Questions tagged [no-computers]
A puzzle designed to be solved without using calculators, online decoders, or computer programming. Using a computer to type and post the answer is allowed; the spirit of this tag is to make people solve the puzzle on their own.
137
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Follow the path of relation through the grid #1
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
7
votes
1
answer
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Follow the path of relation through the grid #2
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
6
votes
1
answer
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Follow the path of relation through the grid #3
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
12
votes
2
answers
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Wormeus and the Pink Lady Stickotaur
Wormeus lives in a labyrinth containing lots of apples. His main ambition in life is to eat as many apples as possible but his nemesis, the evil Pink Lady Stickotaur, has other ideas – if you pardon ...
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1
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Follow the path of relation through the grid #4
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
20
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5
answers
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Square Spin #1: Sun and Moon
Defining Square Spin
Lets play a game!
The aim of this game is to transform one image into another using the least amount of moves possible. Here is what a move consists of:
...
- 2,897
15
votes
2
answers
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Barrel - Part 5
An entry in Fortnightly Topic Challenge #35: Restricted Title 1. Title based on this xkcd.
This is a continuation of Barrel - Part 1, Barrel - Part 2, Barrel - Part 3, and Barrel - Part 4, but this ...
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2
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Follow the path of relation through the grid #5
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
37
votes
1
answer
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Riley Riddles in Reverse
In the all-famous Riley riddles, you have to guess one word from clues about its prefix, infix and suffix. Here, instead,
You get three words.
You must find one solution word that you can attach.....
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35
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3
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First digit of 3^2020
Inspired by
The last digit for 3^(2019)
Can you find the first digit of 32020 without a computer?
- 33.1k
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7
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What number is that ? Asks Grandpa
"So here is a number between 1 and 60" Says Grandpa
"If you take its WORD anagram and subtract this number you will get
Anagram of the number - number > 5
What is that number"?
"So it is the ...
- 39.2k
18
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2
answers
894
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15
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3
answers
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Some-what-not-with-standing word connections
What words can fill the boxes?
Each pair of linked words forms an uncapitalized unhyphenated word
when joined end-to-start according to their left-to-right or top-to-bottom
order in the link.
...
- 21.8k
14
votes
2
answers
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PSE Advent Calendar 2021 (Day 4): Decorating with Ingrid Deduction
This puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation. < Previous Door Next Door >
"...
- 26.3k
14
votes
2
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937
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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, ...
- 21.1k
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2
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Alphabetical Sudoku
Who loves fish?
Okay that might sound a bit weird but don't worry, I am still sane.
Maybe.
To answer the question you must complete the Sudoku below. A word will appear in the highlighted box which ...
- 56.4k
11
votes
2
answers
840
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What is the probability that all the bullets will be destroyed?
A gun shots bullets with different speed each second.
The bullets form a straight line.
The bullets keep their speed (not getting slower or faster).
But if 2 of the bullets collide, 2 of them are ...
- 17.8k
7
votes
2
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Square Spin #2: Climb the Mountain!
Square Spin History: #1>#2
New Rules
This puzzle introduces two new square types:
Unmovable squares (Un)
Replaceable squares (Re)
Plus the concept of ambiguity!
Ambiguity of squares
Certain ...
- 2,897
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votes
2
answers
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Desert Wanderings bring…Ciphers? Part 2
Part 1 can be found here
Part 3 can be found here
As you utter your answer, along with its reasoning of course, the Sphinx clearly looks disappointed.
You are unfortunately… Correct. Clearly I made ...
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5
votes
1
answer
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Follow the path of relation through the grid #6
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
67
votes
2
answers
5k
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Sudoku like you've never seen it before
I've spent this week trying to create a difficult logic puzzle which is a combination of two Sudoku varaints, 'Samuari Sudokus' and 'Pseudokus', and this combo is unlike anything you can find online. ...
- 56.4k
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votes
5
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How can 3 queens control the white squares?
It is well known that there is no way of arranging 4 queens on a checker board in such a way that every square is occupied or threatened.
Now consider a slight variation where we only need to cover ...
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1
answer
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PSE Advent Calendar 2021 (Day 20): Candy Cane Sudoku
This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door >
So I was ...
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2
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Self-intro to mo-Roman numerals
Here come mo -Roman numerals — just like
Roman
numerals,
only mo’ so.
(Explained as we go.)
What number can spell itself in two different ways
...
- 21.8k
18
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7
answers
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Fully-Firstable Anagram Sets
Okay, first let's define some terminology:
Anagram - Oh come on, how are you on Puzzling.SE if you don't know this one?
Anagram Set - a list of words that are all anagrams of eachother, e.g.:
ACTS
...
