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18
votes
1answer
747 views

My botched ordering task

I've messed up once again. I was supposed to put this group of words in order... Even though I'm sure I've alphabetized them correctly, I've been told that my solution is completely wrong! I can't ...
2
votes
4answers
159 views

How to solve this Number Grid?

I have a maths puzzle from a book. It is labelled computation and logic but I cannot make any progress. The book lists the answer and it is valid but I cannot see how the answer can be found. ...
8
votes
2answers
289 views

Practical Chemo Opus

Herb Clark likes few substances, such as: CARBON, NEON, SILICON, PHOSPHORUS, IRON, COPPER, ARSENIC, KRYPTON, ... Find others per inclination.
4
votes
3answers
787 views
+50

4k reputation special: “I hate square numbers!”

There is a large prison, with exactly 4000 prisoners. The warden noticed that there were too many prisoners, so they lined up all the prisoners, and repeated the following procedure until less than ...
20
votes
1answer
219 views

George Orwell Sudoku

Here is a puzzle I created today. The title is "George Orwell Sudoku" Normal Sudoku rules apply. In every coloured group of three cells the middle digit must equal the sum of the other two ...
6
votes
1answer
160 views

An Enigmatic Game

I have a fun-ky puzzle for everyone today. Here is the position. FEN-rnbq1rkb/ppp1pp2/5p2/8/8/4K3/PPPPNP1P/RNBQ1R2 It can be reached in one way in exactly 9.5 moves, or 10 White and 9 Black moves. ...
21
votes
1answer
271 views

Sergeant Sequence takes the case

It was 2am and Sergeant Sequence had been called in to Headquarters urgently. The second he stepped through the door a file was pressed into his hands by the Chief Investigator, who began to talk ...
10
votes
1answer
410 views

A classical sequence

What should fill the blank to complete the sequence? G G G _ F F F D From Brain Games: Lower Your Brain Age in Minutes a Day (Brain Games Series Collection #3)
24
votes
2answers
480 views

A Minesweeper Sudoku

My brother created this puzzle, and he wanted me to post this here. Each 3x3 box contains three mines (those squares also have numbers in them). There are no mines in boxes containing a 1, 2, or 3. ...
7
votes
1answer
233 views

Cryptic Family Reunion: Ch-ch-ch-ch-changes

The answer to this puzzle is a list of ten thematically related words or proper names or phrases. Each of these is clued cryptically, and the theme is to be determined. Since the definition part of a ...
-3
votes
1answer
148 views

Weird Clock in TikTok [closed]

I have seen a photo of a wall clock in TikTok. Can someone explain it? None of the comments there have any idea. The Malayalam text can be translated as "Those who understood hit duet". ...
23
votes
1answer
886 views

Three part chess problem

Three separate puzzles: ...
6
votes
2answers
204 views

Circle inside circle v2

This question is a kinda follow-up question to: Circle inside Circle You have a large circle with radius $5$ units and you also have a small circle with radius $1$ unit. But this time you have a 10-...
9
votes
1answer
189 views

Fill this Rangoli puzzle

I came up with this puzzle named Rangoli, which was a part of the Puzzle Ramayan, the qualifiers for Indian Puzzle Championship. Rules Every cell must contain one of the four letters ...
8
votes
1answer
160 views

Bicoloured 2048

I made a new puzzle game that you can play here. It is a variant of 2048 where there are tiles of two colours. You need to merge tiles of the same colour and value to increase your score. In more ...
12
votes
1answer
305 views

Crossword, but math!

This kind of puzzle is from my mom's puzzle magazines. There it is called Figure Logic. It is essentially a crossword, but with math. In crosswords, all words must be real words. In Figure Logic, no ...
8
votes
1answer
273 views

a difference of 29°

The eight words pictured here, along with their positions, can be divided into two groups of four words apiece. Identify the two groups and why each word-position combination belongs to its group. I ...
3
votes
1answer
127 views

What is the next item in this numerical sequence?

I found this on a test, and it's under "Numerical sequences". I can't figure it out. I tried using the numbers of the alphabet: 1, 2, 9, 12, 1, 2. I don't see a clear pattern. A,B,I,L,A,B,? ...
9
votes
2answers
244 views

Square made up with polyominoes

A 3 x 6 rectangle has 2 holes in it as shown. Can you cut it into 3 polyominoes with different areas so that they can form a square? The pieces can’t be flipped when they form the square and two ...
-5
votes
1answer
120 views

“Not a Red Herring”

Sorry if this is too easy, it is my first post on Puzzling.SE I am an iconic brand For a famous company Who prefixes their products with I.
9
votes
3answers
318 views

Food containing its reverse

When forwards, I am a type of food. When backwards, I am something contained within the food. What am I?
1
vote
1answer
52 views

Takeaway bonanza

Take away 1, I am even Take away 2, I am 22. Take away 3, I am the seasons. Who am I? Who may I be? Good Luck! First sentence hint: Second sentence hint: Third Sentence hint: It should be ...
6
votes
9answers
347 views

My prefix is round

My prefix is round, My suffix eats birds, I come in many different colours, What am I? This is my third non-math puzzle, so feel free to point out if there are any flaws!
7
votes
4answers
272 views

Largest and smallest hexadecagon with sides $1, 2, 3, \dots,16$

Of all hexadecagons lying in the cartesian plane, all of whose vertices are lattice points, and whose sides are of length $1,2,3,\dots,16$ in some order, which two have the largest and smallest area? ...
12
votes
1answer
174 views

My first is like an octopus

My first is like an octopus, her moves are one to envy. My second is a language whose, land spans far and plenty. My third is not a minor now, divided by a penny. And as a bonus - find my secret, ...
8
votes
2answers
236 views

Is there a root free solution for the 6s challenge?

