Questions tagged [mathematics]
A puzzle related to mathematical facts and objects, whose solution needs mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack Exchange.
37
questions with no upvoted or accepted answers
12
votes
1answer
808 views
Weird and complex puzzle that we need help with
So basically this is a complex deep web puzzle and we're pretty much stuck at it right now as we don't have any idea what this is about, any help will be aprreciated (the attached images are the ...
12
votes
0answers
1k views
11
votes
0answers
207 views
Translating a fiendishly exceptional automorphism of $S_6$ into a lay-math puzzle
Foreward: This post not a puzzle in itself, but an invitation for you to show off your puzzle-making skill regarding a given topic. Although the tag description of "puzzle-creation" seems to ...
9
votes
0answers
371 views
Dead By Daylight
This puzzle is a reference to a game, Dead By Daylight. Though you don't need a knowledge about the game. Consequently, there is no "video-games" tag.
Story
The Entity wants to have the ...
8
votes
0answers
375 views
I'm a number with a special product, so name me when you think you've got it
In the blocks that come before,
their special product tells us more.
To guess my scheme you'll need calculation,
but only little tests of recreation.
Each block contains atoms strong as Thor,
...
7
votes
0answers
289 views
Sequence Puzzle - First Question of 42
Professor Tera was walking on Connecticut Road, where there are some public restrooms.
Tera saw some students standing in a row. They seemed to be playing a game called Evolution.
And it looked like ...
7
votes
0answers
159 views
Is it possible to create a knot that is locked only when the rope is stretched?
Is it possible to create a knot that is stable/locked when the rope is stretched?
When the tension is relived the knot should open.
7
votes
0answers
341 views
Open the French safe
While walking in a small alley in Paris, you come across a safe.
The number pad looks like this :
There are things on the back of the safe too :
"À l'aide du carré 3x3 ci-dessous et des nombres ...
6
votes
0answers
156 views
This puzzle's value is 334
The 28th of october is valued by 40. This sentence is valued by 17. This paragraph is valued by 143.
This puzzle is valued by 334.
Can you give the value of Puzzling StackExchange?
5
votes
0answers
156 views
An intriguing game construction
I found that the book "Amusements In Chess," by Henry Ernest Dudney, has been put onto the web in the form of a website. In the section "Various Chess Puzzles, I came across this ...
5
votes
0answers
174 views
The Abnormality of me
I just got born. There's nothing I can do. Maybe "nothing" is such an appropriate word for an age 0.
A year passed. There's still nothing I can do. I haven't changed. Maybe I am to retain my ...
5
votes
0answers
510 views
Locked Door Number Puzzle
I'm supposed to make a delivery to a crazed botanist. In case you're curious, the shipping manifest is:
...
5
votes
0answers
258 views
Find the missing element?
I've been trying to solve this for quite some time, can you help me solve it?
This puzzle was made by one of my friend's teachers. This is not copyrighted and cannot be found anywhere on the internet.
...
4
votes
0answers
277 views
Parallel Trees On The Grass
Let the picture speak for itself and try to find the correct height of the tree marked with "?".
Hint
Hint2
Strong hint
4
votes
0answers
162 views
Ernie and the literary criticism
When I dropped in on Ernie over the weekend he commented that he hadn’t seen me for a while. I had to confess that my evenings had been very busy recently - first at the local Community College doing ...
3
votes
0answers
138 views
Ideas on spatial puzzles for a city walk
Background.
With the relaxation of covid-related restrictions, there was a need for intelligent city walks. Walk here is a moving between city objects by a certain (deterministic/stochastic) route.
I ...
3
votes
0answers
165 views
The madness of a master
It was midnight. Mr. Holmes was suffering from abdominal pain, shortness of breath, pain in the bones, skin lesions and whatnot? So in this condition, why would Mr. Holmes drive to Brazilian Churches, ...
3
votes
0answers
187 views
3
votes
0answers
246 views
3 x 3 Grid Square Problem
For a question that I need to answer, we have to show that there is only one arrangement for which, in a 3 x 3 grid in which the numbers from 1 to 9 are placed and 5 is the centre number, the sum of ...
3
votes
0answers
217 views
Magical Evening
Tonight will be a magical evening full of fun and excitement if you can figure out this riddle.
When the clock strikes nine but loose three dash you will find a feast at the seven of these. Where ...
