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1answer
99 views

The New Mega-Splitter™: What's Next?

Here we have the great pyramid. The brand new 50-50, Out-to-In Mega-Splitter™. Fill in the question marks with the next numbers! All the hints you should need are in the question!
4
votes
1answer
79 views

Combinations on superimposed latin squares

Let's have two latin squares. When we superimpose them we obtain a 6x6 superimposed square as shown in the diagram. By visual inspection we see this contains 15 combinations and their repetitions ...
6
votes
1answer
175 views

7-QWERTY-distance words

My previous puzzle The QWERTY-shortest word was solved nearly instantly by the effective puzzling community. I also believe it is because the main parameter of the puzzle 4.7 was not perferectly set. ...
11
votes
1answer
372 views

What do “(מ)” and “(ש)” mean in an Israeli cryptic?

I was looking at the Hebrew cryptic crosswords in a recent copy of the Israel newspaper ידיעות אחרונות, and I noticed that some of the clues had "(מ)" or "(ש)" — or sometimes both —...
4
votes
2answers
456 views

Paying bills in Alphagonia

In the Kingdom of Alphagonia, where the national currency is the Alpha, banknotes are available in all whole-number denominations of alphas: 1, 2, 3,... a) What is the least number of such notes a ...
12
votes
0answers
169 views

The Case of the Poisoned Poet

I was in my office, trying to officiate a disagreement between Misters Jack Daniels and Jim Beam, when the dame walked in. She wore a slinky dress and glasses so dark all I could see in them was the ...
3
votes
1answer
191 views

Lasers: Cross through the bridges (Level 3)

Previous Level:- Lasers: The Reflection (Level 2) Rules : There will be lasers which are shaped like an arrow. The arrows pointing in the respective direction shows where the laser goes and the ...
11
votes
1answer
380 views

Please Don't Flag This Question

An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls Today, I received a rather peculiar mail from L.B.G. (Low-Budget Gladys), Glady's cousin, thrice removed (and aunt to the ...
2
votes
2answers
190 views

Let's Play! - a Scandi Drama

This is an original question. Russ and Kess are chatting. Russ says he saw Kess cracking away on his computer and wondered "what is the significance of 23986?". Kess said "it might make ...
2
votes
2answers
126 views

Save the poor Gingerbreadmen!

The poor gingerbread men want to survive to Xmas (they don't mind being eaten afterwards). If at least one of them doesn't guess his hat correctly, they will all be cruelly eaten before Xmas. This is ...
4
votes
0answers
254 views

Parallel Trees On The Grass

Let the picture speak for itself and try to find the correct height of the tree marked with "?". Hint Hint2 Strong hint
6
votes
1answer
248 views

How to solve this Loopy puzzle efficiently with little backtracking?

I would like to solve this Loopy (Cairo) puzzle: But I would like to do so with as little backtracking as possible. By this I mean that I want to have at most one pending guess at a time; I do not ...
1
vote
1answer
64 views

Find the missing number (HackerRank general cognitive test question)

HackerRank general cognitive test has the following question that I cannot solve: Please find the missing number: 6 8 6 2 4 2 9 7 8 9 9 8 ? 1 3 Can you help me ...
12
votes
1answer
283 views

Sergeant Sequence calls for back-up

An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls "Sequence, get in here! Your man's definitely up to something!" The mood at Headquarters was tense. Sergeant Sequence ...
3
votes
1answer
216 views

Lasers: The Reflection (Level 2)

Previous Level:- Lasers : Introduction (Level $1$) So here is my lasers level 2 continued, and I have something new, mirrors! Rules: There will be lasers which are shaped like an arrow. The arrows ...
2
votes
1answer
142 views

What the guiding guide guide

Here's a riddle I created for Puzzling: Two guardians for a guideRadiant ladies on her side.Oh back, the first preside;Herb pac the second replied.Both have notorious great pride,For id luny was cast ...
1
vote
1answer
191 views

Lasers : Introduction (Level $1$)

Lasers is a new type of puzzle I created. (Taken help from this example, The Lazy Laser Physicist: Part 2) There will more ideas to come too, and they will be a bit simple yet different. Rules : ...
0
votes
2answers
264 views

How many triangles can you obtain using the 6 vertices and center of a regular hexagon?

