Unanswered Questions
49 questions with no upvoted or accepted answers
22
votes
0
answers
3k
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What does this mathematical operator do?
The solution to this puzzle is one I came up with when working on this puzzle: What is the answer of this math puzzle?
For two natural numbers a,b, can you figure ...
- 660
22
votes
0
answers
2k
views
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
11
votes
0
answers
406
views
What is a Freecell Word™?
This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.
If a word conforms to a special rule, I call it a Freecell Word™.
Use the ...
- 11k
9
votes
0
answers
476
views
The highest poem
I am three, often a person, always a digit, and also witout.
George POUST was his name.
Manufactured by Ford between 1972 and 1976.
YMCA was not my first team in my coaching career.
Theory of ...
- 11k
8
votes
0
answers
229
views
There are 49 cards here. Figure out what the seven facedown cards are and what position they're in
So here's the problem
"There are 49 cards here. Can you figure out what the seven facedown cards are and what position they're in?"
I have tried about everything in my math tool belt to try ...
- 10.3k
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
7
votes
0
answers
397
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 ...
- 1,006
6
votes
0
answers
536
views
What is a Sharp Number™?
This puzzle is based off and inspired by the What is a Word™ and What is a Phrase™ series started by JLee and their spin-off What is a Number™ series.
This was originally going to be a challenge for ...
- 210
6
votes
0
answers
511
views
Rare but Abundant in Hill and Hole
I am uncommon,
But a worthy goal.
Rare but abundant
In hill and hole.
Who am I?
You may already know the answer, so the task is not to answer the riddle per se, but to solve the following 'What is a ...
- 27.7k
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
0
answers
218
views
What are the red, white, blue (and green) numbers?
Some numbers have been partitioned into $4$ groups. You must figure out how the numbers in each group are related, and what separates the groups.
Red: $1, 3, 4, 9, 13, 14, 15, 19$
White: $5, 7, 10, 12,...
- 148k
6
votes
1
answer
306
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
223
views
"PRI" puzzle with line drawings, including some shapes
This is a "PRI" puzzle that was posted on a reddit question. https://www.reddit.com/r/cognitiveTesting/comments/1btdot2/has_anyone_got_any_hard_pri_puzzles/
- 10.3k
5
votes
0
answers
337
views
You might dream about this puzzle
Find the pattern between these sets:
1: right, clocks, wings, hearted, yourself, strings
2: psychopath, bishop, withhold, breakthrough, shoplift, hopefully
3: bird, Vienna, tempt, modern, armadillo, ...
- 2,158
5
votes
0
answers
263
views
The Jumbled Jaunts of Jormungandr
Jormungandr, the Snakebot of Doom has left New York. The world's armies and air forces have been decimated and cannot stop it. It has moved on from New York, and has flattened the following North ...
- 151
4
votes
0
answers
349
views
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
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 ...
- 18.9k
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
3
answers
392
views
4
votes
1
answer
660
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
184
views
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
3
votes
0
answers
181
views
Designing a new type of twisty puzzle
Recently, I was fiddling with my Rubik's cube and tried scrambling it only using R and U moves. I then tried to solve it using only R and U moves. I didn't use any cube rotations.
It was an ...
- 10.3k
3
votes
0
answers
230
views
Cipher my friend sent me
"The world is: ::: :#: : ::## :### / :##: ##: #:::"
My friend sent me it and said the use of the symbols : and # don't matter. It's the pattern that matters.
The hints he sent were:
(EDIT)
I worked ...
- 39
3
votes
0
answers
424
views
How to solve this puzzle?
I have solved the sudoku. Scratching my head on the second part. Any hints?
It is not picked from any competition. One of my office colleagues usually post these types of puzzles on emails for fun ...
- 39
3
votes
0
answers
453
views
Logical descriptions of logic puzzles
What notations are there to describe a logic puzzle format? Here, I'm talking about logic puzzles like Sudoku, Bridges, Kakuro, Tents; games with exact rules and an exact & finite number of ...
- 131
2
votes
0
answers
164
views
Sequence of shapes with lines and dot
This is another puzzle from Lanrt-F IQ test that was posted on Reddit
https://www.reddit.com/media?url=https%3A%2F%2Fpreview.redd.it%2Fmy-favourite-2-problems-from-lanrt-f-v0-58puclks5a6d1.png%3Fwidth%...
- 16.2k
2
votes
0
answers
197
views
What is the church secret?
This is really a request to make a puzzle. I am sometimes made to go to church. On the wall will be a series of what I would to think are secret clues and I would love to make a puzzle from them. The ...
- 7,845
2
votes
0
answers
522
views
Digerati IQ test
This question contains spoilers.
After making the Digerati IQ test (http://play.google.com/store/apps/details?id=cz.digerati.iqtest) there are three questions where I still don't know how they come to ...
- 10.3k
2
votes
0
answers
108
views
Used technique to solve web interface permutation used in linked answer
I would love to get to know how the user 'phenomist' came to his solution (Link) from a technical point of view. Of course I did tried it on my own. I used an interceptor to catch the HTTP request ...
- 21
2
votes
0
answers
1k
views
How to generate a Zebra Puzzle?
