All Questions

Can you guess the theme? Note: Rather easy if you have the knowledge, despite my efforts to toughen it up, so please no image search!

The answer is But what is the explanation?

1: $60$ $60$ $60$ 2: $\frac{n(n+1)(2n+1)}{6}$ 3: $\sqrt{s(s-a)(s-b)(s-c)}$ 4: $\frac{21}{7}$ 5: 25, 36, ? 6: $>90$ Find what all of these mean or what they represent (What I ...

In this puzzle, you need to identify the minimum number of colors needed to color vertices such that no two adjacent vertices ...

Here is the photo of the code... I think. I don’t know what it could be, but it was duct taped to a pillar for several weeks before I was kicked off campus from COVID-19:

Text Version: ...

I need help for this puzzle. The name is Sto-Stone, a friend sent me for geocaching.

A F B D E C G A+B+C = B+D+E = F+E+G Numbers 1,2,3,4,5,6,7

Solve the following analogy. ":" means "is to" and "::" means "as". Text only:

Here is a room composed of $10 \times 10$ squared cells. Some cells contain a double-faced mirror ( / or \ ) that reflects the light with an angle of $90°$ on both sides. The other cells can be empty (...

The given analogy is 343 : 989 :: x : 669 What is x? 223 332 333 233

Felt it was time for another Density™ puzzle. Warning: May require thinking. Enjoy! Final answer: (3,4,4,4)

In below grid there are 2 numbers missing fill it with appropriate number . Text version: 69 10 13 192 ? 45 279 64 ? Hint :

Browsing an online store, you see this product. The reviews are pretty low, but it seems many people want it. What is it ?

Your friend Bob burnt out at his job, and went abroad for a long vacation1. He tweeted this today. Where is he ? 1 Note that Bob is not subject to lockdown since he is a hat. Hint

You are approached by 5 spotted frogs who appear to be venomous, to avoid getting bitten by them, you must find out how many spots they have. The frogs with an even number of spots always tell the ...

I thought up two positive integers with product less than $500$. I told their product to Penny, and their sum to Sandy, and told both of them the constraints and they are both perfect logicians. ...

Find out how the following letter-sequence is constructed: ...

Part 1: The disappearance of Beastly Gerbil I've been trapped here for what feels like forever. This is all I've known. Darkness. The occasional flash of light, but then back to darkness, always, ...

I tried to solve this sequence made of symbols: <=>, <=, >, <, ?, ?, => Here there's my reasoning: I thought this <=> as a full symbol and everytime the comma shifts to the ...

Here's a map: How to play Legend: B = Boost X = Objective (•) = ...

Rules (taken from Nikoli): Place light bulbs (circles) according to the following rules. Light bulbs may be placed in any of the white squares, the number in the square shows how many light ...

My prefix isn’t affirmative My infix is somewhat a ring My postfix isn’t a prime My whole ceases to be anything

This is a visual puzzle (known as "mosaic" or "fill-a-pix") with the same rules as MineSweeper: The grid is to be filled with colored and white tessera. Choose whatever color you like for the colored ...

Look at the conversation below Mary: Oh no! My ___________! John: _________ happened? Mary: I don't know! John: You're REACTing too much, EH? Clue 1: The answer is three words, but if ...

Fill the whole grid with Tetrominos. Every cell must be part of exactly one Tetromino. Tetrominos can be rotated as necessary. The colored clue cells must be part of the indicated type of ...

My friend gave me this puzzle. Here is the list of the places I went to, in this particular order, and their scores. United States (USA) 1890.19 Soviet Union (URS) 860.14 France (FRA) 749.02 ...

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...

We know the following about the numbers $a$, $b$ and $c$: $$(a+b)^2=9,\quad(b+c)^2=25, \quad(a+c)^2=81$$ If $a + b + c ≥ 1$, determine the number of possible values for $a + b + c$

He gave her 8 choices. 7 lead to death, one lets her continue. O6A O6B I6C U6D I6E I6F O6G O6H Of course, he knew she had no idea. He turned the hour glass and gave her 5 items from his suitcase....

In an analogy ":" means "is to" and "::" means "as/like". Now, since this is almost an analogy (maybe a future type), I will accept the solution if it's almost correct. Kinberg : ‴niɘɈƨnɘƨiƎ‴  :: ?

Do you know me or do you know where exactly I am? I am an island in the atlantic ocean. Every day, people appear and disappear on me. I am invisible to humans but machines can recognize ...

Can you find the message hidden within this grid of puzzles?

I've been challenged to solve this sequence, but I can not figure out the answer. I originally thought it was prime decomposition like: $96=2^5*3$ $12=2^2 *3$ $169=13^2$ But that reasoning only ...

Try to replace the question mark with the help of the clue! The clue will make you understand what those symbols represent. Now you just have to find the pattern! (The vertical bars are just there to ...

Anyone can please help with this question? Currently stuck here. Source: Mensa Norway

Find a word, whose pattern is such that is fits the nine letters as follows. Then change it accordingly so that its pattern becomes eight letters as follows respectively. ...

This image can be resolved to a single word. What am I? Images were taken from https://icons8.com/.

Can you place 6 queens from four different colours (24 in total), such that each queen attacks exactly one queen of each colour? They may attack as many queens of their own colour as these are ignored....

Across 1/5. Trouble with battle making a neighbourhood essentially warmer (3,5,6) 10. (See 14 down) 11. Place with obstructed view to Venetians, perhaps attracted to Mary Jane (5,4) 12. Activity to ...

These are three-dimensional Nurikabe puzzles. In each case, the four squares represent the layers of a $4\times4\times4$ cube. The goal is to shade some cells in each layer so that the resulting space ...

I have in mind a special kind of die, one that is even more fair than uniform density dice. If the die has $n$ faces with labels going from $1$ through $n$, then some faces will be larger than others ...

This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a Substantial Word™. Use ...

I know this is a very general question, but these kinds of puzzles are the only ones I can't figure out on my own. Rubik's cube, Twiddle, 16... (the last two are in Simon Tatham's Puzzle collection.) ...

Here is a very easy riddle for you: I am a piece of land but I am also technology. I am drowning and many people think that my time is over. But still, many people build on me. Some people ...

TL;DR: like this puzzle but with an arbitrary number of papers and without the condition that the papers chosen must be consecutive. You are given $n$ pieces of paper, and you write down $n$ distinct ...

Consider the following 4x4 grid : 972 9 5 55 18 22 x 28 50 24 25 26 7 400 52 4 Find x. However, as the title suggests, there are multiple solutions. You have to ...

He hadn't been responding to emails for days. When he was deeply involved in his work, delays were not uncommon, but not this long. Something was clearly amiss. Something had happened to my long time ...

This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. If a word conforms to a special rule, I call it a BFF Word™. Use the ...