Let's say there is a regular hexagon with center at point O. Question 1. How many triangles can you obtain using the 6 vertices and its center? Question 2. What is the largest number of different ...
1
vote
1answer
94 views

How do you find the sum of the digits contiguous to one which is situated in a three by three table?

The problem is as follows: I am placing the numbers from 1 to 9 in the squares of a 3 x 3 board. I start by placing the numbers 1, 2, 3 and 4 as shown in the figure. For the number 5, the sum of the ...
2
votes
1answer
115 views

Which step is creaky?

The problem is as follows: Ms. Flor has a 50-step wooden staircase that allows access from the first floor to the second floor. One of the steps creaks when a person stands on it. Diego and Mike are ...
11
votes
1answer
299 views

Tetromino Nurikabe: Five Fours

I enjoy combining polyominos with grid-deductions. My current plan is to create a Pentomino Nurikabe. But that sounds hard, so I made this Tetromino Nurikabe as practice first. I think it came out ...
3
votes
1answer
166 views

Variation of 100 Prisoners' names in boxes

100 Prisoners' Names in Boxes The following puzzle is a variation of the above puzzle. Names in Boxes The names of 4 prisoners are placed in 4 wooden boxes , one name to a box, and the boxes are ...
1
vote
2answers
130 views

Teachers around a circular table - who teaches geometry?

The puzzle is as follows: In a teacher's lounge there is a circular table where the teachers eat their meals during lunch time. The teachers' names are Albert, Benny, Charles, David, Henry and Felix, ...
9
votes
2answers
345 views

Maximize my flags

You are given the next list of 48 flags. For each pair of flags that are side by side, you score 1 point per color they share as a frontier. For instance France and Finland score 1 point thanks to ...
2
votes
1answer
183 views

Puzzle regarding emptying of cup!

Initially, I have $3$ cups with infinite capacity and some prefilled amount of water(positive integers). I can do only one operation repeatedly by choosing any $2$ out of $3$. The operation is that if ...
4
votes
1answer
122 views

Constant puzzle

A constant is hiding behind this puzzle, can you tell which? 4 $\rightarrow$ 2 $\rightarrow$ 1 $\rightarrow$ 1 $\rightarrow$ 1 $\rightarrow$ $\dots$ ? $\rightarrow$ ? $\rightarrow$ ? $\rightarrow$ $\...
-3
votes
2answers
81 views

Psychology Today Culture Fair IQ test question - dot moving within a star

I took an IQ test at Psychology Today(https://www.psychologytoday.com/intl/tests/iq/culture-fair-iq-test) and encountered this question which I wasn't able to solve: I could not find a pattern in how ...
9
votes
1answer
297 views

It's your turn now!

What is the simple rule behind these three relations below? $F$ $\rightarrow$ $C$ :: $R$ $\rightarrow$ $I$ $\rightarrow$ $\sqrt{F}$ :: $IA$ $\rightarrow$ $D$
26
votes
1answer
2k views

Yes, this is the legendary wall

An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls This is it. This is the very wall. His life, his work — this wall was the center of it all. One simply cannot imagine his fame, ...
1
vote
2answers
63 views

Mensa online IQ test question - visual analogy with squares and circles

I took a Mensa online IQ test(https://www.mensa.lu/en/mensa/online-iq-test/online-iq-test.html) and encountered this question which I wasn't able to do: This question is basically a visual analogy, ...
1
vote
2answers
171 views

Travelling out of the country

Where did Kate go? Below is a fictitious conversation: ...
0
votes
0answers
61 views

Mastermind Swaszek Strategy [duplicate]

I'm writing a paper for school at the moment (12 grade) and I came across the name Swaszek. His strategy is often referred to as being solvable without any computers. I have read a couple of articles ...
-2
votes
1answer
165 views

test-guide.com Free IQ test question - circles above and below a line

I took an online IQ test(https://www.test-guide.com/iq/free-iq-tests/free-iq-test.html) and encountered a question that I wasn't able to solve: I did not find a pattern that produces the third image. ...
4
votes
2answers
480 views