Zebra puzzle, is a very famous puzzle, where several statements are given regarding a group of people and some of their qualities, and the solver has to deduce all the qualities of each person in the ...
- 2,726
2
votes
0
answers
244
views
How to hide coded messages in kaleidoscopes
Has anyone ever made or ever heard of making coded messages using repeating patterns or colors in kaleidoscopes? I had the idea for a project and was wondering if anyone had any experience with ...
- 3,441
2
votes
0
answers
405
views
WITLESS Inscription 5
2 days ago, TheGreatEscaper had to take down Inscription 5 of WITLESS - A Puzzling Journey, due to (can you clarify TheGreatEscaper?) the lack of a solution.
Can anyone think of a valid Inscription ...
CommunityBot
- 1
1
vote
0
answers
119
views
Progressive matrix puzzle with circles and dots
This item was posted on reddit and there is not a clear explanation for the solution.
https://www.reddit.com/r/cognitiveTesting/comments/1dgkakw/answer_and_explanation_please/#lightbox
- 10.3k
1
vote
0
answers
222
views
Logic puzzles: Flags and Stripes
Puzzle 1
Puzzle 2
Clues
The only instructions given to solve this is that the answer can be alpha-numeric text.
Ideas
Puzzle 1:
3 flagpoles seem to have top-balls (called a truck), while 3 don't
...
- 149
1
vote
0
answers
171
views
Two number patterns (clue: or geometrical shapes)
Solve the series:
Series 1:
6 and 1
5 and 2
4 and 3
5 and 1
???
Series 2:
6 and 1
5 and 2
5 and 1
4 and 3
???
- 181
1
vote
0
answers
289
views
Find how this finite sequence completes
7 14 31 51 70 81 104 107 129 149 155 175
192 215 238 259 279
299 301 301 314 328 350 372
Inspired by the discussion with the author of, and the clues to its solution are in that discussion: What ...
- 3,036
1
vote
0
answers
1k
views
What are the patterns in these two matrices?
I found these puzzles on https://iqmentor.io, and could not figure out the solutions to them. Any thoughts?
I also posted this on Reddit. Including the link here in case you'd like to see more people'...
1
vote
0
answers
159
views
Arranging shapes into a similar shape
The goals if possible.
Goal 1.
In the image there are 12 shapes each containing 15 cells.
Take any 3 shapes from the set and arrange them into any new shape, 2 example shapes that you could use are ...
- 621
1
vote
0
answers
547
views
MARRIED : 47 :: BLESS :?
I am preparing for a competitive exam, and I am stuck on this problem which I found in one of the practice test.
I found this question on tcyonline. The practice test is not accessible to everyone. ...
- 117k
1
vote
0
answers
165
views
How would you solve the following Matrix Puzzle by u/---Kyu---?
I've been staring at this puzzle for too long, but I cannot get how it was solved.
Based on the comments in the thread, a user identified that Number 1 is the correct answer, with the comment by u/---...
- 812
1
vote
0
answers
313
views
What are sequences of letters/symbols for creating a cipher?
I have two gears with different numbers of teeth (20 and 10):
The small gear makes two turnovers, while the large gear makes one turnover only.
My idea is to use a large gear as an alphabet wheel (...
- 10.3k
1
vote
0
answers
283
views
What is the most appropriate clue here?
Background. I'm specifically interested in how to design a puzzles chain for a team (8-10 teenages). We are going to play at a Scientific Museum. The main the idea is to find a key and open a lock.
...
- 13
1
vote
1
answer
189
views
Puzzle with crosses and boxes
This is a question asked from a Reddit user
https://www.reddit.com/r/iqtest/comments/1drjv9i/what_do_you_think/#lightbox
- 39
0
votes
0
answers
175
views
How to create a big, but good Hidato puzzle?
The goal of Hidato is to fill the grid with a series of consecutive numbers adjacent to each other orthogonally or diagonally, and all tiles are required to be filled in.
So, as you may or may not ...
- 2,423
0
votes
0
answers
459
views
What is an EQÜAL WORD (patent pending)
An EQÜAL WORD (patent pending) is a special type of word. You'll know it when you see it.
Here are some examples, sponsored by the original, @JLee! It’s based off of the "What is a ___ Word" ...
CommunityBot
- 1
0
votes
1
answer
203
views
Good cipher with a "password"?
I'm starting to create a puzzle, but I'm going to need a cipher that will be impossible (or at least very difficult) to crack, but can be easily decoded with a key. I first looked at the one-time pad ...
- 1,863
-1
votes
2
answers
369
views
Fill the blank with an image that fits into the given set
I tried to make them not too boring. The intended solution is very hard so I tried to slightly hint at it by implementing multiple solutions that lead to the same answer. I also tried to make more ...
CommunityBot
- 1
-3
votes
2
answers
421
views
The next term is?
A sequence of integers between 0 and 9 is as follows:
5, 8, 1, 0, 1, 8, 6, 2, 4, ?
What is the next term?
Hint:
- 19
-4
votes
1
answer
160
views
The New Mega-Splitter™: What's Next?
Here we have the great pyramid. The brand new 50-50, Out-to-In Mega-Splitter™.
Fill in the question marks with the next numbers!
All the hints you should need are in the question!
- 10.3k