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2
votes
1answer
29 views

Cube Connect Challenges

Cube Connect is a Flow-like mobile puzzle game on the surface of a cube. Rules of Flow (which is simply Numberlink with colors instead of numbers; copied from Nikoli rules with small modification): ...
1
vote
1answer
42 views

Most efficient way for people along the edges of a grid to move to the center

I'm considering an $2k\times 2k$ square grid ($k\in\mathbb Z^+$) with $8k$ highly rational people standing along the vertices forming the perimeter. All of these people want to go to the centre of the ...
5
votes
1answer
38 views

Cryptic Acrostic 1: Off Balance

This is an acrostic puzzle which uses cryptic clues. If you're unfamiliar with either or both of those, click the associated link. A complete answer should give the quote, author and source, as well ...
1
vote
2answers
115 views

Consecutive integers which have digital sums that are not relatively prime

What are ten smallest natural numbers n, such that n and n+1 have digital sums which are not relatively prime?
4
votes
1answer
88 views

Themed Boggle Grids

Inspired by this puzzle, I created (or discovered) these grids. Within each Boggle board is a set of words with a common theme. To make a word in Boggle, connect at least three letters horizontally, ...
4
votes
2answers
93 views

Fold the plane four times to get the maximum number of cross points

You have a straight line $l$ in an infinite plane. You can fold the plane along any straight line so the line $l$ becomes two rays with a common starting point. In the picture we fold along line $a_1$...
11
votes
1answer
172 views

A week around Europe

I've recently returned from a week of travelling around Europe, visiting a different town or city in a different country on each day, choosing my destinations according to an underlying pattern. I've ...
5
votes
0answers
95 views

A puzzling stained glass window

On a recent trip to Europe, I visited a beautiful gothic abbey. Walking up the dark aisle between old wooden pews, the air heavy with the odour of incense, I could only marvel at the beautiful stained ...
38
votes
1answer
868 views

Escape across the floorboards

A mad lexophile sits alone in his apartment obsessively rearranging his Scrabble tiles and writing words on every available surface, even filling each floorboard with a word. The Scrabble tiles have ...
6
votes
1answer
234 views

Math homework help

Thanks so much for helping me fix my grades in math, but I need your help again. I thought my homework would be easy. But then my teacher gave me some sample problems, and I don't understand them. ...
1
vote
0answers
93 views

Connection loss

hint: Find last word. bd be cd fh de HE fe lh pt mt bo* LE mk LA* pk ms PE* ve mt wd RG* * Changing things leads to the desired outcome. ...
5
votes
1answer
124 views

What are these words or phrases?

Given below are clues for 4 separate words or phrases. What are those? 1 Five letter word Having not intended 4 Go inside Leland No partial answers please.
10
votes
2answers
587 views

Tipping a tetrahedron in a plane

A regular tetrahedron with one black and three white faces is positioned with its black face at the bottom of a plane. The tetrahedron is tipped several times over an edge and finally reaches the same ...
1
vote
0answers
76 views

steganography riddle [closed]

I have this image of Lena in BMP format, which consist a secret message: And I got this hint for this riddle: My initial thought was going over the image row by row and get the LSB of pixels in ...
9
votes
1answer
211 views

Double Choco: I love myself

Rules of Double Choco: (copied from here) Divide the grid into regions by drawing along some of the dotted lines. Each region should have one group of gray cells and one group of white cells; both of ...
-5
votes
0answers
72 views

What is happening tomorrow? [closed]

I posted this question on the Cross Validated stack exchange just now, but wanted to cross-post to here as well, because it is somewhat open-ended. A solution may be provided by myself or another ...
10
votes
1answer
1k views

What are you? Your fifth is in cookies but never in cream. -- a riddle

Your fifth is in cookies but never in cream. Your fourth is in stormclouds and also in steam. Your last's in your meaning but not in your word. Your second's in fourth, first, three-hundredth, and ...
8
votes
1answer
866 views

How many "mathletic" couples were having dinner at the table?

