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5
votes
1answer
31 views

Reconstructing the results of a 5-team soccer tournament

5 teams are playing in a "round-robin" soccer tournament, in which each team plays each other team once. Each game has 3 possible outcomes: team 1 wins, draw, or team 2 wins. The winning team receives ...
1
vote
1answer
27 views

See me from your view point - As see by the rest

See me from left, I appear as spectacles. See me from right, I appear as butterfly. See me from top, I will connect to just one. See me from bottom, I just a wave.
0
votes
0answers
28 views

Zed's E-mail: My Good Ol' Uncle Sugar

My friend Gabby and I constantly look out for each other. Just the other day, she received a strange message from what I thought was an uncle of hers. "Problem is," she started with a worried look, "I ...
0
votes
0answers
54 views

A spy in Fruitland [duplicate]

The army of the big and violent-prone country of Fruitland is planning to launch a nuclear rocket that could possibly destroy the near pacific little country of Vegetablesland. It is well known that ...
12
votes
1answer
455 views

Blue. Orange. Green. Magenta. What does this strange picture represent?

Is it text? Is it a face? Is it code? What is it?
5
votes
1answer
174 views

Party Time with Captain Pun

The other day my good friend Captain Pun invited me to a party on board his new boat. "What will the dress code be?" I asked. Captain Pun said he'd email me the details. Later that day I received ...
2
votes
1answer
105 views

A strange summation

I sum up S4; there exists a ⵢ8 How many numbers does this strange summation encode, and what's the encoding?
2
votes
0answers
67 views

Letters and numbers… Replace the question mark

Here's some letters and numbers. Find "?" (S,V):3::(U,K):16::(T,F):5::(L,K):5::(M,W):1::(I,O,M):? Hint1:
4
votes
1answer
95 views

A Coldport Christmas puzzle

Detective Inspector Playfair, an energetically boisterous policeman who often complained about Endeavour Morse having his own TV show, was sat on a bench at the side of Coldport's newly laid town ...
7
votes
1answer
517 views

Worst way to solve Rubik's in one algorithm

If you apply the same algorithm over and over again the cube will be solved. I want to know what algorithm is the worst one (the one with the longest cycle) I have found RU (cycle of 60 times) I have ...
6
votes
1answer
189 views

The answer to this puzzle is a three letter word

Easy riddle. Even kids should be able to get this. In the end, the answer to this puzzle is a three letter word and also a single letter. Ignore the Excel sheet lines
-2
votes
1answer
75 views

Number puzzle! Find “?”

Replace the question marks. 1, 1, 2, 3, 6, 7, ?, 11, 14, 19, 20, ?
10
votes
1answer
153 views

Prime to Prime Sequel

This question is inspired by the Prime to Prime puzzle. The first 24 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 Using up to 4 ...
0
votes
1answer
39 views

Encrypted text related to murdered Scottish king or queen [closed]

The following image should lead to a 4-digit numeric code. The hints given were as follows: and I've made some progress, but I have no idea if it's in the right direction, so I don't know if I ...
3
votes
0answers
153 views

Knights of the square Sudoku table

8 . . | . . . | . . 6 . . 4 | . . . | . . . . . . | . . . | 9 1 . ---------+---------+-------- . . . | . 2 . | . . . . . 9 | 3 . . | . . . . . . | . . . | . ...
6
votes
1answer
235 views

By what means does the King wage war?

A King over all The nations will fall His garment of white Its hem stained red The darkness made light For sinners he bled In one hand a sword The word of his power In the other a ...
3
votes
1answer
180 views

What is the 'Three Cube Problem' in the Mega Test?

The now defunct IQ Mega Test had a problem which was considered it's 'most difficult' called the Three Cube problem. Does anyone know what it is?
4
votes
1answer
195 views

Using burning ropes as timers

This puzzle is an harder version of a very famous one. It has been asked many times on PSE, but this time the question is slightly different (1) (2). So please read this question twice before marking ...
13
votes
1answer
195 views

Unpainted Masyu

Exactly 3 of 7 circles here should be painted black to make the Masyu uniquely solved. Find them!
0
votes
0answers
126 views

ARG puzzle, please help me with this

I know, this is going to look, and sound very confusing, but I'm participating in an ARG. The ARG, includes very difficult puzzles, and riddles that I cannot solve. I need your help, I will provide ...
29
votes
1answer
2k views

Twelve Labours - Conclusion

This puzzle is the FINAL part of the ‘Twelve Labours’ series, and contains spoilers for previous instalments, which can be found here: Prologue | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | ...
-4
votes
0answers
81 views

I need helping solving this very cryptic puzzle [closed]

I need help solving this very strange and cryptic puzzle. Puzzle Hint: I destroyed you though you need me Puzzle Text: ^8^#__|&|*'|%/'+|+'|+'&%|&|+%|+%|'%{'×'×%'₹|%*|%*₹^×₹^*₹×-:-÷:-÷×₹^|...
8
votes
1answer
295 views

Tile-laying for beginners

Coldport is celebrating having a new town hall by laying a tiled design in the public square in front of the building. The design is also square: $5\times 5$ tiles square, in fact, and features three ...
-1
votes
1answer
103 views

Find the lowest floor from which Venus eggs break [duplicate]

Venus gave you two eggs because she wants to test their strength. She lives in a 100 floor building and she wants to find the first floor above which the eggs break when thrown out of the window. ...
7
votes
1answer
221 views

The Newest Cycle

A wonderful new chess problem has appeared lately that is most wonderful. I am here to share it with the world today. But you must solve it in order know about it’s glory! It’s White to move and ...
-3
votes
2answers
139 views

What am I ? any guess? [duplicate]

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?
13
votes
2answers
233 views

A Knitted Puzzle

All handmade! Answer is a thematic word. Click here for colorblind assistance (regions with similar colors are indicated).
7
votes
1answer
607 views

Possibly unsurprising riddle

I'm really confused I sound like subtraction But really I've refused A positive action Who am I?
15
votes
3answers
2k views

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. ...
1
vote
2answers
157 views

If these equals… then what number is “?”

