# Questions tagged [liars]

Puzzles that focus on getting information from truth-tellers (who never lie), liars (who always lie), and/or Jokers (who answer at random), or which use such characters as an integral part of the puzzle.

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### Identify truth-teller amongst tricksters

There are 27 people. At least half of them are truth-tellers, others are tricksters. Tricksters can answer yes/no regardless of your question. But we should ask them such questions that truth-tellers ...
346 views

### Sixteen Castaways

Note: This was reposted from Knossos Games. I am not affiliated with the site in any way, shape, or form. Marooned on a tropical island. Forced to send one fellow member of their community home every ...
3k views

### Catch the liar(s). Prove it using a truth table

Alice: "If Bob is lying, Charlie is lying!" Bob: "If Charlie is lying, Alice is lying!" Charlie: "If Alice is lying, Bob is lying!" Who is/are lying? How do you prove it using a truth table?
650 views

### The Rapper's Crown?

You are running through a mysterious dungeon, when you see a large room, which you enter. Inside there is a man and a woman, one is a truth teller, and one a liar. However when they write they always ...
3k views

### Knights, Knaves and Normals - the tough one

I found this puzzle and I have difficulties to solve it: Imagine three people, Alice, Bob, Chris, each of whom is either a knight, a knave or a normal. Exactly one person in the group is a knight. ...
2k views

### A fish story on aymara language

Interesting story I stumbled upon: Aymara is a South American language spoken by more than 2 million people in the area around Lake Titicaca. Among the speakers of Aymara are the Uros, a fishing ...
3k views

### Who stole the jewels?

Maybe you guys can help me with a puzzle. Only one of the following is telling the truth. Who stole the jewels? Frank: Marcus didn't steal the jewels. Marcus: Leon didn't steal the jewels. Leon: ...
3k views

### Knights and Knaves Propositional Logic

I have a question regarding Knights and Knaves and logical proposition. If I want to solve the puzzle and I assume I have two kinds of citizens: Knights, who always tell the truth, and knaves, who ...
661 views

### Find the number from 10 statements

You are given the following ten statements and are asked to determine a particular number. At least one of statements 7 and 8 is true. This either is the first true or the first false ...
1k views

### Trick or Treating in Trutham-And-Ly

An entry in the 19th fortnightly challenge... Trutham-And-Ly, you may remember, is a small town in the north of Logistan. It is divided into two districts, Trutham and Ly, separated by a small stream....
262 views

### Confusing puzzle

So recently I came up with this puzzle/riddle that's really confusing me. So four people/Jokers are sitting at a table. Sometimes they tell the truth, sometimes they lie. My question is, which ...
5k views

### Unfortunately, you died [closed]

Your soul is on its way to the afterlife when suddenly you arrive in a room. You look around and notice six humanoids staring at you. You walk toward them and you can suddenly hear them talk between ...
172 views

### Bias and the Liar [closed]

A cylindrical glass has water half its height Some say it's half full, while some say it's half empty But if Clair the liar mostly tell what's not right Will she say "it is full" or she'll say "it ...
534 views

### The People Of Trutham-And-Ly

Here's an interesting variation on the classical liar puzzles: Trutham-and-Ly is a small town in the north of Logistan. It is divided into two districts, Trutham and Ly, separated by a small stream. ...
3k views

### Find the correct door!

This is my first puzzle but I hope it will work out well and that everyone can enjoy it. While trying to get out of a dungeon, you arrive in a circular room with 5 doors at equal distances from each ...
781 views

### How to find the treasure?

You are standing in a Heptagonal room (has seven sides). Each side of the heptagon has a closed door, totaling four white doors and three black doors. In front of each door is a guard. Four of the ...
2k views

### Testing a new liar type

I haven't seen this kind of liar type before, so here is a simple puzzle as a means for a trial run. In particular, I did check it myself, but with new mechanics it's easy to miss something (I hope I ...
319 views

### What is the right answer for this question, with 4 different conditions

I'm confused; what are the right answers for the following question under each of the 4 different conditions listed below? “Are you Lala, or lying today, but not both?” If you are Lala, and you ...
590 views

### Identify who is who between 3 persons who tell the truth and lie alternately

Dipsy tells the truth in 1 day and lies in the next day alternately. If today he tell the truth, tomorrow he will lying, 2 days later he will tell the truth, and so on. Lala tells the truth in 2 ...
2k views

### Star Puzzle: Determine which circles are True and which circles are False

A circle with number x means: “This circle is connected (straight line) to x circles with a true statement” This is valid only if the statement in the circle is True. If a circle is False, ...
2k views

### Trolls pretending to be Knights and Knaves

There are two Trolls, and each makes a statement. Troll 1 says "if we are cousins, then we are both knaves." Troll 2 says "we are cousins, or we are both knaves." Could both of the trolls be ...
6k views

### XKCD inspired logic puzzle

I came up with a logic puzzle inspired by this xkcd comic. I don't yet have an answer, and I am wondering if anyone can come up with one. You are in a room with three doors. Two of the doors lead ...
234 views

