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vote
1answer
26 views

Two untrusted traders

I'm sure this has been asked before, but I tried searching and couldn't find it. I don't know the solution, and it is possible there isn't one. There is unsavoury pirate and an unscrupulous merchant....
1
vote
1answer
16 views

How Should I Go About Answering Square Spin Puzzles?

The Square Spin series of puzzles is a bit abstract. There is quite a lot for newcomers to digest and getting started may be daunting. Even if you thoroughly read the rules and intend to attempt one ...
1
vote
2answers
96 views

Coin around shapes: A Geometric paradox?

Here is a circular coin with diameter D Figure A From its starting position the small coin goes completely around a bigger circular body of diameter 4D without slipping, always in contact ...
9
votes
1answer
560 views

Everyone but three

For the first time, a photo was taken with every person, living or dead, in frame. Everyone that is except for three. Who were those three?
-2
votes
0answers
110 views

“Strange babies ate raspberry pancakes,” sad daddy says. “Worth million dollars.” Tyrannosaur investigating [on hold]

I am absolutely stumped at this one. There should be a ~1-5 word answer that is somehow hidden in this. the one thing that I can see is that "Worth" and "million" are the only words that don't contain ...
3
votes
1answer
108 views

need help in solving burr or cube puzzle

I have a 8 piece wooden puzzle that I found in a yard sale that I can not figure out. All pieces are the same thickness. Please see photo Thanks for all help. Sorry about the last post, new here ...
9
votes
6answers
977 views

Wordplay addition paradox

There are words from which you can remove a "chunk", leaving a new word. Like this: ...
5
votes
3answers
565 views

Wordplay subtraction paradox

There are words from which you can remove a "chunk", leaving a new word. Like this: ...
4
votes
1answer
185 views

5 Negotiating Pirates Puzzle

5 pirates of different ages have a treasure of 100 gold coins. On their ship, they decide to split the coins using this scheme: The oldest pirate proposes how to share the coins, and ALL pirates (...
7
votes
2answers
181 views

Nono-cube - Ultimate Puzzle Giant

Prologue - Instructions Shamelessly copied and pasted the following from @jafe's puzzle :P This is a three-dimensional nonogram. The first square gives the enumerations for the Z-axis, top to ...
14
votes
1answer
1k views

Cover a cube with four-legged walky-squares!

This is a four-legged walky-square: This shape has an interesting property: It is possible to map multiple copies of this shape onto the surface of a cube in a way that perfectly covers the entire ...
-4
votes
0answers
50 views

burr or cube puzzle need help on solving [on hold]

Have a 8 piece wooden puzzle that I can not solve. 8 separate pieces, all the same width, suppose to make a cube. Please help.
13
votes
1answer
694 views

Four-dimensional light bulbs

In reaction to Three-dimensional light bulbs - rules are same (almost) This is a four-dimensional Akari puzzle (also known as Light Up). The nine squares represent the layers of a $3\times3\...
6
votes
0answers
130 views

An Unusual Amount Of Help

Another day, another helpmate to solve! Here's a really complicated one! The Black pawn on Black's first rank moves like a normal Black pawn. It's White to move first. Given that White moves to ...
6
votes
1answer
224 views

Cube Scrambling

Take a normal 3x3 rubiks cube (the Classic unmodded cube). I know the WCA method for scrambling is to pick a random (valid) cube state and calculate a sequence of moves to go from solved to that state,...
20
votes
1answer
1k views

Farmer needs to get his word across the river

In the spirit of the classic river-crossing puzzles: ...
5
votes
2answers
139 views

The Binomial Elks Club

The Binomial Elks Club For many months, Bill Gates had heard whispers of an exclusive club for the super rich, but when pressed, no one would provide any details. The secrecy surrounding the club ...
20
votes
1answer
2k views

Getting one over on the boss

In my job as a poet for a national newspaper I am rarely faced with ethical decisions. However, today was quite a challenge… The editor came to me this morning and said, “Hey, I’ve heard about this ...
3
votes
1answer
232 views

Need help with an online puzzle / riddle

I found this online riddle at m4tr1x.ws, but now I am stuck. It seems you need to gain deeper and deeper access to this virtual Matrix-style computer system. First you need to create an account via ...
10
votes
3answers
895 views

Mechanical puzzle ID: Ring, barbell, and four-holed panel

Hello everybody, Has anyone ever seen something like this? I don’t even know what I should do with the puzzle... Any suggestion or help is welcome!
21
votes
1answer
2k views

What happens on Day 6?

My friend, who works in a Library, has recently learned about Puzzles, in general, and Puzzling Stack Exchange, in particular. He was excited and has sent me this puzzle to "test" the users of PSE. ...
4
votes
1answer
211 views

Here's a riddle, so listen up yo

I'm from Italy, yet I speak English On top of that, my name is French I hail back from the late nineties galore Last in 2016 did I release lore Until then it has been a decade But we never truly ...
9
votes
1answer
277 views
+50

Dear ___________, this one's for you

Assemble, fine puzzlers, and hear my tale I promise, I won't be long You've seen many puzzles, and tried to prevail Some were right, and many were wrong. Today I give you a new ...
0
votes
3answers
117 views

Crypt Arithematic problem

Solve this Alphametic puzzle    T H I S + S I Z E ========= S H O R T
10
votes
1answer
605 views

Three-dimensional light bulbs

This is a three-dimensional Akari puzzle (also known as Light Up). The six squares represent the layers of a $6\times6\times6$ cube, top to bottom. The objective is to add light bulbs into any number ...
-2
votes
1answer
90 views

What is the answer to this analogy? [on hold]

I was doing some questions and got stuck on this problem. Gamble is to risk as... a. hazard is to peril b. plot is to predict c. force is to reject d. embrace is to encroach ...
50
votes
2answers
6k views
+100

Can you perfectly wrap a cube with this blocky shape?

