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1500 questions
65
votes
12 answers
Is it always possible to balance a 4-legged table?
A perfectly symmetrical small 4-legged table is standing in a large room with a continuous but uneven floor. Is it always possible to position the table in such a way that it doesn't wobble, i.e. all four legs are touching the floor?
No tricks. No…
Rand al'Thor
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65
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1 answer
Mysterious message from the NoSlaves™ Calculator Co
So my son is starting to show an interest in mathematics, and being the awesome dad that I am, I decided to buy him a basic calculator. Being the cheapskate that I am, I ordered the cheapest one I could find, which happened to be from NoSlaves™…
Alconja
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64
votes
4 answers
Gerrymandering Puzzle - Rig the Election
The following graphic is a map of the country Mathlandia:
You are currently running for reelection, but the polls aren't exactly in your favor. Each square in this grid is a county. Counties with a black dot are voting for you, while counties…
greenturtle3141
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64
votes
1 answer
Letter Police to the Rescue
You're sitting at your Alphabet City Police Department sergeant's desk on a normal Wednesday when the phone rings.
"Oh my god, oh my god! Please help me. It's my pet word. It's been, well, I don't know exactly, but...oh, the horror!" says a…
Dan Russell
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64
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5 answers
Game of Life: Move the Sun
Based on Game of Life: Kill the Sun
Conditions are the same:
Below is an initial state for Conway's Game of Life with a single pulsar. Living cells are white.
The area marked with red is your base. You are free to modify any of the red cells, but…
kamenf
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64
votes
12 answers
XOR - Is it possible to get a, b, c from a⊕b, b⊕c, a⊕c?
Just got a simple question from a friend; still thinking. Let's share it!
Is it possible to get a, b, c when you have a⊕b, b⊕c, a⊕c ?
where ⊕ is the boolean XOR (exclusive OR) operator.
a,b,c are any boolean numbers with the same length.
For the…
Jet
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64
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2 answers
Wanted: Family of 6
After many years, authorities are still looking for a family of 6, five of whom are suspected of many multiple-country border crossings with no passports or proper identification. Although no known damage has been done, the homeland security…
JLee
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63
votes
2 answers
The needle in the network - find it!
We all know it can be difficult to find a needle in a haystack, but in this puzzle you have to
#Find the NEEDLE in the network!
A bit more detailed:
Somewhere in the network pictured above hides the word Needle encoded in a rather well known…
BmyGuest
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63
votes
1 answer
The Evicted Tenant
Today, I started my job as a package delivery man. As chances have it, one of the delivery addresses was right on my apartment floor! However, the handwriting was so bad I couldn't even make out the room of the recipient. I guessed the only way to…
Chess960
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1 answer
Today starts my new puzzle series!
Wow. I said I might undertake to create fresh and witty Puzzling questions because brilliant men on the internet have solved my latest ones way too speedily for my foolish conceited pride - so everyone consider this a fledgling attempt I expect…
Rubio
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62
votes
2 answers
Can you perfectly wrap a cube with this blocky shape?
The following blocky 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 it be done?
plasticinsect
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62
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3 answers
For all your flag design needs
Pleased to meet you. I'm the CEO of a startup that specializes in designing flags for newly-independent countries. As an example, let me present to you the flag we designed for the proud republic of Guinefghanistance. Looks pretty, no?
Here is…
Jafe
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62
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2 answers
It's getting harder and harder not to offend anyone
Andy, Bob and Chuck are old friends meeting for the first time in years.
Scene 1: At the intersection
ANDY: Hey guys! Long time no see!
BOB: Hey, nice to see you, Andy! Have you seen Chuck? Is he coming?
ANDY: There he is, just about to cross the…
Jafe
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62
votes
3 answers
R.H.P.C. crossword puzzle
This is an entry into the Fortnightly Topic Challenge #36
I got a ticket to the Red Herring Puzzle Club in the middle of the street. There was just a guy giving them out, like some advertisement flyers. When I took one, I asked him "This club…
Thomas Blue
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62
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19 answers
Growing anagrams - What is the longest possible list forming a sentence?
This is a challenge for word-puzzle lovers. It might be a bit more of a game than a puzzle, but I think it is not limitless in it's answers, so a final answer could be found (eventually).
What is the longest list of growing anagrams which can be…
BmyGuest
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