Questions tagged [logic-grid]

Logic grid puzzles, first produced by Lewis Carroll, are puzzles in which correspondences must be drawn between multiple ways of describing the same list of objects, using a given set of clues about these correspondences. Such puzzles can be solved using a grid, but for pre-existing grids whose elements must be filled using logic, use the [grid-deduction] tag instead.

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Bunk-bed Brothers

When we were boys, our mother, because of a shortage of living space, built for me and my five brothers -- Nortie, Matthias, Jack, Kenneth, and Lloyd -- a big, beautiful, sextuple-decker bunk bed. I ...
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5 votes
1 answer
567 views

A streamer's diet

I'm in dire need of help. I've been hired to take care of a certain streamer during a charity event, but the instructions they gave me for meals and games are just, way too confusing! This one ...
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1 vote
1 answer
261 views

How to solve this North and South Sitting arrangement puzzle?

10 friends A,B,C,D,E,F,G,H,I,J are sitting in a row. Some of them are facing north while others are facing south. Not more than 2 persons facing the same direction sit together. They all have their ...
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5 votes
2 answers
201 views

Ernie and the Disguised Donors

I was spending the morning helping Ernie dig up the potato patch when he got an emergency phone call from the Society for Absent-Minded Mathematics Professors – it appeared that they had “A bit of a ...
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2 votes
2 answers
246 views

How to solve sitting arrangement questions with 100% accuracy?

There are questions of sitting arrangement like persons sitting in a circular arrangement facing inward/outward or both, or a linear arrangement or box arrangement etc. Sometimes a few data points are ...
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2 votes
2 answers
212 views

Quickest chess stalemate with Queens exchange

Continuing my previous puzzle. If both players cooperate, what is the quickest stalemate in chess that includes a Queens exchange, in a legal game?
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20 votes
2 answers
558 views

PSE Advent Calendar 2021 (Day 12): Christmas Confusion

This puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 100 reputation.< Previous Door Next Door > Part 1: ...
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1 vote
1 answer
232 views

Blood relations - who is married to whom and reads which magazines?

In a family of eight persons - P, Q, R, S, T, U, V and W - there are four males and four females. There are three married couples and two persons are unmarried. Each of them reads a different magazine,...
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1 vote
1 answer
426 views

How to create a logic grid given three categories?

How do they make the three category setup here? I do not understand how this works. A detailed answer to this is most welcome.
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5 votes
2 answers
1k views

Reasoning puzzle involving five friends and five departments

Five friends A, B, C, D, and E are working in 5 different departments M, N, O, P and Q and they earn different salaries i.e. 10,000, 15,000, 20,000, 25,000 and 30,000 and they all are of different ...
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6 votes
1 answer
231 views

Logic grid puzzle - Carson City Chronicle

I can't figure this one out. Any help would be appreciated. Journalist-in-training Janet Seymour's byline appeared in the Carson City Chronicle on six days last week. On each day (Monday through ...
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0 votes
1 answer
145 views

Books on a bookshelf

On a shelf the blue book is to the right of the red book, the yellow book is in one end, the black book is just before the white and the green is between blue and white. What is the order of the green ...
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5 votes
2 answers
722 views

Nine neighbors in a hotel

Alessandra, Marta, Cristiane, Camila, Eduardo, Janice, Giulia, Mateus and Lucas are neighbors who live in a hotel. On each floor there are three bedrooms: one on the left, one in the center and one ...
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  • 403
4 votes
3 answers
203 views

Who took Gwen's purse and jacket?

The puzzle is as follows: Four sisters went to the movie theater. While leaving the venue each one of them took by mistake the purse of another sister and the coat of another different sister. Maria ...
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4 votes
1 answer
227 views

Einstein's Puzzle with 5 furniture customers

Einstein had made quite a good zebra puzzle tough enough to confuse many people's brains. Today I present even tougher one, will you be able to solve it? There are 5 customers, who bought a different ...
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11 votes
1 answer
400 views

Cheesemonger's puzzle

An entry in Fortnightly Topic Challenge #45: Flags The cheesemonger wants to arrange the wheels of cheese on display. The display case has two shelves with space for three wheels of cheese on each. He ...
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6 votes
1 answer
281 views

An Artistic Bunch

Luke, Clive, Anton and Paul are four talented creative artists, one a dancer, one a painter, one a singer, and one a writer. (Though not necessarily respectively.) Luke and Anton were in the audience ...
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1 vote
1 answer
128 views

Who dances what musical genre and with whom?

