All Questions

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): ...

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 ...

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 ...

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

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, ...

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 $a_1$...

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 ...

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 ...

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 ...

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. ...

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. ...

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.

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

The puzzle's answer is a single word.

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 ...

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 ...

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 ...

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, ...

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 ...

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 ...

I was popular in the 1970s. I can be represented by the following image: What am I?

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 ...

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. ...

What word is missing? ...

What are the 4 steps, what is their theme, and what is the result? ...

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 ...

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 ...

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’...

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, ...

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 ...

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 ...

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?

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 ...

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 ...

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 ...

"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'...

The answer is a relevant word.

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 ...

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 ...

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 ...

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 ...

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

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

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