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3
votes
1answer
230 views

Puzzle Society Headquarters

You finally did it! You've been accepted into the elite Puzzling Society. All that is left to do is to go to headquarters and attend your first meeting. You received your invitation letter in the mail,...
26
votes
3answers
3k views

How many fingers do the inhabitants of this planet have?

Actual Puzzle After crash-landing your spaceship on an uncharted planet, you run across the following drawing: $\begin{matrix} ⊙ & × & × & ⊓ & ⊓ & ⊙ & & \\ ⊙ & ∿ &...
2
votes
2answers
232 views

Gambling game where you pick how many coins to flip

At a gambling joint, you are invited to be a player in a game with identical unfair but consistent coins flipped simultaneously in each round, with no cost to enter. Each player gets a different ...
2
votes
1answer
223 views

Prove the existence of a triangle such that all of its sides are of the same color [closed]

Seventeen points have been picked in a plane, and each pair of points has been connected by a line segment of one of three colors: red, yellow, or green. Prove that there are three points which are ...
2
votes
1answer
135 views

Five 3:1 rectangles tiling a square

Can you fully tile a square with 5 rectangles such that: Every rectangle has 3:1 ratio, ie., their length is triple their width. No part of any rectangle is outside the square. No two rectangles ...
2
votes
1answer
350 views

Although it's commonly known as _ _ _ _ _ _ _ _ _ , it's also called

The answer consist of two words.
1
vote
4answers
482 views

A big kid plays with other kids while everyone else is guessing about a kid. No I'm not kidding at all!

A little while ago my friends had an elaborate baby shower to celebrate my friend's first pregnancy. I admit that I'm a giant man-child who loves playing with kids more then pretending to be an adult ...
6
votes
1answer
298 views

Find the secret in this image

Try to find the secret hidden inside this image. Discovering one part of the secret may lead you to the starting point of another part. And so on. It may look like an endless loop ...   ... or is it? ...
1
vote
1answer
120 views

What is next in the sequence of dot arrangements?

Given the 3 arrangements, identify the next in sequence. Reference: Book on Quantitative Ability and Puzzles for Competitive Exams, India. I have the correct answer, will edit the question once it ...
2
votes
2answers
175 views

Quickest chess stalemate with Queens exchange

Continuing my previous puzzle. If both players cooperate, what is the quickest stalemate in chess that includes a Queens exchange, in a legal game?
3
votes
2answers
214 views

Quickest mate with Queens exchange

If both players cooperate, what is the quickest mate in chess that includes a Queens exchange, in a legal game?
1
vote
1answer
124 views

29 Scoring Nations

The following 29 nations, starting 2022, have scored. Can you explain? United Kingdom 719 Germany 415 France 308 Brazil 293 Finland 245 Italy 207 Australia 130 USA 129 Austria 118 Spain 106 ...
0
votes
1answer
88 views

Is X-Sudoku easier to solve than classic Sudoku [closed]

X-Sudoku has extra rule for diagonals which give extra hints for diagonal cells. Does this implies that solving X-Sudoku puzzles are easier than classic Sudoku puzzles?
4
votes
2answers
315 views

Seven 2:1 rectangles covering a square

Can you fully cover a square with 7 rectangles such that: Every rectangle has 2:1 ratio, ie., length double its width. No part of any rectangle is outside the square. No two rectangles overlap. Note ...
-2
votes
0answers
142 views

9x9 grid containing the most words

Let's have a 9x9 grid. In the top row you can put any nine letter word. By permutating the letters of that word, fill the entire grid. The same letter should not appear more than once in any row or ...
22
votes
1answer
1k views

What is this puzzle?

$$\huge\text{This puzzle is _______}$$
-2
votes
0answers
133 views

Stuck at decrypting a cipher after decrypting a part of it

If you go to https://www.azuki.com/mindmap at 5 (bridge between) behind "redacted" you will find some blurred text. Checking the page with inspect element you will find 3 paragraphs, out of ...
-5
votes
3answers
127 views

What is the Result of this icon Equation? [closed]

from:https://www.rondogo.sk/hra I have problem with heart :) A) 19 B) 20 C) 21 D) 22
-2
votes
2answers
109 views

What is the right number to replace and why?

Can anyone help me solve these puzzles? Puzzle from: www.treningmozga.com
4
votes
3answers
869 views

Finding a Kakuro trick

The following screenshot is taken from the Android app Kakuro++ (level 9 riddle 12) And I verified the current status within the app. I managed to solve the puzzle by guessing a 50/50-number and ...
0
votes
0answers
147 views

My wish that I can't see

There's fire outside. The world is collapsing, it's over. It's not going to be just fine; it's never going to be. I sing nothing. This is not of mine. $\sin\theta \sec\theta$ is all I have, even ...
3
votes
1answer
310 views

SECRET PUZZLER EYES ONLY

Today is my 40th birthday and I will be celebrating by sharing a puzzle with you all. I recently stumbled upon an abstruse image, and apparently the words in main body of the image all have something ...
4
votes
3answers
439 views

Number merging game

You are given a grid filled with numbers. If a number $n$ is orthogonally adjacent (horizontally or vertically) to another number $n$ then you can pick it up and place it on top of the second number. ...
-1
votes
0answers
166 views

Need help with an ARG puzzle

I am attempting to solve a puzzle on angusnicneven.com It contains entering things into the url to move forward https://angusnicneven.com/Terminal_230_psst I found a series of numbers on this page ...
0
votes
0answers
82 views

Find a key in a matrix of numbers

I have following matrix and I need to find a key from that. The key should probably consist of 1-8 lowercase letters or digits. I have basically no hints how to find the solution or what exactly the ...
4
votes
0answers
180 views

By what rules are they changing the switch?

