All Questions

We have 12 coins, and only 11 of them have the same mass. It can be assumed that all coins have identical appearances. We have a lever. How can we identify the special coin, by taking measurements ...

In a certain code, AFZALPUR is written as BCBGYVOS. What is the code for FARIDKOT? As per my attempts so far, I cannot find a definite sequence of encoding. Both A and Z appear to be encoded to B, ...

An entry for Fortnightly Topic Challenge #40, have fun with non-Chess puzzle! ;) Three young children: Red, Green, and Blue; were playing a classic game of Snakes and Ladders, when suddenly their mom ...

You have just arrived at work and walked to your cubicle, and after checking your emails, you are about to get started with your project, when you notice a strange new application on your desktop. ...

I've never used this before but i'm having trouble with this. Create a 3x3 Magic Square that uses integers from -10 to -2. By the way, this is a weird magic square since diagonals don't need to ...

A company makes mechanical keypad locks. The keypad is a set of five buttons arranged vertically. O O O O O The buttons are quite close together. Once a ...

Age a herb salad for a cat. (8) Wolfmother confused a shark. (6) Alias around the Spanish leader (5) The Colonel runs through that hibiscus patch (5) Ursine stench holds soothing plant ...

'Encrypted': 10101110001011101000000001110111000101011100011101110000000011101110100010111000111010111011100 Context: This is simpler than you think. So simple the solution to this problem would be ...

Entry into Fortnightly Topic Challenge #40 You've returned from your lunch break to a small package. Inside is a note that reads: Please come to my office at your earliest convenience. We have ...

I'm looking for straightforward puzzle types where it is difficult to determine ahead of time whether or not there will be an solution to the puzzle (and therefore one must either try to solve it, or ...

You have to think logically on this riddle; you may search anything you want.

https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjE64LUm5reAhUK11MKHQkBA9YQjRx6BAgBEAU&url=https%3A%2F%2Ffreebies.com%2Friddle%2Fwhat-doesnt-move....

Lost consciousness's rate of return is Spanish valuables in Swedish valuables. (5) The light side running a confused non-gay. (6) Stirring a Malay T for a grateful Spanish spirit. (6) Dear ...

I'm Daniel, a skinny teenager from New Jersey. My mom got a new job, so she and I had to move to Canyon City, California. I decided that I needed a new hobby, so I started taking classes at the YMCA. ...

So, my previous puzzle A Warped Chess Maze is somehow my highest voted puzzle on Puzzling SE. So, I'm bringing it back, now with fairy pieces! The fairy pieces will be explained in a bit, but the ...

In loser chess, the rules are the same as in classical chess but for the following points: The king behaves just as any normal piece and can be captured. There is no check, no checkmate, and the king ...

I found that 3abc+a+b+c formula is correct first and second triangle. But the result for third triangle isn't in the options. Can you find another solution? Source: It's from an old job admission ...

There is an 8-letter word in here, reading from top to bottom, picking one letter from each row. a b c d e t u v w x l m n o p d e f g h a b c d e i j k l m n o p q r t u v w x Can you ...

My five years old pupil Magnus is really on fire ! After three wins in the first, second and third games, he is playing White today in round 4 against one of the tournament's favorites (a child who ...

Five Managers - K, M, N, O and P - visited five Countries, F, A, B, G and K, such that each manager visited exactly four Countries. Further, each Country has a different capital city from among Merine,...

I had a quick idea for a puzzle that may or may not be too hard to solve, but nothing is too hard for Puzzling SE so let's give it a go. One of my friends gave me a list of classic books to read last ...

Given n > 1 items and a two pan balance scale with no weights, determine the lightest and the heaviest items in $\lceil 3n/2 \rceil − 2$ weighings. I tried splitting down the middle and picking one ...

I have a slight variation of the coin flipping problem. There is a line of $n$ coins on the table; some of them are heads up and the rest are tails up, in no particular order. The object of the ...

It feels like such a long time that I didn't post one... ...

Across ...

I finally tried my hand at a cryptic crossword. I don't really have any experience with cryptic crosswords, or crosswords for that matter so I probably broke like 300 rules. For example, 17 down is ...

