# All Questions

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2k views

### Stuck on a puzzle

I have been working on a Knapp Daneben Tapa, where each clue is wrong by exactly one unit. I have tried it a few times and keep running into the same problem. I think I am solving it deductively/not ...
374 views

### What do Abraham and Levi each like?

Abraham and Levi are two friends who like many of the same things, but sometimes their preferences can diverge. Given the examples below, determine what governs their curious differences of opinion. ...
153 views

### Heyacrazy: Dissection

This is a Heyacrazy puzzle. Rules of Heyacrazy: Shade some cells of the grid. Shaded cells cannot be orthogonally adjacent; unshaded cells must be orthogonally connected. When the puzzle is ...
387 views

### What is the best way to solve this 6x6 sudoku? [closed]

I eventually used a trial and error method to solve it: Assume B1 = 2 C2 and F1 = 4 C3 = 2 F3 = 6 There are no candidates left for A3 This let me set B1 = 4 and hence solve the puzzle. But is there ...
209 views

### Riddle on the rocks

My beginning is slang for a dollar. My middle can describe beer. My end is circular. What am I?
829 views

### 3D cryptic featuring Mao, Stalin and Simba's uncle

This is a three-dimensional cryptic crossword. The eleven squares above represent the layers of a $11\times11\times11$ cube. Across 21. Tribunal's way to imprison you in the old days (10) 25. ...
259 views

### Is this robot-programming puzzle solvable?

I have gotten into solving this kind of puzzle recently. I've found this one and after an hour of trying, I don't seem to be able to find a solution. I'm starting to think there might be an error and ...
215 views

### What do Teignmouth, Paris, Ulm, Auxerre, Brunswick, Beaumont-en-Auge, and Ryazan have in common?

In the book Real World Haskell, there's a non-programming-related puzzle in a footnote at the bottom of page 15, in the middle of a simple text-processing problem: ... Find or create a text ...
162 views

### Witches' Coffee [closed]

Two witches make a nightly visit to an all-night coffee shop. Each arrives at a random time between 0:00 and 1:00. Each one of them stays for exactly 30 minutes. On any one given night, what is the ...
232 views

### What is a Bedspread Word™?

In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Bedspread Word™. Use the following ...
305 views

### Light Themed Cryptic

This crossword is themed, and in fact, the theme is revealed in the unclued answer. Note that some of the clues won't make a lot of sense without knowledge of this theme, as I couldn't find much in ...
256 views

### What is a Valid Word™?

This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Valid Word™. Use the ...
6k views

### Half filled water bottle

If you are given a marker and a transparent water bottle partially filled with water, can you tell if the bottle is half filled or not?
547 views

### A Magic Flying Saucer

Place 19 different positive integers on the vertices of this graph so that the 13 products of three numbers in a straight line are all equal. Do so in such a way that the product is as small as ...
388 views

### Heyacrazy: Empty Space

This is a Heyacrazy puzzle. Rules of Heyacrazy: Shade some cells of the grid. Shaded cells cannot be orthogonally adjacent; unshaded cells must be orthogonally connected. When the puzzle is ...
145 views

### Don't Fail MY Exam [duplicate]

A professor decides the following grading scheme in his class. After the final exam is graded, he keeps all the papers upside down on his table in a random order so that no student can recognise his ...
82 views

### Tales of Two Cities (With no Gas Stations in between) [duplicate]

Two cities A and B are 100 miles apart. A person has to travel from one city to the other in his old old car, which can travel only 50 miles with its tank full. Unfortunately, there are no gas ...
259 views

### The Wires Underground [duplicate]

There are ten wires that run underground across a river. Thus on each of the banks, there are ten ends of the wires. Unfortunately, given an end of a wire on this bank, one doesn't know which end on ...
430 views

### Mensa question need help

I've tried to solve this question(Exercise 31) in many ways but I couldn't figure out the logic behind this. $\Space{100pt}{0px}{0px}$
700 views

### How could an angel have written an essay about today's weather that's perfect, but they also could've done better? [closed]

Here is a short puzzle story that I created. People on other forums seem to not understand it for some reason, but everyone I spoke to in real life understood it. But no one I knew so far got it right ...
139 views

### Around The World

It's White to move and checkmate Black in 36 moves. I have slightly changed the original stipulation. Feel free to explain the title if you want to! Source(Couldn't copy and paste!): (Oleg Pervakov ...
73 views

### The SS Wordsquare

Anchor's away! Ahoy, puzzlers, I am Cpt. Wesley Wordsquare. I'm about to set sail for the mainland to see a show at my brother Winslow’s Wordsquare Theatre, however I can't seem to decipher this ...
217 views

### Heyacrazy: No Diagonals

This is a Heyacrazy puzzle. Rules of Heyacrazy: Shade some cells of the grid. Shaded cells cannot be orthogonally adjacent; unshaded cells must be orthogonally connected. When the puzzle is ...
119 views