2
votes
0answers
83 views
Infected Cylinder and Torus
A variant of the well known Infected Checkerboard problem. If we've a 𝑛x𝑛 square, then we fold it along top and bottom row to form a cylinder. A cell in this cylinder becomes infected if at least ...
2
votes
0answers
100 views
Does anybody know the history of this star/triangle puzzle?
Does anybody know the history of the puzzle posted by Mario Bilotti? Who created this puzzle? Who deserves the credit?
Find 10 triangles in a five pointed star using two straight lines
2
votes
0answers
370 views
Not a sudoku, but still fun?
Context:
I was trying to solve some of the puzzles on this site, when it occurred to me to make a puzzle variant myself.
I immediately could construct one with my additional rule. Making an ...
2
votes
0answers
162 views
Even and primes puzzle?
this is secret numbers that increase regularly, what is the order?
If you like numbers, it will be fun.
$2^3 \times224299$
$2^2 \times 3^2 \times 19 \times 3557$
$2 \times 5 \times 320647$
$2 \times ...
2
votes
0answers
407 views
A robot moving on a grid. Part 2
This is an extension of the discussion
A robot is placed on a grid point. At each move the robot must take three steps along the edge of the grid. After each step the robot must turn right. Lengths of ...
2
votes
0answers
135 views
The Game of Numbers (#02)
Related to The Game of Numbers (#01)
Agatha just decided it still isn't enough because she thinks it's way too easy. She decides to add one more rule to the list and change some of the existing rules.
...
2
votes
0answers
116 views
Probabilities for “What number is that? — asks grandpa”
Inspired from Multilanguage generalization of "What number is that? Asks Grandpa" and What number is that ? Asks Grandpa
In this puzzle we will use the English alphabet of 26 letters. We ...
2
votes
0answers
147 views
Minimum number of clues required for a 16 x 16 Sudoku
It is well-known that the minimum number of clues that completely specify a 9 x 9 Sudoku is 17. What is the minimum number of clues required for a 16 x 16 Sudoku whose cells contain one of the ...
asked Apr 28 '20 at 13:08
Bernardo Recamán Santos
11.8k2 gold badges21 silver badges110 bronze badges
2
votes
0answers
229 views
Code Breaking ( Sort of )
So someone sent me this code breaking/riddle to solve and I got really confused on it. I do need help on it,
The Code needs to come out into a Phrase ( group of words )
CLUE 1: 2210232013400 - ...
1
vote
0answers
186 views
The meaning of the related numbers
Question: What follows in the sequence below?
10233432943
As a hint, I must say I do not like the single 1 in it. It is unclear if the sequence even started with 1, but the 1 it needed.
I had to ...
1
vote
0answers
106 views
Searching online catalogs is a pain. Can you tell me if it's worth my trouble?
Searching online catalogs is a pain. Can you tell me if it's worth my trouble?
As an example, I searched the following online catalog of a well-known country-wide British outlet for the keyword "...
asked Jul 23 '20 at 23:12
chasly - supports Monica
7,2881 gold badge19 silver badges59 bronze badges
1
vote
0answers
118 views
How Do You Prove That This Puzzle Is Physically Solvable?
https://www.reddit.com/r/BeAmazed/comments/fyt7x9/it_seems_to_be_impossible_but_it_gets_done/?ref=share&ref_source=link
The goal of the puzzle is to remove the wooden stick from the jar by ...
1
vote
0answers
592 views
Decode this message to stop the destruction of Science!
An extremist religious organization called "The Redeemed Against Scientific Usurpation of God's Authority", or RASUGA, have converted the world's leading time travel researcher to their ...
1
vote
0answers
110 views
Filling a sudoku/latin square like array
Let us build a square array in the following manner, which I would like to call a modified sudoku:
1) Every row and column contains only one copy of a positive entry and there are exactly $t$ such ...
1
vote
0answers
255 views
ARG Puzzle Gate 15 Help
Me and my group (yes I'm in a group trying to solve this) are currently working on an ARG puzzle and we are stuck. The first image/clue to the entire puzzle is what is seen below. The creator of this ...
0
votes
0answers
123 views
Formula for the sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6,
The sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6, ... appeared in one of my tutorial sheets in 2019. I assumed that the fourth term, 21, was a mistake (was supposed to be ..., 2, 1, ...) then it made ...
-6
votes
1answer
173 views
Find the next number in the weird sequence
The following sequence has been made using a specific pattern and the last number is kept secret. We have to find that number along with the pattern followed to make the sequence.
3, 11, 32, 71, ...
