Unanswered Questions
392 questions with no upvoted or accepted answers
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General Approach to Solving Cryptarithms
I have recently started honing my problem-solving skills, starting with number-related puzzles. Cryptarithms have appeared frequently, so I was wondering whether there is some sort of general approach ...
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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. ...
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Cryptogram with one frequent letter and other letters random
I arrived at this ciphertext as a result of a particular decryption step from the famous unsolved "Kryptos 4" cipher. It has a very unusual letter distribution:
?...
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Is the OP on mushrooms?
What two words am I looking for in the puzzle below? (The title too is a clue).
35437
When a Deity sees its reflection,
Clip the best of rediscoveries approximately.
Blow has been blown when it is ...
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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 ...
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Smallest Unattainable Target in Letters and Numbers (Countdown in the UK)
To cheer myself up during the twin problems of (1) underperforming sports team XXX and (2) lockdown in state YYY, neither of which shall be named, I am doing daily number puzzles based on the show ...
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Spider Solitaire - Minimum Guaranteed Turnovers
Consider the following game-state in Spider Solitaire. Although this game is not the most popular compared to others
(e.g. poker, chess, backgammon etc) I assume the reader is familiar with the basic ...
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Building a cube from small bricks such that no lines can be pushed through between the seams
There is a puzzle on fault-free rectangles tiled by dominoes. It is rather known (it is described in Martin Gardner’s “Mathematical puzzles and diversions”, see here) and rather old (it is known at ...
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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 "...
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How do you force a win in 4x4x4 TicTacToe
I have read in the wikipedia page of TicTacToe that it is possible for the first player to force a win in a 4x4x4 board. I tried to find a strategy on how to do it online but failed. So, how do you ...
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Find the next term in the given sequence
I created this puzzle.
The sequence is as follows: $$320, 71,4632,1E3D, 84B7, 6154, 4F3A44, 38B12, 11F1, BE7E44$$
Find the next element in the above sequence.
Hint 1:
Hint 2:
Hint 3:
Hint 4:
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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/---...
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Word lists for general knowledge crosswords
When using software to create a grid for a cryptic crossword, most general-purpose word lists will do because you want most of the answers to be headwords from a dictionary. But I'd like to compile a ...
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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 ...
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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 (...