All Questions

-7
votes
2answers
84 views

Time detective duty

Consider that you have a beautiful wife (husband). But your after-marriage life is not so beautiful. Your wife (husband) has performed a first adultery act 5 years after a marriage with you and later ...
1
vote
1answer
48 views

What's the solution of this Raven's matrix? (2) [duplicate]

here's another matrix which I don't understand: What's the solution and why? Thanks!
14
votes
1answer
1k views

Can you cover a cube with copies of this shape?

The following 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 cube with no gaps and no ...
12
votes
3answers
1k views

Catching a robber on one line

At x = 0, a thief robbed a bank. The thief ran one of two known directions at a constant speed, towards x < 0 or towards x > 0. The cop arrives at the crime scene some unknown time after the ...
6
votes
2answers
161 views

Preparing for the End - Riddle

This is the end. I knew it was coming. All of my ends are tied up, I'm ready. Only a few more minutes to spend. I blame you for this. You killed the messenger. I strained and cried ...
0
votes
0answers
53 views

Distinct SemiPrimes with Close Factors

I'm in the midst of developing a game for several friends as a friendly competition. It begins with generating the largest distinct semiprime feasible with factors that closely related in length ...
5
votes
4answers
174 views

Problem with heights - Riddle

I hate heights. As soon as I can see how far away the ground is, I'm filled with this uncontrollable fear and urge to get down -any survivable way to get down is better than this. My captors seem ...
-2
votes
0answers
65 views

SOLV for Narcissistic UVC

This puzzle highlights some cyclic power Relations. Please provide detailed reasoning of derivation of digits from various power relations given below: $Given$: $A$, $C$, $L$, $N$, $O$, $S$, $U$, $...
12
votes
7answers
420 views

10 coins, 3 of them are fake

Inspired by some great weighing puzzles here (This being one of my favorites), I just made another weighing puzzle - I'm not quite sure how difficult or easy this one is. You are given 10 coins, 7 of ...
5
votes
2answers
221 views

A Fairy Chess Ladder

This is yet a fairyly ordinary word ladder on the chessboard. Sequence: PAWN > KNIGHT > ROOK > QUEEN > KING Rules: Each step you can do ONE of the following: 1) Add a letter 2) ...
5
votes
1answer
115 views

Any Volunteers for Card Counting?

You are given 2 matching card decks with Aces, Kings, Queens, Jacks removed. Now each deck has 36 cards. One deck is shuffled and placed on top of the other deck. Starting from the top card, you ...
-1
votes
0answers
49 views

Array rotate and delete [on hold]

Based on the problem in GeeksForGeeks here. I came across a solution here. The question is as follows ...
0
votes
0answers
62 views

Maximize sum of a Bipartition [duplicate]

We have a sequence of numbers say X. The goal is to divide this sequence into 2 parts such that the sum of the Greatest Common Divisor(G.C.D) of both the sub-sequences is maximum. Note : The G.C.D ...
11
votes
3answers
358 views

How many possible starting positions are uniquely solvable for a nonogram puzzle?

This type of puzzle goes by many names: Nonogram, Picross, and Griddlers are all mentioned on the Wikipedia page, Simon Tatham calls it Pattern, I was introduced to it as Descartes Rainbow, ... The ...
13
votes
4answers
2k views

Leveling up and Getting Items!

You are playing an online RPG game with 9 friends of yours (10 people in total) and in the game, there is a 2-player dungeon where you level up every time you enter and complete it. Only up to two ...
0
votes
0answers
92 views

A series of blocks (total $n + m$) is given to us and 0 is stored initially in each.We are given a number $H$ and we can choose $H$ blocks at a time

Operation - we can choose $H$ blocks at a time and can fill those blocks with digit 1. we can do this Operation as many times we want. if block has already 1 in it and we are going to put 1 again then ...
17
votes
1answer
714 views