If, 7∆ + 11□ - 2□ + 1∆ = 36 12∆ - 8∆ + 8□ + 2∆ = 25 3□ + 17∆ + 5□ + 2∆= 289 then, 1□ + 7□ + 2□ + 3∆ + 17∆ = ?
-5
votes
1answer
58 views

Puzzles related to 1337: Puzzle 1 [closed]

Here's a set of puzzles related to 1337. The first one goes here: One digit for each question mark. $1337=1?×3×37+?$ This is pretty easy. Solve it.
1
vote
0answers
50 views

Input on a cipher? [closed]

So, I randomly stumbled across this cipher/code and I am pretty stuck and wondering if anyone had any input: 65706377 736D 797367 676B72687A67 74636D64 7161 B8B 78863B1F56468 767A796B 71 6C6E79657A ...
2
votes
1answer
111 views

Number missing! Replace the question mark

A number is missing. Find "?". ((13 19 4□)⁽⁷ ⁴ ⁻¹⁾□) + ((14 6 4□ 3□ 5)⁽⁶ ² ² ⁻⁴ ⁾□) + (4□ 13 12 5 23 5)⁽⁴ ¹⁰ ⁻⁷ ⁷ ⁻¹ ⁾ = ?□
2
votes
2answers
149 views

Three Tongues of Rock #2

Inspired by my last riddle: Three Tongues of Rock One is round He sings of dark art One with lips He gently caresses The third he sings Of men who wear dresses This one ...
6
votes
2answers
226 views

What game am I?

Can you work out what game I am? (My original puzzle): Head hung low in… (5) - Best card of the deck (3) Written much by peer and shakes, often read for the love it makes (6) - Certainly not pretty ...
13
votes
0answers
313 views

Witness intimidation

After solving this puzzle, I received an envelope in the mail. I opened the envelope, only to find three letters inside. The first one read: I know who you are I'm sending my greeting ...
8
votes
1answer
203 views

Maximizing Product of Selected Cards

Jennifer is playing a game. The Ace through King of spades are taken from a standard playing deck and laid out facedown on the table. At any time, Jennifer can select two cards and reveal them, and ...
3
votes
1answer
130 views

A game of cross-dominos

The grid above shows the final layout of a domino game played with a standard $28$-tile (dominos $0-0$ to $6-6$). The first domino played, the $4-4$ double is given, and solvers must complete the ...
8
votes
3answers
327 views

A box full of unfair coins

Lolek and Bolek are arguing on whose turn is to take out the trash. They have a box with $n$ coins. when the coin $i$ is thrown, the probability that it lands on heads is $p_i$. They decided to make ...
6
votes
1answer
129 views

Mathmatical equation answer [closed]

I think there must be a way to solve this but I can't get there Green + Blue = Yellow Red + Green = Purple Yellow - Purple = Red Red + Green + Blue = 9 I have made some progress And but I run ...
17
votes
2answers
1k views

Professor Pun's Personal Project

When I first met my good friend Captain Pun, he invited me to dinner to meet his wife, a physics professor at the university. Over a glass of wine I inquired into her research interests. "Let me show ...
-4
votes
1answer
222 views

How many eyes do we have? [closed]

If a giraffe has two eyes, a monkey has two eyes, and an elephant has two eyes, how many eyes do we have? The question is not guess work.. it has definite answer.
-4
votes
1answer
195 views

What’s the next number in the sequence?

I have a numeric sequence: 1,4,5,5,7,9,9,6,6,11,13,11,? What is the next number in the sequence and what pattern does the sequence follow? This sequence has to do with prime numbers and the sequence ...
7
votes
1answer
404 views

Dying for Caesar

Across 1. Smoothening the rest of the day? (7) 8. Tune's introduction omitted by exotic Croatian instrument (7) 10. Secretly agree to meet… (5) 13. …and not to be indoors every second (3) 14....
6
votes
2answers
652 views

Emblem gestures

Another puzzle in the spirit of the Density™ puzzle. Just monochrome this time I'm afraid. Enjoy! Final answer: (3, 4, 5)
9
votes
4answers
1k views

What comes next in this sequence, and why?

I'm having the hardest time with this sequence puzzle. The mobile game I play (which asked me the question) doesn't provide answers or explanations for incorrect answers, and I'm searching online so I ...
7
votes
1answer
200 views

A Bored Jailer and His Number Game

A bored jailer tells a prisoner that if he can guess a secret number he will be set free. The rules are given that the number will not be more than three digits in length and the prisoner may guess ...
-4
votes
0answers
137 views

What number should replace the question mark? [closed]

This is a question asked to me by my friend's kid: What number should replace the question mark?
5
votes
1answer
201 views

Two cards which product is not a square

There are 100 cards on a table numbered 1,2,...,100. What is the maximum number of cards, which can be selected such that no two cards have a product, which is a perfect square? Example: you cannot ...
22
votes
2answers
2k views

Mostly One Way Travel : Says Grandpa

"You know these tiny travelers?" says Grandpa "Billions of them! Born to travel. They have travelled to all continents, nations, and towns." "But they always need help, a chaperone so to ...

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