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9
answers
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Solitaire Chess
A friend of mine got me Solitaire Chess for Christmas years ago. I set up the board below. Is it possible to solve it? If so, what is the solution? (No programs allowed- Use only your brain.)
Rules:
...
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16
votes
3
answers
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Prime to Prime: Get all first 25 Prime Numbers using up to 4 Primes
The first 25 Prime Numbers are
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
Using up to 4 prime numbers and the following mathematical operations, get all the 25 primes.
+ ...
- 39.2k
14
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9
answers
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Perfect Squares!
A question was asked in a mental ability test yesterday.
Write four distinct numbers with these properties:
1. Sum of each pair is a perfect square.
2. Sum of all four is also a perfect ...
- 7,262
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3
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Crossword gone overboard
This puzzle is part 24 of Gladys' journey across the globe. Each part can be solved independently. Nevertheless, if you are new to the series, feel free to start at the beginning: Introducing Gladys.
...
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11
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How many Strobogrammatic numbers are there from 0 to 99999
0,1,2,5,8,11,69,96 are Strobogrammatic numbers.
We call a Strobogrammatic numbers if:
When it is typed on a calculator, and the calculator is spun 180 degrees, the number visually looks the ...
- 17.8k
11
votes
2
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Find the 4-digit code!
An agent has created a 4 digit code from the result of a maths equation involving all the digits 1-9. We know where the number 3 appears in the multiplication, but not any of the other 8 digits.
<...
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How to fill a honeymoon
How can a honeybee visit all cells
exactly once in this crescent shaped honeycomb,
beginning at the bottom tip and ending at the top?
The starting cell, at ...
- 21.8k
9
votes
1
answer
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Wormeus and the Stickotaur (maze 2)
Here is another Wormeus maze, following a previous puzzle that is yet to go viral. Wormeus has to eat all the apples without dying a horrible squishy death at the hands of the Pink Lady Stickotaur.
I ...
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votes
2
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Word connection squares!
This puzzle is in the spirit of Word connections, but is a more elaborate version of the same idea.
In each puzzle, you have a square of seven words of the following form:
...
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1
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Simple Homeworlds puzzle
On this site, we have numerous chess puzzles. however, we do not seem to have any Homeworlds puzzles, the game of space kings (yes this can be tagged outer space thank you very much.)
Hence, here is ...
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Triangle with incircle [closed]
This question is from the German mathematics competition Känguru der Mathematik. In this competition students have to solve 30 mathematical tasks like this in 90 minutes without calculator. Actually ...
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Encoding Morse Code
The letters of a message are converted to Morse code, with a space between each pair of letters and two spaces between each pair of words. Each pair of elements (for example dot-space, dash-dash, and ...
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votes
1
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Follow the path of relation through the grid #7
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
4
votes
4
answers
419
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Word connections
I am trying a new kind of puzzle so feel free to leave constructive comments and opinions! Thank you!
The objective of this puzzle is to connect 2 words by using a chain of words that connects each ...
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votes
1
answer
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Follow the path of relation through the grid #8
There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can ...
- 2,296
2
votes
2
answers
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Tiling rectangles with Hexomino plus rectangle #2
Inspired by Polyomino T hexomino and rectangle packing into rectangle
See also series Tiling rectangles with F pentomino plus rectangles and Tiling rectangles with Hexomino plus rectangle #1
...
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2
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Tiling rectangles with Heptomino plus rectangle #7
Inspired by Polyomino T hexomino and rectangle packing into rectangle
See also series Tiling rectangles with F pentomino plus rectangles and Tiling rectangles with Hexomino plus rectangle #1
...
- 3,798
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1
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re-re-reCAPTCHA
Last Friday, I was feeling a bit sad because I hadn't earned much rep recently, so I decided to try this awesome sock puppet thing everyone's been raving about. I logged out of my normal Puzzling ...
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A 16 Clue Sudoku Puzzle (but the kings can't be in check)
An entry in the 19th fortnightly challenge...
Above is a 9x9 "chess" board with some pieces already laid out, your goal is to fill the board completely, following standard Sudoku rules (i.e. every ...
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2
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Can you stop the rambling rook?
This is a chess puzzle someone showed me a long time ago. If you already know this puzzle please give the others a chance to solve it first. This puzzle was originally created by Otto Gallischek and ...
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Five Slitherlinks
Solve five Slitherlinks, each with a unique solution.
Please say a word regarding (or show an image depicting) each solution method.
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41
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Unusual letter combinations
This is an entry in the Fortnightly Topic Challenge #41: Short and Sweet.
English spelling is very strange. Sometimes you encounter words with letter combinations that would seem entirely ...
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Word that is fun. Nine and one
Starts with a name, ends with a name
Starts with a charge, ends with a charge
Starts with an element, ends with an element
Would be fun to guess this one! (May be more than one?)
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