A Tale of Snake and Coffee

I had the strangest dream last night: I am in field of red stones. I start walking around until a smell of fresh coffee catches my attention. I follow it until I see a large cave, and in its ...
2
votes
2answers
70 views

All the Signs point to the Second Prime…Figure out the Missing Digits

$Given$ The six Interrelated Equations A, B, C, D, E, F All equal to 3. Allowed Digits.. 1 to 9. All the missing 9 are distinct...9?s...9 Different Digits Fillin all the digits that satisfy all ...
-4
votes
1answer
99 views

Prime Sequence…a little bit Unusual about the Missing Members

What are the Missing Members in this Prime Series? what is the Significance of this Sequence? $19$, $17$, $13$, $?$, $?$, $3$, $2$
0
votes
1answer
152 views

Riddle me this!

I flew on a lark, sang on a trill, crashed on a wing. What am I? I've tried to figure out this riddle posed in a comic book. There was no official answer, but it is visually suggested that it is ...
2
votes
1answer
92 views

Musical Chairs Cipher: Double Trouble

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
5
votes
1answer
112 views

All Raised to the Power of U

$Given$: C, I, L, U, V are all distinct digits and can vary from 0 to 9. $LIV$, $UVC$ are concatenated Numbers. $U^U$ + $V^U$ + $C^U$ = $UVC$ $L^U$ + $I^U$ + $V^U$ = $LIV$ Solve for all the ...
-6
votes
2answers
82 views

Math to Math Nerdy Love Expressions…Fillin the Blanks [closed]

1) My Love for you is like $L= m.C^2$...because it grows xxx with speed of xxxx. 2) My Love is like a xxxx it goes on xxxxx. 3) You must be the xxxxx xxxx of xxxxx because I feel irrational ...
6
votes
1answer
110 views

Who am I ? [ Not in Stack Exchange ;) ]

$\color{blue}{\text{My first name}}$ $\small\bullet$ Prefix is a country, but I don't belong to there $\small\bullet$ Infix is the name of a saint $\small\bullet$ Suffix is a preposition $\...
-5
votes
1answer
114 views

Rhyme with Time

Commonly used units of Time are: $Second$ $Minute$ $Hour$ $Day$ $Week$ $Month$ $Year$ $Decade$ $Century$ $Millenium$ Can you find at least one rhyming word in English Language for each of ...
4
votes
4answers
3k views

Fastest way from 10 to 1 with everyone in between

I got inspired by this question from trolley813 to make this puzzle. How fast one can get from TEN to ONE, passing each number in between? The rules are simple: You are only allowed to change ...
4
votes
1answer
133 views

Fill.in the two missing terms in this Simple Sequence

What are the two missing numbers in the sequence shown below: $$\def\S{\phantom{XX}} \large\begin{array}{|c|c|c|c|c|c|}\hline \S&\S&\S&\S&\S&\S\\[-10px] 4 & 5 & 6 & 7 &...
3
votes
1answer
128 views

What's the solution of this Raven's matrix?

I'm practicing with Raven's Matrices but I don't understand this one. What's the solution and why? Thanks!
90
votes
1answer
6k views

How can this shape perfectly cover a cube?

The following 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 this be done?
0
votes
0answers
68 views

Can this Rubik's cube be solved? [duplicate]

All sides of the Rubik's cube are solved, except the corners. And these corners need to be swapped.
1
vote
1answer
92 views

How to swap adjacent corners?