Once, a number of couples, each one of them happening to be composed of a mathematician and an athlete (hence 'mathletic'), wanted, in order to diversify communication, to sit down at opposite sides ...
14
votes
3answers
2k views

The Facebook (a double connect wall)

This is a double connect wall puzzle. The objective is to rearrange the sixteen people below in the 4x4 grid such that each row of 4 will be related by a common theme and each column of 4 will also ...
6
votes
1answer
1k views

Nobody Likes This Rebus

The puzzle's answer is a single word.
1
vote
1answer
81 views

How can I find the shortest path solution or even begin to finding the most optimal solution to a weld robot sequencing problem? [closed]

Not sure this belongs here, but I thought I'd ask: How should I come to an understanding of an optimal weld sequence for a weld robot that welds a physical item on a revolving carousel (the gray T ...
2
votes
0answers
201 views

IQ test question - squares, triangles, dots

I have this question from a friend. We have no idea where to start. What is the correct answer and reasoning? Source: "Ghid de pregătire pentru concursul de directori/ directori adjuncți din ...
13
votes
1answer
453 views

Pipelink: A Cat for jkittykitkat

Rules of Pipelink: Draw a loop through the centers of all cells. Two perpendicular line segments may intersect (cross) each other, but not turn at their intersection or otherwise overlap. Clues show ...
1
vote
1answer
176 views

What number comes next in this evenly doubled sequence?

I've been playing around with sequences lately and found a pretty evenly doubled sequence of single digit numbers: 1, 12, 30, 64, 65, 156, 175, 368, 369, 371, 752, 753, 1524, 1525, 3060, 3073, 6168, ...
1
vote
1answer
115 views

An oddly formed sequence?

I've been playing around with sequences lately and came across one that was rather, odd. $101$, $123$, $147$, $189$, $191$, $213$, $217$, $279$, $...$ Hints Let $N_i = 101$... Can you determine the ...
-1
votes
0answers
56 views

I need help figuring out this vigenere cipher [closed]

I got this from TheClineFamily who are running a contest on instagram Jpxppxmusxyqbsjqfjzmrnorvokoqvtftvpmqfwbqg The only clue I have to the key is this: March is my month. My time to shine. Don't ...
21
votes
1answer
3k views

I was popular in the 1970s

I was popular in the 1970s. I can be represented by the following image: What am I?
5
votes
3answers
303 views

Filling a grid with skinny trominoes which have arrows on their ends

Let's have a 10x10 square grid with 7 empty small squares. This grid is to be filled with skinny trominoes which have arrows at their ends (see figure 1). What is the maximum number of arrows which ...
10
votes
0answers
302 views

Spot that puzzle

This diagram solves an occasionally seen member of a well-known family of optimization puzzles.  Spots ● generalize a component that is represented variously in different statements of these puzzles. ...
17
votes
1answer
678 views

Hidden, concealed, imperceptible; What word is missing?

What word is missing? ...
5
votes
0answers
165 views

4 steps with common theme

What are the 4 steps, what is their theme, and what is the result? ...
15
votes
2answers
781 views

Imagine a Sudoku with Text-Only: A Gridless 6x6 Antiknight Antidouble Sudoku

Imagine the following Sudoku: Imagine the Sudoku has a 6x6 grid with standard boxes, 2 rows and 3 columns each; and standard digits, 1 to 6. Imagine it has an antiknight rule: identical digits cannot ...
12
votes
1answer
610 views

Eurasian nomads

Across 1. Theatrical musical interrupted by a tram construction (12) 10. One-time Vatican resident's right to boycott Toyota vehicle (4) 12. Exhausted courier crammed small boxes (6) 13. Hong Kong ...
0
votes
0answers
361 views

Cipher "Jpxppx...": March is my month [closed]

The cipher is as follows: Jpxppxmusxyqbsjqfjzmrnorvokoqvtftvpmqfwbqgbvfxukntupcneul No spaces or anything.. and this is the hint: March is my month. My moment to shine. Don’t write about me or you’...
3
votes
1answer
175 views

As simple as 1,2,3?

