votes
1 answer
Chain Puzzle: Tabletop Games #04 - Mansion Massacre
This is the fourth Chain Puzzle in the Tabletop Games series, in which all puzzles are themed around board games, card games, tile games, and the like. The answer to this puzzle is a thematic word or phrase. The solver whose answer is awarded the…
Lukas Rotter
- 10,321
- 1
- 49
- 89
32
votes
2 answers
CSE Hex Cube Puzzle
I've been tackling this puzzle named "Hex Cube" from the CSE (Communications Security Establishment, the Canadian "equivalent" of the NSA) which comes with the instructions: "Can you decipher the message? You should be able to if you go back to…
fstarnaud
- 93
- 2
- 9
32
votes
3 answers
Honest Monk Puzzle
Suppose you are on an island with 32 monks and you are told that one of the monks is always honest. Every day the monks say whether it is going to rain. You are required to say whether it is going to rain or not. Find a strategy that would make the…
tusharmakkar08
- 499
- 1
- 5
- 15
31
votes
7 answers
Almost impossible Sudoku like puzzle
I was set a puzzle in my math class. I tried to do it using an equation but it didn't work it looked like a trial and error puzzle so I took it into school and the math teachers couldn't solve it.
Is there a way to do this using an equation.
This is…
Plasman
- 431
- 4
- 7
31
votes
1 answer
Goodbye grand mother <3
My grand-mother died the 17th of June 20 from cancer after spending the last three months nearly alone in her house because of the COVID Pandemic. I dedicate her this puzzle. She's Lao and today, for her funerals, we have prepared 100 little gifts…
JKHA
- 6,033
- 13
- 35
31
votes
1 answer
Food Fight! (An extended VowelBurger™ puzzle...)
Inspired by Avi's Vowelburger™ Riddle here (and all its many clones!)
The food hall was a mess. A massive fight had broken out among the proprietors of the five burger stands stationed around the room. Each had been promoting five burgers of…
Stiv
- 140,467
- 11
- 495
- 752