The following blocky shape: can be folded onto the surface of a cube in a way that perfectly covers the entire cube with no gaps and no overlaps. How can it be done?
8
votes
2answers
281 views

An Ode Full'a Herrin's

Dear smart friend, How witty sire alway look! Here's ag'in an ol' ode, For you, fiend, a puzzler's game! Demeanour means imp's English name introduction. Small film halves film ...
6
votes
5answers
381 views

What is my name? It's not “traveler”

The answer to this puzzle is my first name. What is it? If no progress is made after a week or so, I'll slowly give hints. It's not too hard of a puzzle, so long as you take everything into account. ...
6
votes
1answer
496 views

Chess Construction Challenge #2-Check!

Xit's time for round two! Given that: -Black has 6 pawns and a king -White ehas three pieces of any kind you to deduce the identity of and a king Construct: -A nlegal position in which both sides ...
0
votes
0answers
50 views

Word problem help regarding Sin and angles [on hold]

My teacher gave me this problem. There is a triangle with angle with 30 degrees (so opp/hyp = 0.5) This specific triangle has an area equal to it's perimeter. All I got furthest to was that hyp is ...
-1
votes
6answers
334 views

How did the prisoner escape from the police car?

The police handcuff a prisoner, place him in the back seat of a four-door sedan police car, and close all the doors. The controls in the back seat are disabled so the prisoner cannot use the inside ...
5
votes
0answers
125 views

Unfold a right angle pyramid into a square

This puzzle refers to a feature of right angle pyramid: The relation between the areas of the three perpendicular faces and the diagonal surface area is given as - $S^2_x+S^2_y+S^2_z = S^2_d$ ...
0
votes
0answers
47 views

Given n sets of varying length of input numbers, find possible sum solutions for a given output [on hold]

Not sure really if this fits into the category of a puzzle, but its an abstract problem I'm trying to solve for a side hobby of mine and would appreciate your input on it! Inputs = [set1, set2.... ...
5
votes
1answer
150 views

Translate a new language

You are given the task as translator for a new language. There is no dictionary but you are given the following translations to help you. kisha dogafam kotirash ‘Someone has shot the squire.’ ...
31
votes
3answers
3k views

Is this more than a packing puzzle?

I bought this set of wooden blocks at a garage sale today, and although it was a challenge to fit them in the box, I suspected they were more than just a packing puzzle. Can you guess what else they ...
2
votes
2answers
174 views

Minimize sum of guesses to win lottery

Ten boxes are given with $a_1,a_2,a_3,a_4,a_5 ......a_{10}$ number of balls in them respectively .These boxes are randomly ordered but $a_1,a_2 .....a_{10}$ is told.We can arbitrary select a box and ...
3
votes
1answer
200 views

Military Weapon System

To access the Military Weapon System we need to enter a multi-language password with a keypad. There is a clue for the above selection and we can front attack it but maybe there is a trial limit. ...
9
votes
1answer
189 views

Measuring mystery distances

Some puzzling distances: If 110 to 39 is 1046km And 105 to 115 is 114km Then how far is 97 to 38?
8
votes
2answers
282 views

Square Spin #4: Rude Awakening

Square Spin History: #1>#2>#3>#4 New Rule This puzzle introduces a new square type: Lonely squares (Ly) Lonely squares This type of square contains a box and it is ...
8
votes
0answers
195 views

She went… She stayed

In 1969, she went to Kazhakstan. She stayed $1$ year Then she went to Mongolia. She stayed $1$ year In 1971, she went to ...
3
votes
3answers
670 views

Find the wrong number in the given series: 6, 12, 21, 36, 56, 81?

The following problem was given to me by one of my friend: Find the wrong number in the given series: $$6,\, 12,\, 21,\, 36,\, 56,\, 81 $$ ? A) $21\,$ B) $12\,$ C) $36\,$ D) $56$ and ...
18
votes
1answer
653 views

Bob's unnecessary trip to the shops

Alice and Bob live in London, UK. On a Friday, as per usual, Bob leaves for work before Alice. At lunchtime he receives a WhatsApp message from his friend Charles: Sorry to cancel on you last ...
0
votes
0answers
58 views

Find the missing number in the grid [closed]

Help! I'm trying to figure out this question and I can't do it. Am I brain dead?
2
votes
0answers
53 views

The ultimate conversion of a square into right angle pyramid

This is a follow up of other puzzles. Here a general case of which the other cases are a subset. Given a square of any size, cut it into four pieces to be reassembled into a right angle pyramid (the ...
7
votes
2answers
186 views

A “Simple” Task

Here's a "simple" task for all of you solvers out there: With White to play first, and with both sides working together to checkmate White, aka a helpmate, what is the quickest way for Black to ...
8
votes
1answer
138 views

Pure 3D Crossword

This puzzle was made as requested by EKons, here. So, enjoy this three-dimensional realistic sensation!
2
votes
0answers
85 views

What should be the missing number? [on hold]

What would be the missing number?
3
votes
0answers
90 views

How to find number of times sequence element $1$ is approached and from where?

Suppose i have sequence 1,-1,-1,-1,-1,-1 ........-1 .Now i start jumping from first sequence element (i.e 1 in this case) to next one .If i jump from 1 to -1 then element -1 will remain as it is.if i ...
11
votes
2answers
592 views

Back to the nineties!

I've left the world before the 90's, But I'm still many a ninety. Inside me there's an instant, I've proposed many a constant. My universe is not stable, But I'm still there at the table. ...

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