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Questions tagged [no-computers]

A puzzle designed to be solved without using calculators, online decoders or computer programming.

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4
votes
2answers
472 views

Solve for three distinct digits A,B,C - no programming please

$A$, $B$ and $C$ are three distinct digits between 1 and 9 (not 0). What are they if: $A + B^2 + C^3 = ABC$ (need three solutions) $A + B^2 + C^3 = BAC$ (one solution) $A + B^2 + C^3 = ACB$ (one ...
19
votes
3answers
2k views

We feast in Hell's kitchen, we swim through the deep

We feast in Hell’s kitchen, we swim through the deep, we wait in the shadows for printers to sleep. At midnight we come and we jumble your prose. We pluck out your words because god only knows! And ...
17
votes
2answers
1k views

Oh, woe is me, the creature's back

Oh, woe is me, the creature's back to give me certain heart attack! He's plucking words and shifting glyphs. What sort of devilry is this? I love the gates of hell; I’m kind of a rod (6) The apple ...
21
votes
3answers
3k views

Find 77777 solutions

You have three flat pieces, as shown: Arrange them flat, without overlap, such that the shape formed by the black parts is congruent to the shape formed by the white parts. Rotation and reflection ...
29
votes
1answer
2k views

A Secret Job . . . but what is it?

Mr. Peters, a freelance muscle-for-hire sort of fellow, had been manning his desk for days now waiting for something to do when at last the phone rang. A job! The nerdy sounding person on the other ...
-6
votes
1answer
261 views

The Puzzling Phone [closed]

The amazing "Puzzling Phone", comes in two models, one sold by "Super Puzzling Inc", and one sold by "Mega Puzzling Ltd" Phones need to have government testing before they can be sold on the market. ...
10
votes
3answers
965 views

A String-based Puzzle: Can you get from the string “baa” to “bacaccacacccc”?

Goal: Go from the initial string to the final string by applying a sequence of string replacement rules. You are given the following: Initial String - baa Final String - bacaccacacccc You ...
15
votes
3answers
353 views

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. ...
15
votes
1answer
1k views

Sum in A Sudoku

Color Blind version: Here's a sudoku puzzle with a twist! The numbers given in the squares are actually the sum of the numbers in that region. For example: 18= Sum of the numbers in the 4 yellow ...
2
votes
1answer
436 views

Chess : flawless victory

-warning : true story alert- In my high school years, I used to be in the chess club. One day, my friend taught me the famous 4 move win and told me how it was "the best, the fastest, most awesome ...
9
votes
2answers
266 views

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: ...
14
votes
2answers
645 views

A Trip to Ripple Islands

All aboard! All aboard! You have won an ALL-EXPENSES PAID TRIP to the magnificent Ripple Islands! Now, the only price of admission is to solve this little puzzle. It is a Ripple Effect puzzle based ...
4
votes
4answers
379 views

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 ...
13
votes
5answers
3k views

How often does a digital watch show a palindrome?

A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward or forward, such as madam or kayak. We have a digital watch showing the time HH:MM:SS as shown in ...
-1
votes
3answers
319 views

Fill in the Values [closed]

In the product of two two-digit numbers (' '7) × (7' '), there is same digit at both the blank spaces. What can be a possible answer to this multiplication?   $(\bf{A})\ 807\ \ \ \ (\bf{B})\ ...
11
votes
2answers
752 views

Happy 2017 Sudoku

This is a simple Sudoku. The only thing different from a regular sudoku are the symbols used: HAPY2017*. The snowflakes (a.k.a. asterisk) are like any other character. Wishing you a Happy New Year ...
10
votes
5answers
1k views

Consecutive Numbers Sum of a number

Consecutive Numbers Sum (or $CNS$) is the number of different consecutive positive integers' summation resulting to a specific number. For example; $CNS(45)=5$ $22+23=45$ $14+15+16=45$ $7+8+9+10+11=...
17
votes
3answers
305 views

Pairs of Pairs of Pentominoes

Split the 12 pentominoes into three sets of four. Can you pair up pentominoes so that each set makes two of the same shape? For instance, one of your three sets could look like this: That uses the L,...
3
votes
1answer
289 views

KenKen Zen: The Cluelessening

As our KenKen voyage of cluelessening­* began, some clues remained entirely hidden from us.  Though much remains to be discovered, we may now be entrusted with all clue amounts at once.&...
8
votes
1answer
1k views

Christmas Sudoku

CHRISTMAS IS COMING!!! And to celebrate, here is a Christmas related sudoku: *A friend gave this to me and it took a long time for me to solve it. Thaks to @GentlePurpleRain for providing an updated ...
12
votes
2answers
528 views

KenKen Zen: A journey begins

Let us shy away from the materialistic opulence of 361- cell KenKen layouts (−9 to +9, squared).  Let us contemplate a modest KenKen journey, unburdened by gratuitously ...
5
votes
1answer
718 views

Arrange numbers to 3 different math operations

Replace letters with numbers 1 to 9, so the 3 operations below are equals. Each letter represents one unique number. $$\frac{ab}{c} = de \times f = gh - i$$
41
votes
1answer
1k views

A cubic colored pyramid

While preparing the next puzzle for publishing, I decided to encrypt the file to protect it, but something went wrong or maybe I entered the wrong command because the puzzle was encrypted, yes, but ...
14
votes
2answers
670 views