P, R, S, T, U and V are six colleagues who work for Fan Inc. headquartered at USA. Each of them lives in a different city that is one out of P, R, S, T, U and V, not necessarily in that order. Their ...

This morning, at the coffee corner in our office, I met a colleague who mentioned he'd be joining a chess club. So I asked him: "And, how was your first evening at the chess club?" "Well, it was a ...

I am thinking of one of the following five letters R E L I C You can ask me one question to guess which letter it is. Rules No question related to the number of the ...

"Been playing some chess with my husband recently", my friend Megan began, as we sat with our drinks in Coffee Monarchy. "How'd you get on?" I asked. "Didn't get off to a good start, I'm afraid. In ...

input: 3 2 1 1 9 7 2 0 5 9 output: 111222111 input: 2 2 9 9 8 7 output: 99999 Please help me understand the relationship main :

I am new to picture cubes and I want to know how to flip an edge piece on a picture cube 3x3 without messing anything else up. Like here from this: To this:

The following partially-filled table shows the marks scored by 5 students named A, B, C, D and E in five different subjects, namely P, C, M, B and S. The marks scored by all students in all subjects ...

It’s been a while since I’ve made a Riley, so here’s one: With my prefix you get the president, chairman, pope, Take away the infix’s end, or you’d easily be fooled. In the suffix I was mostly ...

find the correlation between input and output. only a certain type of input is allowed and certain ouput is given

Is it fair to link clues both ways? E.g. can I do: 1a. Local girl gives 8 (4, 4) 8d. 1 gives smooth head (5, 5) I'm quite libertarian. What could I get away ...

[based on a true story] I have here some climbing holds that I've made. There are two relevant parameters: The angle on the top, and The thickness, as shown. Now it is definitely the case that $...

$\frac{1}{4}$ of the marbles in a box are blue. There are $24$ more red marbles than blue marbles in the box. The remaining $32$ marbles are yellow. How many red marbles are in the box?

Assume a set of numbers $S$ which must satisfy four conditions. (1) Partition this set $S$ into three subsets $U_1$, $U_2$, and $U_3$ such that the sum of the largest subset is as small as possible (...

A friend of mine encountered a number sequence and I cannot figure out what the pattern is. What number replaced the question mark? 8 32 72 222 48 50 272 ??? ...

Here, white is stalemated. The king is not in check, but white has no legal moves. Not because any move white makes would put the king in check -- which is how stalemates normally happen -- but ...

Problem I need help determining the algorithm for converting the input (question) to the desired output (solution). Known Solved so far is the equals placement i.e. ...

An institute runs batches training students in C#. A new batch starts on the 1st of every month and every batch lasts for exactly 3 months (thus at any given time, the students of exactly 3 batches ...

Newspaper Headline Insect Researcher Carroll Appleton alongside grandson Adam discover underground wormhole networks. Recover ________ earthworms. Fill in the blank. Following are the choices ...

Here I am again, with another See me once riddle. Have fun! See me once, at the start of the week See me twice, the men becoming bleak See me once, when gambling on chinese ground See me ...

So, one of my friends is a teacher, and, for one of their recent assignments, one of the teacher's students turned in this: hkszocukgdxkcmvkuhgcskflfpnwebqhttbxhpwokywiyevvfohlgzqklw 6n1 ...

A big book of words was brought forth to my north. A prominent Turkish-born priest to my east. A bad taste was left in French mouths to my south. Criminals are put to the test to my west. ...

Teapot riddle rules: I have one word which has several (2 or more) meanings. Each of the meanings is a teapot (first, second ...) You try to figure out the word with my Hints First Hint: Second ...

Not exactly a traditional chess puzzle, and I won't offer much of an explanation for fear of giving away the answer. White must mate in 0 moves, meaning he must deliver a check mate without touching ...

Here is a matchstick puzzle with TWO (possibly more) solutions. There are two types of matchsticks. 1 Short (eight and = sign) Total 9 2 Long ( All ones) Total 4 Please move 3 matchsticks and ...