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0answers
16 views

humans, vampires and mirrors

Here is a room composed of $10 \times 10$ squared cells. Some cells contain a double-faced mirror ( / or \ ) that reflects the light with an angle of $90°$ on both sides. The other cells can be empty (...
2
votes
2answers
61 views

Pretty lame reviews.. Why do people want this?

Browsing an online store, you see this product. The reviews are pretty low, but it seems many people want it. What is it ?
11
votes
2answers
191 views

Let's Play Tetris!

Fill the whole grid with Tetrominos. Every cell must be part of exactly one Tetromino. Tetrominos can be rotated as necessary. The colored clue cells must be part of the indicated type of ...
3
votes
2answers
61 views

Analogy with Number

The given analogy is 343 : 989 :: x : 669 What is x? 223 332 333 233
6
votes
1answer
65 views

Elementary, my dear Louis

Felt it was time for another Density™ puzzle. Warning: May require thinking. Enjoy! Final answer: (3,4,4,4)
2
votes
1answer
69 views

Find missing number

In below grid there are 2 numbers missing fill it with appropriate number . Text version: 69 10 13 192 ? 45 279 64 ? Hint :
3
votes
0answers
108 views

Mosaic by Albrecht Dürer

This is a visual puzzle (known as "mosaic" or "fill-a-pix") with the same rules as MineSweeper: The grid is to be filled with colored and white tessera. Choose whatever color you like for the colored ...
2
votes
0answers
209 views

4x4 Grid with multiple solutions

Consider the following 4x4 grid : 972 9 5 55 18 22 x 28 50 24 25 26 7 400 52 4 Find x. However, as the title suggests, there are multiple solutions. You have to ...
7
votes
2answers
305 views

Could they have avoided it?

Weird undiscovered disease slams twins equally. Did they catch it in Lyon, Turin or Barcelona? Hint Hint 2
14
votes
1answer
424 views

Phoebe's favorite insect

If Charity wants to be happy on Mondays, If Mark's thing falls into water, and if Velma eats fruits with her fingers, What would Phoebe's favorite insect be ? Hint Hint 2
2
votes
0answers
40 views

Where is Bob tweeting from?

Your friend Bob burnt out at his job, and went abroad for a long vacation1. He tweeted this today. Where is he ? 1 Note that Bob is not subject to lockdown since he is as hat.
7
votes
1answer
346 views

What do they all mean?

Middle names of two pres'dents, and one of a time traveler, A most famous sorceress, and a programmer's laughter. A call for assistance, an invisible juncture. What do they all mean? (...
4
votes
0answers
143 views

Is my colleague happy with me?

So I graduated last year with a chemical degree and I started working in a lab. I'm still pretty nervous about making mistakes, so when I had to prepare a tricky experimental setup, I wrote down what ...
12
votes
5answers
1k views
+50

Check my drawing skills!

I was never too good at drawing, but...if this is the case, there is a word associated with this bmp image. Find out which one. hint hint2 Hint3 Hint4
8
votes
3answers
61 views

How many spots do these frogs have?

You are approached by 5 spotted frogs who appear to be venomous, to avoid getting bitten by them, you must find out how many spots they have. The frogs with an even number of spots always tell the ...
0
votes
1answer
283 views

Tokyo Metro puzzle #4

Yet another Tokyo Metro puzzle based on the map! Puzzles 1, 2, and 3 are avaliable. Riddle: ...
6
votes
3answers
326 views

What is the minimum count of steps required to complete this maze correctly?

Here's a map: How to play Legend: B = Boost X = Objective (•) = ...
6
votes
1answer
144 views

That letter sequence started so nicely

Find out how the following letter-sequence is constructed: ...
-2
votes
2answers
256 views

Make the numbers 1-50 using the digits 2, 0, 2, 0

Try to make all the numbers from 1-50 using 2, 0, 2, 0 exactly once. Rules: Use only the operations +, -, *, /, !, exponents and square root No rounding eg. ...
7
votes
2answers
164 views

Number Guessing (Part 1)

I thought up two numbers with product less than $500$. I told their product to Penny, and their sum to Sandy, and told both of them the constraints and they are both perfect logicians. They have ...
4
votes
1answer
237 views

Tokyo metro puzzle #5

This is based on the first, second, third, and fourth. It will be the finale of the series. It relies on the answers to the previous four. Takebashi (solved by Nick & Brandon_J) ??? Ikebukuro (...
3
votes
0answers
170 views

Three riddles in one

Look at the conversation below Mary: Oh no! My ___________! John: _________ happened? Mary: I don't know! John: You're REACTing too much, EH? Clue 1: The answer is three words, but if ...
5
votes
3answers
279 views

The Alchemist goes missing

He hadn't been responding to emails for days. When he was deeply involved in his work, delays were not uncommon, but not this long. Something was clearly amiss. Something had happened to my long time ...
2
votes
1answer
90 views

My friend's next country

My friend gave me this puzzle. Here is the list of the places I went to, in this particular order, and their scores. United States (USA) 1890.19 Soviet Union (URS) 860.14 France (FRA) 749.02 ...
13
votes
1answer
375 views

A trip around the United States

My journey so far has taken me to the following cities in order: New York (where I started from), Baltimore, Cincinnati, Sioux City, Monroe (La.), and Columbus (Ga.). What's my next stop? Hint: ...
1
vote
1answer
127 views

How to think about permutation puzzles?