What is the next number in the sequence? 1, 2, 4, 3, 9, 5, 6, 10, 16, 7, 11, 8, 25, 12, 17, 13, 14, 18, 36, 15, 26, 19, 20, 21, 49, 27, 22, 23, 28, 37, 24, 29, 64, 30, 31, 38, 32, 33, 50, 39, 81, 34, ...
26
votes
1answer
1k views

Who? What? Where?

WHO did WHAT, and WHERE? PHILIP CAUGHT A BIG C LY NADINE DEEMED TIRAMI WAY MATTHEW FELT THE TARM YAK PETE FRETTED A LOT ABOUT C EEK AGO QUINN HAD TO G HIONERS ERICA NOW HOME MISSED H NICALLY ...
3
votes
2answers
365 views

A dance between numbers

Given the following equation: $$\Delta = \Biggl(\frac{t \mod 6}{(t \mod r) + 1}\Biggr)^2$$ Find the relationship between $t$ and $r$, along with the properties of each, that ensures $\Delta = 9$. For ...
5
votes
1answer
145 views

An unusual subtraction

I saw this note jotted on a piece of paper on my friend's table. Jickpom 1–0 Ecarombhp ½–½ Khalerop 0–1 What did he mean by it?
5
votes
2answers
2k views

What comes next in this sequence? 2, 3, 1, 5, 7, …

Here's a sequence I can't solve. It includes every number from 1-14, does not include 15 and 16, and then has a 17. I think there may be a pattern in natural number progression but can't find it. What ...
1
vote
0answers
250 views

The Popup Annoyance

The story Fred, a software designer, woke up, got dressed, took a shower, ate breakfast, then headed off for work. He sat down on his chair and booted up his computer, only to see that all the files ...
2
votes
3answers
265 views

Egg drop problem for infinite floors

This is a modification of the infamous egg drop problem, which I have seen formulated as in the following manner: Given $e$ eggs and a building of $f$ floors, how can we find the lowest floor at ...
9
votes
2answers
429 views

Clash of the Robinsons

"Ridiculous!" you think "What can be the odds? Either I'm hallucinating or the amateur writing this story plunged to new depths of incompetence." Both being equally likely you don'...
12
votes
1answer
393 views

What a tangled web we weave

The answer is a relevant word.
0
votes
1answer
231 views

The maze of everlasting flowers

You were recently caught trespassing on the queen's hunting grounds. The punishment for this crime is a miserable experience the locals call the maze of everlasting flowers: The full resolution of ...
14
votes
2answers
2k views

Modification of 100 lightbulbs problem (everyone flips 100 bulbs each)

This is a modification to the usual 100 lightbulbs in a room puzzle. Like before, the first person flips the switch of every lightbulb. However, while the second person also starts from the first ...
2
votes
1answer
344 views

A number like waldo?

What is the smallest whole number that when its individual digits are summed, produces a number 4 digits long? For example, the number $5357$ is no where close since $5 + 3 + 5 + 7 = 20$. Note: I'm ...
10
votes
1answer
295 views

Circling the rectangle: A strange IQ problem

I'm sure you're all familiar with pattern recognition puzzles where you have to find the next picture in a sequence. Well, I’m completely stumped on this one… Can you help? There is a sequence of ...
2
votes
0answers
193 views

Please, I don't know greek!

data key result 7, 2, 17, 82, 56 0 ΛΞλν 1, 3, 8, 127, 65, 8 19 εΤψΒΖ 5, 64, 13, 9, 4, 42 7 δδιΡΠ 13, 9, 8, 657, 31, 3, 7, 5 3 ? Hints
4
votes
0answers
262 views

What kind of sequence is this?

Start with 1 1 1 2 1 2 1 1 8 2 1 2 8 ? Your answer should explain what these numbers represent. Hint See the new tag
3
votes
1answer
328 views

Riley Riddles can be fruitful you know

My first Riley riddle... Hope you enjoy! My prefix might mean I kicked you My suffix gives a value. My infix might be a mother Altogether it has a bright colour

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