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A puzzle that needs formal logical deduction to arrive at a solution.

0
votes
2answers
87 views

Country and Its Capital

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,...
0
votes
1answer
60 views

Finding lightest and heaviest?

Given n > 1 items and a two pan balance scale with no weights, determine the lightest and the heaviest items in $[3n/2] − 2$ weighings. I tried splitting down the middle and picking one side over the ...
8
votes
3answers
1k views

Coin removal problem

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 ...
0
votes
1answer
75 views

Home city and Visited City

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 ...
5
votes
4answers
189 views

Guess the letter in one question puzzle. It's a Relic [on hold]

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 ...
1
vote
2answers
91 views

5 subjects and their marks

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 ...
-1
votes
2answers
128 views

Who joined when?

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 ...
11
votes
4answers
2k views

This is simple: Just fill in the blank

Newspaper Headline Insect Researcher Carroll Appleton alongside grandson Adam discover underground wormhole networks. Recover ________ earthworms. Fill in the blank. Following are the choices ...
-4
votes
0answers
73 views

What will be answer of this logic sequence [on hold]

What will be answer of this logical sequence. This question is openly available on internet. So there is no copy right or permission issue. This question is from Korn ferry website. Please remove hold ...
4
votes
1answer
131 views

Coffee and a movie with friends

The day after our wedding, me and my wife Becky met our friend Charlotte and her husband Alan for coffee and a movie. Me: Hi Charlotte! Hi Alan! Charlotte: Hi! So, are you two finally married ...
21
votes
2answers
369 views

lolcatz can haz ur infinit cheeseboard

This is a problem on an infinite chessboard with pieces called lolcatz. They can move like queens or knightriders, but have a strange disadvantage... ... you've never heard of knightriders? Well, ...
-3
votes
0answers
124 views

What will be answer of this logical sequence [on hold]

What will be answer of this logical sequence. This question is openly available on internet. So there is no copy right or permission issue. Here is the link. https://www.trytalentq.com/how-to-...
0
votes
2answers
78 views

Cannot figure out who is saying the truth from these three statements [duplicate]

Fred: John is lying Bob: Fred is lying John: Fred is lying or Bob is lying "or" is inclusive I got that John and Bob are saying the truth while Fred is lying, but i'm not sure if it's correct (...
2
votes
2answers
151 views

Three statements, who is saying the truth?

Bob: Steve is lying Steve: Bob is lying Fred: Steve is lying or Bob is lying "or" is inclusive How would I approach this question? I honestly have no idea. I was thinking of making a truth table ...
2
votes
1answer
355 views

Missing item in pattern question

So I notice that the hexagon rises, so it should be A or B. But beyond that, I can't figure out why one of A or B would be correct and the other would not be.
7
votes
1answer
589 views

Murder in the Royal Court

An entry in Fortnightly Topic Challenge #40: Retrograde Analysis! I can't believe it! Last night we heard a bit of fighting... but we had no idea that... our King was in check, and my fellow Rook and ...
5
votes
4answers
414 views

Grandpa’s baseball cards [closed]

One day at a family reunion we found a bunch of baseball cards in Grandpa's basement. Grandpa said we could split them among all the grandkids. There were 5040 cards in all, so each of us got a lot of ...
0
votes
2answers
169 views

Screen Time Puzzle

Find the time of screening of each of the movies in each of the screens. Need help to solve this.Please share Approach. Source : IMS
-1
votes
1answer
110 views

Residential society [closed]

In a residential society, there are 120 people who either consume only tea or only coffee. Of those 120 people, 25 are children (which includes male as well as female children), and 78 consume tea. ...
0
votes
2answers
103 views

Ranking And Average

Four athletes A, B, C and D are evaluated on four different parameters – S, A, I and T. Further it is known that: I. Each athlete was given a score, which was an integer between 4 and 10 (both ...
3
votes
2answers
381 views

Water island puzzle

On a planet called T, there exists a continent called P, which is surrounded on all sides by water. The continent comprises eight countries – A, R, B, C, D, E, G and K – located contiguously on it, i....
0
votes
1answer
60 views

Athletes and their ranking

Link to Original Image Seven athletes — A1, A2, A3, A4, A5, A6, and A7 participated in a 100 m race on each day of a particular week from Sunday to Saturday. Ranks, from 1 to 7, were given to the ...
0
votes
1answer
81 views

Minesweeper challenge #4

While solving another Minesweeper puzzle, I ran into yet another unsolvable corner. Well, actually, this time I have two unsolvable corners in the same puzzle. Here's the bottom left corner: ...as ...
1
vote
1answer
172 views

Voting System Puzzle

Answer Questions 79 to 82 on the basis of the information given below: The year is 2089. Beijing, London, New York, and Paris are in contention to host the 2096 Olympics. The eventual winner is ...
2
votes
1answer
136 views

Who sits where?

Eight persons A through H each of a different profession among engineer, doctor, teacher, policeman, singer, mechanic, painter and politician are sitting in a row of eight seats facing the dias. Their ...
0
votes
1answer
84 views

Who won against Whom

Five teams from five different colleges- S, K, M, V and N, participated in Champions League (ICCL) played in the year 2008. Each team played exactly one match against every other team. But due to some ...
6
votes
1answer
122 views

Color Star (Semi - Instructionless Sum - Star)

Color Star - a semi-instructionless variation of Sum Star Known Rules of Sum Star Fill cells with numbers and shade all remaining cells such that Each dodecagon contains the numbers 1-9 exactly ...
3
votes
2answers
163 views

Who Visited and When?