The puzzle is as follows: 4 couples attended a magazine opening celebration party. These couples danced among themselves, all at the same time, to a disco suite, a pop ballad, a jazz tune and a waltz....
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1 vote
2 answers
162 views

Teachers around a circular table - who teaches geometry?

The puzzle is as follows: In a teacher's lounge there is a circular table where the teachers eat their meals during lunch time. The teachers' names are Albert, Benny, Charles, David, Henry and Felix, ...
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3 votes
2 answers
233 views

Asymmetric Logic-grid "Brentwood Puzzle": What are these people doing?

Three men, including Gianni and three woman, including Sachi are in line at the BrentWood post office. Each has two different pieces of business to conduct. The first person is a woman. Carlos wants ...
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3 votes
1 answer
264 views

Whose story doesn't add up? (v3)

"It's been weeks. This is taking too long. We finally rounded up the four suspects - the four people seen ducking into nearby shops right around the time of death - got their statements and still ...
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7 votes
3 answers
910 views

Whose story doesn't add up? [closed]

"It's been weeks. This is taking too long. We finally rounded up the four suspects, the four people seen ducking into nearby shops right around the time of death, got their statements and still ...
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5 votes
1 answer
629 views

Logic grid puzzle with five FBI officers

My friend sent me this puzzle over Discord asking if I could figure it out. I tried for over an hour and I got pretty far but I've hit a bump. The puzzle goes as follows, There are five colored doors ...
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8 votes
2 answers
292 views

Least number of marked symbols

I have a 7x7 grid, where I want to find the least amount of "marked positions" so a group of non-marked positions aren't bigger then 4 (only moving up, down, left and right and not diagonal)....
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4 votes
2 answers
196 views

Logic: Match the Potion to the Drinker

You are known as a great alchemist and potion master, and have spent the past decade developing a series of extremely powerful potions. You have made some great progress, but the potions are not ready ...
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3 votes
1 answer
166 views

The problem with the five farms

In the spirit of the so-called Einstein Riddle, I think everyone should try to create their own version. So here is mine: Five farms are next to each other along a country road (like in the next ...
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2 votes
1 answer
128 views

What is Scenario One and Scenario Two?

(1) In Scenario One the L***** are S**** (2) In Scenario Two the L***** are not I****** (3) No C****** has the same type of people in Scenarios One and Two (4) The C**** in Scenario One and P***** in ...
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3 votes
3 answers
579 views

Which city is the bus from?

There are four buses; their origins are the cities of A, B, C, and D. their destinations are the cities of E, F, G, and H. They park in a gasoline station in a line to get fuel. after a while, they ...
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4 votes
1 answer
194 views

Who has received a letter about energy?

Four administrators (A, B, C, and D) from a company have written letters about four topics: Energy, Security, Nutrition, and Manpower. Each letter has a unique topic, sender, and receiver. Information:...
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3 votes
1 answer
117 views

It's all in the 2's follow-up question

This is in regards to the solution in Slitherlink - It's all in the 2s I know it may seem dumb, but I don't understand the logic behind the second 2 chain in the solution. To help provide clarity ...
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8 votes
2 answers
303 views

How can I create written logic puzzles with multiple variables and the fewest number of clues?

When I refer to written logic puzzles, I mean those in which, for example, 5 men wearing 5 different colors of aprons are bringing 5 different pies from 5 different cities to 5 different booths in the ...
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6 votes
1 answer
278 views

Logic puzzle about six college freshmen

I found some logic puzzles on someone's blog from a few years ago, and have been trying to solve them. Here's the link to the page: https://hedgehogcomms.blogspot.com/2015/04/puzzling-over-logic-...
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1 vote
1 answer
318 views

Logic grid puzzle

I found some logic puzzles on someone's blog from a few years ago, and have been trying to solve them. Here's the link to the page. Please let me know if you have any suggestions! I have looked at ...
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4 votes
2 answers
365 views

The Genius Bank Robber

StackVille Bank & Trust - Robbed! The Robbery The bank is being robbed. There are millions in cash in the vault. The lone robber takes the manager to the safe and demands he opens it. The manager ...
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9 votes
1 answer
316 views

Pizza and Subs - Delivery Dilemma

The Delivery Dilemma The local pizza joint delivered pizza and subs. Three employees were hired to deliver: John, Heather, and Luigi. Based on the following statements: If John delivered pizza, then ...
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-1 votes
1 answer
129 views

The Team Roster Mystery

Game Day When the managers of the Tampa Times and St. Pete Sun met for their annual company baseball game, everyone decided by unanimous vote that they wanted a different method of choosing which team ...
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  • 2,105
1 vote
2 answers
152 views

What's the gorilla's address?