I want to swap adjacent corners of U layer, the only thing I care is: position of other 6 corners. I don't care: orientation of all corners position of all edges orientation of all edges The goal ...
4
votes
5answers
273 views

A Humourous & Simple Selfmate In One

Here's simple and humourous chess puzzle that I created after a few non-consecutive hours. I had to prove the concept feasible while making it as economic as possible. White To Move, And Selfmate In ...
2
votes
1answer
60 views

Musical Chairs Cipher: Intermediate

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
8
votes
2answers
235 views

A Device Riley Riddle

My prefix may be what a device can be on My infix is most likely in your device My suffix is what devices can be My whole is a reverse motion Hint:
-2
votes
0answers
19 views

Upside down A (for all) [migrated]

I am working on a voltmeter and the tolerance for it is 0.25% upside down A (for all) 1 digit. I am not sure what exactly what this means. I am guessing if my value was 19.95 'for all' could mean I ...
6
votes
4answers
234 views

Savage Road Signs (Part 2)

Please read part 1 or this might be confusing Since part 1, you have replaced the stolen stickers and your daughter has forgiven you. The highway ended up being a full 700km long, so you are happy ...
-4
votes
0answers
105 views

Don't even try, no need [closed]

Here is the a resume of this post: Downvotes on this post, Once you get to the end of this riddle you will get it, Am I playing with words? Nah, I'm making everyone look stupid, Some of you will be ...
3
votes
2answers
85 views

Lunatic Loves this Sunny Sequence…Find the Missing info

Complete this Sunny Sequence, Based on the information given below:
6
votes
1answer
132 views

Change EDIT to UNDO

On your computer right now, you can probably click on the "Edit" menu; and one of the first options will be "Undo". These are closely associated words. But how close are they in a word ladder? ...
2
votes
3answers
183 views

16 people, make 3 consecutive round of 4 players

I am struggling with this issue for a tournament I am planning. Take 16 people. Consider a 4-player game. To be clear, in each round all 16 players must play the game once. I want to make at least 3 ...
8
votes
1answer
653 views

I am caught when I was about to steal some candies

I am a eight years old boy, I love candies, but my mom does not want me to eat any more candies because I start to have black teeth :( but I still love candies so... Today when I was about to steal ...
17
votes
6answers
4k views

Can you open the door or die? v2

This is the follow up question to my previous question You wake up and find yourself in a very strange room with a single door. You find a note on the ground surrounded by lots of cards: ...
3
votes
2answers
108 views

Pan Digital Lucky Seven wants you to figure out all the digits

$Given$: A, B, C, D, P, Q, R, S, T are distinct digits varying from 1 to 9. AB, CD, PQ, RST are all concatenated Numbers. From the given expression , figure out all the digits to make lucky seven. ...
10
votes
5answers
4k views

Fastest way from 8 to 7

Inspired by this great question by Uvc (actually, it's the same logic but with different words). How fast one can get from EIGHT to SEVEN? The rules are the same: You are only allowed to change one ...
3
votes
3answers
214 views

What are the missing members in this sequence based on the digits 0 to 9?

Find the missing members? 0, 0, 2, 0, 2, 3, 0, ?, ?, ? Hint 1
22
votes
4answers
2k views

Savage Road Signs

There is a highway that starts in the city of Savage. You must must place distance marker signs on this highway for the outgoing traffic. According to highway code, there must be a distance marker ...
10
votes
4answers
2k views

Can you open the door or die?

You wake up and find yourself in a very strange room with a single door. You find a note on the ground surrounded by lots of cards: There are 66 green and 66 blue door cards on the ground. If you ...
0
votes
1answer
62 views

CiSRA Puzzle Hunt Backups?

I found this article describing what makes a good puzzle, and it references several puzzles which, as best as I can tell, were designed for something called the CiSRA Puzzle Hunt. However, the website ...
3
votes
1answer
75 views

Primes and Puzzles are my Passion. Combining them here to get Productive Prime Puzzles..Find the Missing Info

$EXAMPLE$: $997$ = $O.$ $T.$.- $T.$ One Thousand - Three $Expand$ on the Full Info of the following Prime clues. A). 2 = F & O. E. P B). 3 = S.P C). 5 = F. On the H. D). 7 = H. of ...
6
votes
1answer
166 views

Stars of the Celestial Bagua

Check this out: Okay, it might be more impressive if I show you what is moving along the arrows: At every vertex in a long word. Flowing in to every vertex are two short words ("inputs"). ...

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