Unanswered Questions
39 questions with no upvoted or accepted answers
22
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0
answers
2k
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REALLY important days in history
@Z. Dailey asks a mathematical puzzle Important days in history... and to come! with a series of dates in years 1973, 1978, 1983, 1992, 2005.
My puzzle asks the question: What is the previous date in ...
- 197
8
votes
0
answers
201
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.
- 8,333
6
votes
0
answers
254
views
Sequence puzzle: 3, 9, 27
A twist of the classic sequence game:
A friend asked me to find the rule to this sequence: 3, 9, 27.
I am allowed to suggest other sequences to test if they follow that (unknown to me) rule, to which ...
- 10.3k
6
votes
0
answers
186
views
How many items are there in the lab?
I am looking for how to complete the following question so that it gives a unique solution. Maybe somebody can give a visual solution.
A lab contains experimental equipment. 24 items are ready to use ...
- 117k
6
votes
1
answer
307
views
Creating accessible crosswords
Often, crosswords* posted to Puzzling have at least one of the grid or clues in an image. For visually impaired, blind, and/or screen-reader using people, or those who can't see images for some other ...
- 15.4k
5
votes
0
answers
178
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Handmade number sequence puzzle: 14, 8, 98, 86, 58, ?, 34, 15,?
Hello ladies and gentlemen, I have crafted my own number sequence puzzle.
14, 8, 98, 86, 58, ?, 34, 15, ?
Hint:
- 659
4
votes
0
answers
234
views
The smallest number
Some time ago I created a program to generate a table, and printed the first seven rows and columns.
Somehow however I forgot to print the headers and the title of the table.
I only remember that it ...
- 229
4
votes
0
answers
349
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Do minecart puzzles like this, with buttons that rotate track, exist?
This is the end result of me messing around with minecarts and moving floors.
The buttons change the orientation of either their nearest or their same-color track. Now I'm not asking you to solve the ...
- 143
4
votes
0
answers
158
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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 ...
- 18.9k
4
votes
0
answers
828
views
Number Sequence Series-Question 7
This is a series of questions that are created by me.
Here is question 7:
(23)，(55)，(155)，(1255)，？，？，(56139611)
I will give a hint to you guys in one month if nobody can solve it.
- 37.6k
4
votes
0
answers
90
views
How to create a puzzle from a pre-existing, fixed data source?
Examples of what I mean:
Instructions lead puzzlers to a library where the names of donors are inscribed on bricks out front. Along with some piece of information that is given to them on a piece of ...
- 2,124
4
votes
0
answers
546
views
Binary puzzle in World of Warcraft
I apologize if this isn't appropriate here, but it's been driving me insane. Essentially, a puzzle was recently introduced in the video game World of Warcraft, which no one has been able to solve. ...
- 35.6k
4
votes
1
answer
561
views
Formula for the sequence 1, 1, 1, 21, 3, 1, 4, 1, 5, 1, 6, ... if the 21 isn't a mistake
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 ...
- 10.3k
4
votes
1
answer
690
views
Find next element of the sequence
Source of the question: Taken from the sub-Reddit r/askmath here: https://www.reddit.com/r/askmath/comments/15ar3ne/looking_for_the_answer_to_the_following_sequence/
What is the next element of the ...
- 4,057
3
votes
0
answers
186
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Seeking Software to Convert Line Drawings into Connect-the-Dots Puzzles
I am on the lookout for a software solution, whether free or premium, that is capable of transforming line drawing images into connect-the-dots puzzles. My interest lies in both vector and bitmap ...
- 2,423