The wrapping machines of Santa

Christmas is coming and Santa is working hard to wrap all the presents until the 24th of December. He has six wrapping machines: A, B, C, D, E and F, that work $24/7$ all at the same time. But the ...
7
votes
4answers
760 views

The questions of the history quiz

Here's an old puzzle I found on an 80's magazine. I slightly adapted it for Puzzling: Four students, Anne, John, Philip and Daisy made an history test and gave the next four answers each to four ...
1
vote
1answer
224 views

The Guild's Puzzle

A mighty warrior by the name of Stiv the Slayer has done enough by brawn to prove himself worthy of entering the Guild of 24/7rs. Now what is left is that he needs to prove that his brains are also up ...
3
votes
1answer
310 views

Where does my friend live? 6

Other questions in this series can be found here. My friend, a poet, sent me a poem: I live in a country, There are bridges and rivers and boats, on the axis. There was fighting over a roulette, ...
1
vote
1answer
57 views

Add operators to make the equation correct, and give 3 ways to do so

I'm trying to solve this puzzle: Add operators to make the following equation correct: $4$ $4$ $4$ $4$ $=2$. Give 3 ways to do so. You are allowed to use brackets if necessary, but no rearranging of ...
23
votes
2answers
4k views

2020 election: The results are in!

At the Puzzling Stack Exchange headquarters, we've received the first definitive knowledge of the results of the United States presidential election of 2020. And because this is Puzzling, we naturally ...
1
vote
1answer
70 views

Add operators to make the equation correct [duplicate]

I am trying to solve this puzzle: Add operators(and brackets if necessary) to make the following equation correct: $3$ $3$ $7$ $7$ $=24$. You may also rearrange the numbers if necessary. Despite ...
2
votes
2answers
125 views

Presidential Election

This puzzle was inspired by the current 2020 US presidential election. You are running for president in a country with 10 states. To win a state you must conduct more rallies than your opponent. ...
3
votes
1answer
77 views

How many different ways can you color the diagram?

This question is a continuation of this one. Here are nine squares, connected by lines. Each square must be colored, and two squares connected by a line must be colored differently. Question 1. What ...
9
votes
1answer
440 views

History is written by the Connect Wall

This is an entry for Fortnightly Topic Challenge #42: Wordless Connecting Walls. Election Day in the United States, and my daughter is taking Civics, so we're watching the returns. It occurred to me ...
12
votes
1answer
552 views

Solve this algebraic equation

Wait what? Is there any equation?
11
votes
2answers
551 views

Chain Puzzle: Tabletop Games #7 - Maze

This is the seventh Chain Puzzle in the Tabletop Games series, in which all puzzles are themed around board games, card games, tile games, and the like. The answer to this puzzle is a thematic word or ...
3
votes
1answer
175 views

Fewest number of weighings to check if coins are correctly labelled

This is inspired by the following question over at Computer Science Stack Exchange: Information-theoretic limits for a weighing puzzle You are given 11 coins with labels 1, 2, 3, ... up to 11. You ...
11
votes
1answer
845 views

Fight for your life!

Try figure out what the answer is by looking at the image below. The answer is nine letters long.
3
votes
1answer
182 views

What is so unique about these four numbers?

These four numbers look like four ordinary numbers. But I found something unique about these four that I may be only true for one other set of numbers-- unless you raise the bar-may be. So what is ...
17
votes
1answer
378 views

Connect Wall - Grid Puzzles Edition!

This is an entry for Fortnightly Topic Challenge #42: Wordless Connecting Walls. Huge thanks to bobble and Deusovi for playtesting! >< And hey, this one may also mark my 100-day puzzle here in ...
8
votes
2answers
167 views

Bridges of Carcass County

This is a Carcass Walking puzzle. The objective is to place the given cities into the grid, connect them with roads, draw one river across the grid, and find places for the given number of cloisters. ...

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