Unanswered Questions
22
votes
1answer
392 views
The life of a Knight: Conway style
So I was thinking about Conway's game of life and the ridiculous kinds of patterns that can be made (Things that move across infinite space etc) and then I thought, hey could a chess knight do this as ...
21
votes
0answers
1k views
Neurotic frogs ought to relax in mud baths
What is the hidden message in this advertisement?
Neurotic Frogs Ought To Relax In Mud Baths!
Perpendicular lounging calms. A frog, a mud cap... bliss! Wallowing generates happiness. ...
9
votes
0answers
450 views
Unsolved Mysteries: D'Agapeyeff cipher
The D'Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of "Codes and Ciphers", an elementary book on cryptography published by the cryptographer Alexander D'Agapeyeff in ...
8
votes
0answers
394 views
Some Stratospherically Strenuous Sudoku
These three sudoku are particularly irksome, can you logically deduce the solutions to all (or any!)
...and provide your reasoning?
They are all proper sudoku - each has a unique solution.
They can, ...
8
votes
0answers
309 views
Some of our Professors are Missing
It has emerged that four members of the mathematics department at Farthingbottom School have been working on a top-secret code-breaker for the government.
Unfortunately for them (and the school) ...
8
votes
0answers
437 views
Sufi Number Square
Years ago I was gifted a copper number square by a Sufi mystic. I have puzzled over its significance for all these years and still haven't been able to find a suitable answer. The number square is a ...
8
votes
0answers
207 views
Clear board in Othello (Generalisation)
Based on Clear board in Othello
If we have an $2m\times 2n$ Othello board ($m\geq n\geq 2$), and the
centre $4$ squares have the usual starting position, then for what all
values of $m$ and $n$...
8
votes
0answers
542 views
The Beale Papers
The background to this one's given here: http://www.damninteresting.com/89-263-201-500-337-480/
NB: These may not be a genuine cryptograms (current thinking is that these are gibberish); but I though ...
8
votes
0answers
872 views
Binary cryptogram from a friend
My friend sent me a "puzzle" in binary, and said that there are multiple steps to solving the puzzle, all of them including decryption. I translated the binary into text and he said that was a good ...
7
votes
0answers
395 views
Domino Gridlock
We have a 5x5 grid:
We also have some dominoes, 1 of each type with numbers 1 to 6 on each side. So we have the dominoes
1 | 1
1 | 22 | 2
1 | 32 | 33 | 3
1 | 42 | 43 | 44 | 4
1 | 52 | 53 | 54 | 55 ...
7
votes
0answers
612 views
Let's deal with “Names in Boxes” Safely
I met a puzzle, which is basically well known 100 Prisoners' Names in Boxes , but... it has an algorithm, which gives prisoners 100% chance to survive!
This is achieved by a small change in the ...
6
votes
1answer
32 views
Find the identity of the four troll brothers
The four troll brothers Wudhor, Xhaqan, Yijlob and Zrowag have the following properties:
Wudhor always says the truth.
Xhaqan always lies.
Yijlob lies or says the truth unpredictably.
...
6
votes
0answers
399 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 ...
6
votes
0answers
584 views
Is there a move-efficient way to rotate the center pieces on the Octo-Star?
I'm looking for a better algorithm to rotate the center column of the Octo-Star puzzle 45 degrees.
The situation below occurs when four properly-oriented edges are next to each other, allowing for ...
5
votes
0answers
190 views
Ciphertext Puzzle
A friend gave me this and challenged me to decipher it.
1tg2Qi8we6Lr4de3ro
3nl1pe7ot8lm5kk9in
...