During a particular year, exactly ten people ($A - J$) visited a certain city on five different days between January 1st and April 30th, in a non-leap year; such that on each of the five days, exactly ...
1
vote
1answer
134 views

Fairy Chess #2: The Angel

The sequel you've all (er, at least some of you have) been waiting for! Part 1 is here if you want to check it out. In this game, we have an entire army against a single piece yet again. This time,...
12
votes
2answers
320 views

Cannibalistic Words

Drawing from the word pool below, find the twelve Cannibalistic Words. (Note the no-computers and logical-deduction tags.) WILD _ _ ☐ _ _ _ _ ☐ PENS ☐ _ _ _ _ ☐ _ _ DEED _ _ _ ☐ ☐ _ _ _ BLED ...
3
votes
1answer
133 views

A Battle of Dysfunctional Kings (Chess)

So recently I've learned about fairy chess and I've decided to write a puzzle based around the topic. Today's variation features a chess board which is missing eight squares (A1, A8, C3, C6, F3, F6, ...
15
votes
2answers
1k views

Fairy Chess #1- The Mastermind

(Fairy chess is a general term for any kind of chess variant with pieces that aren't used in the normal game) (Inspired by The Black Prowler (chess)) In this variant, white has their entire army ...
7
votes
2answers
810 views

Ten people sitting at a round table

Ten people are sitting around a circular table according to the following conditions: There are two persons between X and U. Y is neither adjacent to X nor opposite T. P and T are adjacent to W. Q ...
8
votes
8answers
369 views

Infinite amount of theorems

We have an infinite amount of theorems $A_1, A_2 \ldots A_n$. Each one of the theorems says: "All of the following theorems are false.". Is there a single one of these theorems that is true?
0
votes
1answer
147 views

Husbands and Wives around a Circular Table

Please anyone tell approach. Source : time.com
6
votes
1answer
164 views

Truth tellers or liars among two people

Two guys, number One and number Two. You ask number One "Is there a truth-teller among you?". He replies and you have the answer to your question. What is number One and what is number Two?
1
vote
1answer
192 views

What is the value of X?

24 6 63 132 4 14 23 x 17 The answer is either : 21, 14, 3 or 2
-6
votes
4answers
163 views

What was the police officer's idea? [closed]

Two police officers suspected a man of kidnapping. Without sufficient evidence they couldn't search his car or his home. They also couldn't interrogate him. One officer had an idea which later led to ...
9
votes
1answer
197 views

Six gems, six shelves, and far too many puzzle rhymes

An entry in Fortnightly Topic Challenge #39: Deep Down in the Dungeon 1. You enter a well-lit, round chamber. As the party enters the room, the door behind you slams shut. No amount of effort can ...
6
votes
1answer
189 views

The Temple of the Niffugcam

An entry in Fortnightly Topic Challenge #39: Deep Down in the Dungeon 1 The party has entered the legendary Temple of the Niffugcam to recover the legendary artifact, also named Niffugcam. After a ...
5
votes
3answers
928 views

Engineers logic test for a job [duplicate]

Two engineers go to a job interview. They are introduced and told they are looking for people with team working skills. Without time to talk or get to know each other, they are guided to two different ...
3
votes
2answers
225 views

Weight, Height and Age of 6 boys

Six Boys – S, R, V, A, H and K – are ranked on the basis of their weight, height and age such that the heaviest person is ranked 1 and the lightest is ranked 6, the tallest is ranked 1 and the ...
2
votes
1answer
163 views

A Number Pattern Puzzle

I can't crack this one. Any help is appreciated,
3
votes
1answer
174 views

Portrait Puzzle

In an art exhibition held during the 70th Independence Day celebrations in Delhi, five portraits of five wellknown freedom fighters namely Mahatma Gandhi, Bhagat Singh, Lal Bahadur Shastri, Lala ...
1
vote
1answer
75 views

Minesweeper challenge #3

I seem to have run into yet another "unsolvable corner" while playing Minesweeper. The following segment is taken from the bottom right corner of the puzzle. There are 5 mines remaining, and all ...
4
votes
0answers
240 views

My brain froze trying to solve this [closed]

Try to figure out the missing numbers!
14
votes
3answers
521 views

Lau's Labyrinth

An entry in Fortnightly Topic Challenge #39: Deep Down in the Dungeon 1. Our heroes open the door and the remaining doors vanish accompanied by the sounds of grinding stone. The magnificent structure ...
11
votes
5answers
509 views

Distinct ball weights but balance on the scale

You are given eight identical-looking balls and a two-sided scale. All of the ball weights are distinct, but if you put 4 specific ones on the one side, and the rest on the other side of the scale, ...
9
votes
4answers
323 views

Different Teapot Riddle - fanmade

As inspired by @gabbo1092 in the first of this kind of riddle (see this for an example of how the answer works), I thought I'd come up with another riddle. Rules: I will give you a number of clues. ...
1
vote
3answers
164 views

Staggered Race Puzzle

This is puzzle on staggered race This is the Solution is given for question in image Question : What could be the maximum time for which Neeraj could have been in the second position in the race? ...