There's four houses next to each other, somewhere in suburb Netopia. Johnny lives in number 3. The red house is in between the white and yellow houses. Mickey does not live at the end. House number 9 ...
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  • 2,105
0 votes
1 answer
149 views

The Coding Contest

A coding competition in Netopia pitted each PHP Programmer contestant against every VB Programmer and C++ Programmer contestant, each VB Programmer contestant against every PHP and C++ contestant, ...
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2 votes
1 answer
116 views

The Magic LeaderBoard

Every Saturday at Netopia's Square, a peninsula at the tip of southwest Netopia, there is a leaderboard kept of Netopia's Square's six local resident wizards. (in no particular order) They are ranked ...
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4 votes
1 answer
257 views

Old Ladies Day Out

During this unfortunate Corona situation in Stackville the WalMart is closed every Monday, BestBUY is closed every Tuesday, the Liquor Store is closed every Thursday, and the bank is open only on ...
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  • 2,105
1 vote
2 answers
137 views

Diamond Division - Splitting up this found treasure

The Discovery One day while on an adventure, a great treasure was found in the Tenretni Cave by an Adventure Group known as Tenehtfrus. The treasure chest had beautiful diamonds in it. It was a ...
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  • 2,105
4 votes
1 answer
125 views

You Talkin' To Me?

Five long time friends whose given names were Johnny, Vinny, Frankie, Mickey, and Bobby, and whose last names in one order or another were Morino, Bucci, Orsini, Palmacci, and Galino, although living ...
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  • 2,105
2 votes
1 answer
145 views

Pizza Positioning Puzzle

Seating Arrangements Me ( I'm Johnny) and my brothers Vinny, Mickey, Smitty, Gino, and Pauly always take the same seat when we have our weekly pizza party at our favorite Pizza place - and we always ...
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13 votes
2 answers
825 views

Murder Mystery - Murder at The StackO Ave Tavern

Murder at The StackO Ave Tavern Each Saturday Night the local bar, "The StackO Ave Tavern", hosted a Poker Party. And each week, me and three of my buddies attended the event. Until this ...
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  • 2,105
2 votes
1 answer
158 views

Setka Puzzle - Complete grid using clues and sudoku-style logic; Tom Hanks

Theme: Tom Hanks This is a Setka puzzle; you can find more (along with a more detailed explanation of the rules) at our website, linked from our profile. How to play Setka, the short version: ...
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3 votes
2 answers
172 views

Great POTW Bake-Off

Pepper, Belle, Emerson, and Ralphie have just competed in POTW’s Annual Bake-Off. Pepper, Belle, Emerson, and Ralphie each came in first, second, third, or fourth in the competition. There were no ...
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1 vote
1 answer
128 views

Cannot distinguish between two possibilities for a logic grid puzzle about friends and hobbies

Marina, Mike, Roger, Phillip and Justin has each only one hobby from the following list: motocross, badminton, swimming, athletics and karate, but not necessarily in that order. It is known that: Who ...
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3 votes
2 answers
182 views

Logic grid puzzle with occupations where the clues involve degree of friendship or acquaintance [closed]

The puzzle is as follows: Brenda, Lara, Mie and Nancy have each one profession. These professions are, baker, graphics designer, photographer and cosmetologist. But not necessarily in that order. ...
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3 votes
1 answer
72 views

Setka - Complete grid using clues and sudoku-style logic; Theme - Fear Itself

This is a Setka puzzle; you can find more (along with a more detailed explanation of the rules) at our website, linked from our profile. Theme: Fear Itself How to play Setka, the short version: ...
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6 votes
1 answer
176 views

Puzzle - Snow Day Event

Daisy, Delilah, Donny, and Duke have each decided to participate in the snowperson building event. In decorating their snowperson, each of them has chosen a different colour of the scarf from purple, ...
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