I know this is a very general question, but these kinds of puzzles are the only ones I can't figure out on my own. Rubik's cube, Twiddle, 16... (the last two are in Simon Tatham's Puzzle collection.) ...
10
votes
1answer
176 views

The entrapment of Beastly Gerbil

Part 1: The disappearance of Beastly Gerbil I've been trapped here for what feels like forever. This is all I've known. Darkness. The occasional flash of light, but then back to darkness, always, ...
23
votes
2answers
540 views

The disappearance of Beastly Gerbil

Part 2: The entrapment of Beastly Gerbil This is an unusual call in. As a private detective you have been asked to investigate several odd cases, but this you're still convinced this one is taking ...
2
votes
1answer
113 views

sequence made of <=> symbols

I tried to solve this sequence made of symbols: <=>, <=, >, <, ?, ?, => Here there's my reasoning: I thought this <=> as a full symbol and everytime the comma shifts to the ...
1
vote
1answer
52 views

k-threats Chinese Cannons Chess: Part 2

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...
7
votes
2answers
259 views

Akari: Another Light

Rules (taken from Nikoli): Place light bulbs (circles) according to the following rules. Light bulbs may be placed in any of the white squares, the number in the square shows how many light ...
9
votes
1answer
215 views

Akari: The Light

Rules (taken from Nikoli): Place light bulbs (circles) according to the following rules. Light bulbs may be placed in any of the white squares, the number in the square shows how many light ...
3
votes
1answer
106 views

My whole ceases to be anything

My prefix isn’t affirmative My infix is somewhat a ring My postfix isn’t a prime My whole ceases to be anything
3
votes
1answer
105 views

Math Puzzle: Totaling up A,B, C [closed]

We know the following about the numbers $a$, $b$ and $c$: $$(a+b)^2=9,\quad(b+c)^2=25, \quad(a+c)^2=81$$ If $a + b + c ≥ 1$, determine the number of possible values for $a + b + c$
4
votes
3answers
177 views

4-coloured queens attacking every opponent queen once

Can you place 6 queens from four different colours (24 in total), such that each queen attacks exactly one queen of each colour? They may attack as many queens of their own colour as these are ignored....
9
votes
3answers
442 views

Pieces of paper without consecutivity condition

TL;DR: like this puzzle but with an arbitrary number of papers and without the condition that the papers chosen must be consecutive. You are given $n$ pieces of paper, and you write down $n$ distinct ...
4
votes
1answer
57 views

k-threats Chinese Cannons Chess: Part 1

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...
2
votes
0answers
77 views

Why did she choose O6G?

He gave her 8 choices. 7 lead to death, one lets her continue. O6A O6B I6C U6D I6E I6F O6G O6H Of course, he knew she had no idea. He turned the hour glass and gave her 5 items from his suitcase....
10
votes
2answers
855 views

Mensa Norway Question Help Please

Anyone can please help with this question? Currently stuck here. Source: Mensa Norway
2
votes
0answers
126 views

Encrypted growing sequence

The following sequence has been encrypted: 1-0 3-0 6-1 ...
10
votes
2answers
345 views

A puzzle made special for today

Can you find the message hidden within this grid of puzzles?
4
votes
2answers
190 views

Where is this weird island?

Do you know me or do you know where exactly I am? I am an island in the atlantic ocean. Every day, people appear and disappear on me. I am invisible to humans but machines can recognize ...
13
votes
1answer
373 views

What city am I supposed to be travelling to next?

I'm currently on a trip around the United States (for pleasure) and am a little lost. I had it all planned out but lost my itinerary somewhere along the way. Thought maybe you could help. I started ...
0
votes
1answer
132 views

alphanumerical sequence,or symbols sequence

I've been challenged to solve this sequence, but I can not figure out the answer. I originally thought it was prime decomposition like: $96=2^5*3$ $12=2^2 *3$ $169=13^2$ But that reasoning only ...
6
votes
1answer
210 views

A descriptive cake

A 'geezer' walks into a bakery. The man is covered from top to bottom with tattoos - on his face, on his shoulders... even arrow tattoos on his fingers. He has dropped by to hand in a design for a ...
14
votes
1answer
434 views
+50

Shots, shots, shots, shots!

Once in a while I go out for a drink to my favourite bar. Normally is just drink a beer, eat some snacks and have a good time with my three friends. But last night I wanted to do some shots. The ...
1
vote
0answers
92 views

Complete the following analogical analogy

In an analogy ":" means "is to" and "::" means "as/like". Now, since this is almost an analogy (maybe a future type), I will accept the solution if it's almost correct. Kinberg : ‴niɘɈƨnɘƨiƎ‴  :: ?
15
votes
1answer
355 views

What is a Substantial 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 Substantial Word™. Use ...
5
votes
1answer
341 views

An extremely fair die

I have in mind a special kind of die, one that is even more fair than uniform density dice. If the die has $n$ faces with labels going from $1$ through $n$, then some faces will be larger than others ...
6
votes
1answer
113 views

Technology island

Here is a very easy riddle for you: I am a piece of land but I am also technology. I am drowning and many people think that my time is over. But still, many people build on me. Some people ...

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