First of all, I don't know the answer to this question; I have some ideas, but nothing rigorous. Apologies if it's not on-topic. I have solved the puzzle now. Suppose there is a light switch in a room....
12
votes
6answers
3k views

What's the optimal strategy for Wordle?

Wordle is a game by Josh Wardle in which you try to guess a 5-letter word in at most six attempts. After each guess, the letters which are not in the word are highlighted in grey, the letters which ...
10
votes
2answers
304 views

Yet I am lovable

Transpose neighboring letters until the word LOVABLE is formed in the outermost petal of this rosette: The rosette above consists of 13 petals, each containing a word. The words spiral outward from ...
3
votes
1answer
245 views

The two numbers which were overestimated

James: These two cards have two numbers $X$ and $Y$, which are both one-digit numbers and are different. Can you find the sum? Jack: No, that's impossible. Can I get a hint? James: The last digit of $...
2
votes
1answer
251 views

What number is missing in the pentagon? [closed]

What number is missing in the pentagon? Puzzle from: https://www.rondogo.sk/hra/
8
votes
1answer
359 views

Help! I need somebody

A friend sent me the following puzzle and claimed that with a bit of general knowledge (or compensatory research skills) and creative thinking I could arrive to the answer. Alas, the puzzle exceeds my ...
1
vote
1answer
65 views

Maze: Emoji Portals 3: Konchog's RE-Revenge

This puzzle is now revised, fixed, checked, and double-checked. It is also the last (certainly for the time being) of this class of emoji-portal 'classic' mazes. Portals are always in adjacent levels ...
4
votes
1answer
478 views

Christmas letter?

On Christmas,I received a letter, looking at the sender, I found nothing, except an 'anonymous'. I didn't understand why, but as I kept reading, it finally dawned to me that this is a puzzle, and here ...
0
votes
1answer
67 views

Maze: Emoji Portals 2: Konchog's revenge

Your Mission: get from START to EXIT. There is only one route. All portals, cells, and corridors are visited maximum once.
2
votes
1answer
115 views

Maze: Emoji Portals

This is a more classic style of maze that I've been working on. Each emoji is twinned on the subsequent level, and appears in the same co-ordinate on that level. Your Mission: get from START to EXIT. ...
5
votes
1answer
168 views

Fill in the blanks with numbers

A simpler version of this puzzle was by @Sid on PSE Fill in the blanks with the number in words Here is a bit challenging version Fill in the blanks with numbers (in words) for the following: This ...
6
votes
1answer
241 views

Seasonal and visual

I'm new here, but I guess this is terribly easy. One clue: Further indication, removing the "enigmatic" nature of puzzle:
7
votes
1answer
212 views

Finding the weights of 3 coins

I have 9 coins; 3 coins each of 3 denominations. Coins of the same denomination all weigh the same. Each coin weighs an exact whole number of grams, and at most 9 grams. I can weigh any subset of my ...
24
votes
1answer
2k views

Did you witness the Event?

Always seeking to arouse curiosity in his grandson, Grandpa has another challenge for him: Grandpa: Say, Billy, have you heard of the Event? Billy: What event Grandpa? Grandpa: Well, the Event comes ...
4
votes
1answer
141 views

Said to be made in China

I'm looking for two words. In this order: Y B R |-2 -13 +2|+3 -12 -2 -1|+7 -8 +4 +0|
-2
votes
1answer
141 views

What's a Tricky Word™?

If a word conforms to a certain rule, I call it a Tricky Word™. Use the examples below to find the rule. Tricky Words Not Tricky Words RHYTHM ELEPHANT GIRL BOOK GYM STUFFED STRENGTH WEAKNESS ...
1
vote
0answers
165 views

Visual puzzle with unfolded cubes, hatched lines [closed]

A friend of my provided me the following puzzle, asking for help to solve it/ We don't have any additional input information except the picture. Answers should give a logical explanation.
9
votes
4answers
861 views

Splitting integers and taking differences, how can the sum be constant?

Start with the set of integers from $1$ up to $2n$, where $n$ is a natural number. Split this set into two disjoint subsets of equal size, say $\{a_1<a_2<\cdots<a_n\}$ and $\{b_1>b_2>\...
2
votes
1answer
237 views

Thirteen Diagonals of a Nonagon

A regular nonagon has 27 diagonals, and these diagonals intersect in the interior of the nonagon at 126 distinct points. Show that it is possible to select 13 diagonals of a regular nonagon such that ...
3
votes
1answer
79 views

Maze: Pentagonal Florets

Start at C, and visit all the letters! No road is travelled twice, but some nodes might be (though, none which are labelled). Special prizes for low score routes! This is going for fun rather than ...
12
votes
1answer
329 views

Estimating Time

Here is a descending sequence of seven puzzles sorted from large to small. If you work on one a day, you should finish within a week. So let’s say two weeks to be safe. The sequence is also ascending ...
6
votes
1answer
183 views

Our Common Bond

Puzzles are fun But we share a ton Between and beyond Our common bond. Concise, memorable, and usually philosophical aphorism "You know, sometimes I _____ even myself" Mongolian yurt Cured ...
8
votes
1answer
316 views

Probability that D wins this contest

Problem: $A, B, C, D$ are playing an archery game. They have equal probability of landing their arrow on any spot the target with radius of $R$. Their score is the distance to the center of the target....
10
votes
1answer
209 views

Snowcaps - A grid deduction puzzle

This winter-themed puzzle is basically an upside-down Aquarium, the idea being that instead of fish tanks being filled with water, the areas are mountains being covered with snow. The goal is to shade ...
6
votes
0answers
165 views

Swarms of Codes

Since the days of old, codes have been devised and utilized to various ends: to relay secret messages, to identify friend from foe, or to record secret formulae. What ancient dark art is at work here? ...

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