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1500 questions
38
votes
18 answers
Emoji Puzzle - UNESCO World Heritage Sites
Emoji Puzzle - UNESCO World Heritage Sites
Created by myself during Covid-19 lockdown. I've posted an image because emoji rendering as text are not working too well.
Omar
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38
votes
3 answers
Which 3D shape can you make out of this?
The above shape can be folded into a closed 3D shape using no more than 14 distinct folds, with no parts overlapping. What is special about the shape that results?
Rules and clarifications:
Every part of the black boundary should meet up with…
N. Virgo
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38
votes
11 answers
Variant of lion and 100 zebras
Note: This problem remains unsolved, as of 19 April 2020, so do try it out. 400 rep bounty guaranteed for a correct answer
This a variation of this question by @Gamow
Suppose there are $100$ lions and $100$ zebras. The lions function together as a…
ghosts_in_the_code
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38
votes
1 answer
I'm largest when I'm five, what am I?
I'm very common and often you see me,
Everything's believed to be made of me.
Make no mistake, I look largest when I'm seven,
But I'm largest when I'm five, it is proven.
But alas at those ages you've never seen me,
For you've seen me…
Zoir
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38
votes
1 answer
The pirate treasure of Leatherback Atoll
Furious the captain returns to the ship. He throws the blasted map onto the deck kicks at it, misses, and curses the crew for their incompetency. He swears and slams his entire weight into his cabin door. He is gone, for now.
A quiet suspenseful…
Adam
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38
votes
2 answers
Introducing Gladys, an intrepid globetrotter
Gladys has always led an active life full of adventure. As a retiree, she has a lot of free time on her hands and loves to spend it on her two favourite pastimes – travelling and crossword puzzles. Today she embarks on a long journey that will take…
Jafe
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38
votes
4 answers
Happy pi day, everyone!
A baker is working a batch of dough. He shapes it into a cylinder of height a and radius z.
What will the baker make from this volume of dough?
Stewart Becker
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38
votes
8 answers
Who is our nearest planetary neighbor, on average?
Assume that the planets have circular orbits centered on the sun. Assume that the radius of the orbits is 0.39, 0.723, 1, and 1.524 for Mercury, Venus, Earth, and Mars.
Assume also that there are no resonances, in other words, that for a given…
Dr Xorile
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38
votes
11 answers
A Very Illegal Position
It's been a while since I've done a chess puzzle, so here's one!
This position is illegal in quite a lot of ways:
It's illegal in at least 10 ways. The first one to find all of the ways this position is illegal (it's 10 or more, I know exactly how…
Excited Raichu
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38
votes
2 answers
It's my birthday
Just like last year, my age is a number you can score with one dart. The year before that, it wasn't, and it won't be next year.
How old am I?
Rupert Morrish
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38
votes
1 answer
Chuck Norris vs. This Question
public var c: = Infinity;
public var w:Array = [,,
, ];
for(i = 0; i < w.length; i++){
if(chuck(i)){
x++;
}
else{
break;
}
}
trace(x);
function chuck(i):Boolean{
return c >…
Chowzen
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38
votes
2 answers
Solving the Same Riddle Twice
My prefix tries to scout out the concealed
My suffix reacts to an electric field
My infix has a rodent, but not in the middle
.. But isn't there a better way to pose this riddle?
My prefix is the red circle button
My suffix does sometimes…
Bass
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38
votes
10 answers
Unsolved Maths Problems as Puzzles
On an internal wiki at work, people sometime post puzzles similar to those found on this website. Most of the questions are formulated as a story or word problems, but can be expressed mathematically and become simple to solve.
I had an idea for a…
MikeS159
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38
votes
2 answers
The Exodus (speak the Pharaoh's name)
Once upon a time, Pharaoh sat upon his high throne, overlooking his realm, a dark realm indeed, bounded on four sides. His anger burned against his Hebrew subjects, neither young and old, nor rich and poor were spared. In his wrath, he forced…
McMagister
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38
votes
4 answers
Sometimes force is the solution [RTFM]
This time we are investigating a well secured safe. Simply breaking it is not possible (I've tried). We need to find the right combination!
Can you help me open it?
Along with the safe I found an orange puzzle card with letters and symbols…
Avigrail
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