### Distribution of Work

The Leadman was instructed that on each floor level of the building under construction, there shall be two workers assigned to do some job. There are seven workers on the ground floor and five workers ...
110 views

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350 views

### Change my first, I'm entertaining

Change my first, I'm entertaining Change my first, I can kill Change my middle, I'll be over Change my middle, I'm some bloke Change my last, I'm made of skin Change my last, ...
170 views

### Find pattern for new equation in number sequence

I saw this puzzle on this address. $3+5+7=152181$ $4+5+6=202461$ $3+4+7=122172$ $9+4+5=364518$ $8+6+8=?$ I know that first $4$ digits are $4864$. How could I find last $2$ ...
398 views

### What is a Motley Word™?

In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Motley Word™. Use the following ...
48 views

### lightest ball among 8 balls by 2 tries using a balance scales [duplicate]

I have 8 balls and one of them is lighter than others. How could I find that ball by 2 tries? Also I have a balance scales.
102 views

### 12 balls 1 scale with 4 groups

So, we all know the famous 12 balls 1 scale riddle. It has been here repeated many times, however, the provided solutions always start with splitting the twelve balls into three groups of four. This ...
167 views

### Make $2471$ out of first seven powers of two

Can you make $2471$ using first seven powers of two: $1,2,4,8,16,32,64$, each exactly once? Only the basic operations are allowed: $+,-,\times,\div$, and parentheses $(\space)$. ...
141 views

### Sleeping Beauty Study at the Institute of Mad Science [closed]

You've been approached to assist in the furtherance of SCIENCE as a research subject at the Institute of Mad Science (local branch)! The experiment you'll be involved with is called the Sleeping ...
192 views

### Heyacrazy: Careening

This is a Heyacrazy puzzle, designed at request of testsolvers of previous puzzles who wanted to see how longer diagonals would work. Rules of Heyacrazy: Shade some cells of the grid. Shaded ...
87 views

### Alphametic puzzle, involving square and prime numbers [closed]

I have been trying puzzle solving recently and came across this problem. Any hints on how to do this? So far, I have found that N, R and F must be odd (as they are the last digit in a 5 digit prime ...
175 views

### Bravetart: Iconic America

It's been a while since I've posted, and in the spirit of my recent works, I've got a simple riddle to get back into the swing of things. As always, I hope you enjoy it, and best of luck! After the ...
120 views

### How many cubes is this tringle made of? [closed]

can you guess? i know its a simple puzzle but lest just have fun
706 views

### What is a CirKle Word™?

This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a CirKle Word™. Use the ...
154 views

### Trying to figure a math puzzle/equation for a surprise trip using the date [closed]

I planning a surprise trip for my husband's 40th. He is a math geek. I am not. My plan is to tell him in a series of riddles/puzzles that he needs to figure out. We are going to LA to see his ...
587 views

This puzzle is a combination between a Slitherlink and a Fillomino. You should put a number in each square and draw a single closed loop over the grid such that the following properties are satisfied:...
714 views

### Cultural before-and-afters

Each answer to a clue will consist of the titles of two works or series put together, where the last word of the first title matches the first word of the second title. Note that the word match does ...
371 views

### So, what's to do?

It's White to move and draw the game. What must White do? You must provide proof for your claim of what's to be done by any reasonable means. This puzzle was created by Nikita M. Plaksin, and ...
4k views

Inspired by A double-agent with a conundrum. Everything is hypothetical and while the choice of countries is important, they serve no political purpose. Tension between the US and China is rising. ...
182 views

### What are the house numbers?

Following the last question " What is the corner house number?" here is possibly a more challenging version. Fill in the missing house numbers on the map shown below. The area is occupied by math and ...
427 views

### 'The Imperial triangles' trigonometry question

There is a very well-known family of right triangles in Mathematics called "The Imperial triangles". Let me explain you how they are defined: We say $T_n$ is the $n$-th Imperial triangle if these two ...
225 views

### A Strange Safari

Well, my friend told me that he's just visited a safari. Being toured around, he was very surprised how the guide could spot those animals so quickly. He took some pictures of the animals, ...
957 views

### Earth rotation discrepancy

Some time ago, I discovered that planet earth's sidereal rotation period equals 23 hours, 56 minutes, and 4.1 seconds (see for example this Wikipedia article). The sidereal rotation is the rotation of ...
4k views

### Sun setting in East! [closed]

It was a bright and sunny day during April- May(can say, peak of summer) in a country in the northern hemisphere, near to the equator. I was wandering(on foot) through this country's vast and open ...
602 views

### A journey through letters and numbers

In the year 2407476658354979366708415043923125501315337890943021769230219230892355006879909214795402102204224, as cosmopolitanism is in the air and companies are more than ever bound to ...