So the 6s challenge consist of taking a number from 0 to 10 and, using only "common" operations and the number three times, obtaining the number 6. For example: $(0!+0!+0!)! = 6$ and $(4 - (...
6
votes
2answers
147 views
+100

Friday's Mirror Donimoes Problem

Help four ghosts find each other in a haunted house. I just finished adding a new puzzle to Donimoes, my collection of domino puzzles and games, so I thought I would post a few bonus problems here. ...
20
votes
19answers
2k views

When you take away two

I am an odd number. When you take away two, I become even. What am I? Edit: @hexomino got my original answer but I have come up with another valid answer. Edit 2: @QuantumTwinkie got my other answer....
9
votes
2answers
195 views

The special machine

There is a machine, which when you put a number card which has written $x$ on it, it will output a number card with $$x^2+10x+20$$ on it. John has a number card on his hand, then repeated the ...
17
votes
2answers
565 views

What Masyu do with the antique clock?

Anagram is needed, and it will answer: What Masyu do with the antique clock?
11
votes
1answer
235 views

Holding top trophy

Across 1. Gershwin recalled a song (4) 5. Musical intervals the net has essentially ignored (6) 12. Scavenger of old is trapped in darkness – poor lad (7) 13. Rearranged 1 across missing a distinctive ...
12
votes
3answers
677 views

Pythagorean triplets wheat field

A rectangular field has width $a$ and length $a+1$. We cut it into 3 triangles that all have integer side lengths. If all triangles have a different area, then what’s the minimum value of $a$? Please ...
7
votes
0answers
155 views

I.Q. Puzzle with grey and black dots that I cannot solve [closed]

So, I have been stuck on this for quite some time, but I haven’t found a solution yet! The things that I’ve noticed so far: The black dots are 6-7-8-10, while the grey dots are always two One grey ...
4
votes
1answer
95 views

What if your wordsearch was a crossword?

I'm trying (another) crossword variant from the same puzzle book. It's called a helter-skelter, the lovechild of a wordsearch and a crossword. Rules Each word starts in the box marked with its clue ...
13
votes
4answers
1k views

Three secret numbers and sum

Three students are given one positive integer number each written on a paper. Every student knows only their own number. Their teacher tells them that the total sum is 16. Later the teacher asks them ...
15
votes
1answer
387 views

An Island Getaway

My friend Pat is a travel agent, and each year we like to go to an island we've never been to before. Being a bit puzzling, Pat doesn't tell me our destination directly, but instead sends me a weird ...
15
votes
3answers
578 views

Largest and smallest dodecagon with sides $1, 2, 3, \dots,12$

Of all dodecagons laying in the cartesian plane, all of whose vertices are lattice points, and whose sides are of length $1, 2, 3, \dots,$ and $12$ in some order, which two have the largest and ...
8
votes
4answers
486 views

Circle inside circle

Here's a fun little math problem I made(by fun I mean no complicated methods needed at all.) You have a large circle with radius N with a cross in it to seperate the 4 quadrants(so that the figure ...
4
votes
2answers
303 views

Two Truths and a Lie: a logic puzzle

I'm crafting an answer to the game Two Truths and a Lie: each person playing the game says three statements (usually about themselves, though I'm ignoring that requirement for this), two of which are ...
7
votes
3answers
248 views

Knight Battle: The Face-off

Knight Puzzle Imagine a chessboard like this: You are the white knight and can move as a knight does in chess. Example: Your goal is to visit every square on the board using legal chess knight moves ...
4
votes
1answer
120 views

Wednesday's Mirror Donimoes Problem

Help four ghosts find each other in a haunted house. I just finished adding a new puzzle to Donimoes, my collection of domino puzzles and games, so I thought I would post a few bonus problems here. ...
5
votes
1answer
77 views

Cryptic Family Reunion: String of Pearls

The answer to this puzzle is a list of ten thematically related words or proper names or phrases. Each of these is clued cryptically, and the theme is to be determined. Since the definition part of a ...
8
votes
6answers
2k views

How many scouts are there?

At camp every tent is given a number. My twin lives at the reverse of my tent number. The difference between our tent numbers ends in two. What are the lowest possible numbers of our tents? A problem ...
12
votes
0answers
314 views

You are the admissions counselor at a school for magic

You are the admissions counselor at a school for magic. You are tasked with the job of sorting incoming students into one of various study-tracks provided at this prestigious institution. The way the ...
-3
votes
1answer
141 views

please help me with this logic based question.what is the missing block? [closed]

please complete the figure with one of 9 blocks below.
16
votes
4answers
1k views

The enclosure on a grid

On an infinite 1 by 1 grid, we want to make an enclosure with 20 fences that are each 5 units long. The two ends of each fence has to be on a node of the grid. What is the maximal area of the ...
0
votes
3answers
133 views

help me please with this question from pdf book for logic tests [closed]

please help find the answer. it says (translation from english to french) complete the missing block with one block from 9 block below.
5
votes
1answer
200 views

What was Matt's matchstick puzzle?

Something rather funny happened at our Puzzlers' meet the other day. "Oh hey buddy, can you hand me exactly 18 matchsticks? I wanna show you this new matchstick puzzle I came up with." Matt ...
4
votes
1answer
148 views

Can you fill $3 \times 3$ magic square?

In the magic square Each number in the matrix is unique and natural. Each row, column and the two diagonals add up to the same number (the magic constant). Can you fill in the missing numbers? \...
2
votes
1answer
148 views

Find the next term of the sequence

I created this puzzle. Find the next term of the sequence. cjJxa2JyMS9wcHAxcHBwcC8xTjJibjIvQjFucFEyTi8zUDQvOC9QUFAxUFBQUC8xUjFLMUIxUg== ...

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