The Etiquette Room

This puzzle can be solved as puzzle on its own, but its solution is also part of Deusovi's Community Metapuzzle. You wake up feeling rather dazed. Your head is pounding. Whatever just happened did ...
4
votes
1answer
158 views

Numbers at a flower-like circles

Above picture is a flower-like circles with digits to each intersection which follow the rules: A circle and its center must contain all of the digits from 1 to 7. I have put some numbers to some ...
46
votes
2answers
2k views

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 ...
12
votes
1answer
474 views

A broken mosaic of words

In this puzzle, you'll have to rebuild words using the "pieces" listed at the bottom and place them in the grid provided below. Some notes about this puzzle: The gray cells with the dotted border are ...
26
votes
2answers
2k views

RIDDÅL - another unfinished flat-pack puzzle

This is an entry to the 19th Fortnightly topic challenge Yesterday I got a package in the mail. Attached to its top was a letter: Dear Alconja, That's strange, I thought... Must have gone to the ...
14
votes
1answer
683 views

4x4 Sliding Puzzle with a twist

For this puzzle, you're given a three piece set as depicted below: A blue indicator peg A square 4 x 4 tile frame filled with 16 tiles A max.8 tile holder / dispenser Your task is to un-scramble ...
3
votes
2answers
951 views

What was my friend doing?

I asked my friend what he did last week and he gave me this note. ivoesfe ivoesfe ivoesfe hppe nfo hppe nfo uif tjohjoh sbjo pof gmfxdvdlppt oftu qbbnfsjdbosjt nvujozcpvouz ...
8
votes
2answers
367 views

Scanned Magazine Comics

This drawing was sent to me by a friend a few years ago. He said it is a kind of Mystery Case File but what to find is up to me figure them out. Is there something to find here?
47
votes
1answer
1k views

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 ...
10
votes
7answers
2k views

Last Digit of Multiplications

I have 4 different 1 digit positive integer numbers $(a,b,c,d)$. than I apply this formula $random(a,b,c,d) × random(a,b,c,d) × ... × random(a,b,c,d)$ the last digit of the result is always one of ...
20
votes
2answers
766 views

Honeydripping around the clock

      What path could a honeybee follow, beginning and ending at top center, visiting every empty cell exactly once and dripping 2 drops of honey into the last cell? Start ...
10
votes
2answers
302 views

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 ...
9
votes
1answer
279 views

H-one-one-oneycomb

        What path could a honeybee follow to fill all cells with honey, beginning and ending at the center and visiting every cell exactly once? At first the only ...
6
votes
3answers
842 views

ENLIST+SILENT+LISTEN = ANAGRAM

An anagram is direct word switch or word play, the result of rearranging the letters of a word or phrase to produce a new word or phrase, using all the original letters exactly once Solve this ...
3
votes
2answers
272 views

Find a Strobogrammatic number, so if we square it, the result is a pandigit number

Find a Strobogrammatic number, so if we square it, the result is a pandigit number. Note : A Strobogrammatic number is a number when typed on a calculator, and the calculator is spun 180 degrees, ...
10
votes
2answers
3k views

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 ...
8
votes
2answers
6k views

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. <...
3
votes
3answers
190 views

Honeycomb structure statements (T/F)

2 1 1 3 0 2 1 Above honeycomb structure contains numbers. A number at each cell represent a statement. x : This cell is surrounded by x True statements. ...
30
votes
6answers
2k views

A triangle formed of three letters

Consider a downward-pointing triangle of letters X, Y, and Z formed by the following algorithm. Start with a sequence of 10 letters each of which is X, Y, or Z. Under each row, construct the next row ...
7
votes
2answers
307 views

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 ...
2
votes
3answers
566 views

Multiply 2 palindromic alphametics to make a pandigital number

There are some different definitions of pandigital numbers, so to avoid misinterpretation, lets use this definition: Pandigital numbers (pandigit) are numbers containing the digits 0-9, where each ...
-4
votes
3answers
352 views

Bartenders' beer-table error-correction code

At a pub, a friend spotted our table number being 412; there were nowhere near 400 tables. We mused if it could include a checksum so the bartender could tell if customers gave an invalid number. I ...
5
votes
4answers
5k views

Special 5x5 Sudoku-like table

This is a special 5x5 Sudoku-like table. Each row, column, and diagonal contains digits from 1 to 5 (including diagonals obtained by wrapping around the edges). To filter duplicates (by rotation, ...
1
vote
2answers
223 views

modified 3x3 panmagic squares

This is a modified 3x3 panmagic squares. The square is divided into 2 triangles. Numbers 1 to 9 is arranged to upper triangles. Numbers 10 to 18 is arranged to lower triangles. All rows, all columns, ...
30
votes
4answers
2k views

Breaking the record

There is a record whose value is expressed by a natural number. (The value is strictly discrete, not only continuous and then rounded to a natural number.) However, after the record is once ...
8
votes
2answers
442 views

Alphametic as protest #2

Riddles for all. Since my latest alphametic as protest got a good feedback but my riddle as protest did not, I decided to stick to what works and added a new alphametic as a protest for the riddle ...
0
votes
4answers
553 views

Two opposite onramps one city [closed]

Is it possible to have two freeway on-ramps,(one going north and one going south), and have them both go to the same city?