### Honeycomb structure statements (T/F)

2 1 1 3 0 2 1 Above honeycomb structure contains numbers. A number at each cell represent a statement. x : This cell is surrounded by x True statements. ...
1k views

### 5x5 statement table

Statement table. 3 2 1 4 1 2 3 3 3 3 3 4 6 4 4 2 3 4 4 3 1 1 2 4 3 Above 5x5 table contains numbers. A number at each cell represent a statement. x : This ...
641 views

### 5 guards, 5 doors, and probability

1st Guard: Always lies all the time. 2nd Guard: Always tells the truth all the time. 3rd Guard: 75% probability of telling the truth. 4th Guard: 50% probability of telling the truth. 5th Guard: 25%...
5k views

### Determine which statements are True, and which statements are False

Determine which statements are True, and which statements are False There are 3 consecutive False statements This is The First True Statement There are equal numbers of True and False ...
393 views

### Three truth teller boys on an island

Each inhabitant of an island are either a truth teller who always speaks the truth, or a liar, who always speaks falsely. Three boys P, Q and R who live in that island, are each either a truth ...
236 views

### A guy once said he lies. I still think what he really does [closed]

If a guy says "I'm a liar", what could we deduce from it? Is he a liar or not? let us say he isn't a liar, then his statement that he's a liar affirms that he is a liar. Let us say he is a liar ...
3k views

### I do not speak lies

A person was travelling in the middle of an empty road. As he walked, he saw five doors, with guards in front of each one. He had no other way of crossing the road. The first guard said, "If all ...
5k views

### Liar and the Truth teller with 6 inhabitants

There are two types of people on an island: truth tellers and liars. Truth tellers always tell the truth, while liars always lie. A foreigner meets six of the inhabitants, and asks each of them the ...
3k views

### How many of them are lying?

Here is a puzzle I am struggling to solve: Seven people are in an argument, but potentially some or all of them are liars. They give the following statements: Bob: "No one lies." Jennifer: ...
649 views

### Council of Magic, 5 years later - more spellcasters, more deception

Council of Magic - 5 Years Later: Five years ago, you managed to gain the support of the Council of Magic. However, now the King of Puzzlington needs their aid once again. As it worked last time, he ...
1k views

### Council of Magic - a palace of deceptive spellcasters

Council of Magic: The King of Puzzlington has sent you to a distant palace to gain the aid of the Council of Magic. As your luck would have it though, spellcasters are a tricky sort. There are 4 ...
868 views

### Knight, Knave, Magician

In your quest to escape a Magician's lair, you are greeted by 3 identical looking gatekeepers. You can only proceed after correctly identifying which one is which. The only trouble is, they can ...
7k views

### Find the identity of the four troll brothers

The four troll brothers Wudhor, Xhaqan, Yijlob and Zrowag have the following properties: Wudhor always says the truth. Xhaqan always lies. Yijlob lies or says the truth unpredictably. ...
71k views

### Why does this answer to "two doors with two guards" work?

On this post: Two doors with two guards - one lies, one tells the truth the most common answer for this riddle is given. However, while the answer marked as correct is the most common solution I found,...
6k views

### A death at a restaurant

You are a mafia leader and because of mysterious recent developments, you had to call the meeting of heads which is happening right now at your's cousin restaurant. The problem is, after the opening ...
7k views

### Who committed the crime?

A crime has been carried out by one person, there are 5 suspects. Each suspect is asked under polygraph who they think committed the crime. Their answers are as follows: Terry : It wasn't Carl, It ...
663 views

### Telling the truth

Atal said Sonia did it. Sonia said Kumar did it. kumar said George did it. George said that he didn't do it and Laloo confessed that he did it if Atal didn't do it. One of the five of them did it ...
4k views

### Statements that the deities True and False cannot say

You over exert yourself working on logic puzzles and die of exhaustion. You are awoken by the omniscient deities True and False. True only speaks true statements and False only speaks false statements....
675 views

### Thirteen people telling truths or lies

A: There are exactly 5 people telling truths, while others are telling lies. B: F tells lie. C: E tells lie. D: G tells lie. E: If D is telling truth, B is too. F: If E is telling lie, C is too. G: If ...
1k views

### Puzzle to find one good person [duplicate]

There are 15 people who may lie or say the truth(bad people) and 16 people who will always say the truth(good) . Suppose A- bad person , B-good person and C-bad person, when asked about A, B will say ...
1k views

### The two neighbouring islands

A puzzle was asked in a mental ability test. Arstil and Byzinte are two neighbouring islands in a far-off corner of the world. The natives of Arstil (the Arstillians) and the natives of Byzinte (the ...
450 views

### The truth and lie mess

There are two persons with special traits such that : One speaks only lies and no truth on Monday, Tuesday and Wednesday and all truth rest of the week. The other speaks only lies and no truth on ...
2k views

### A Race of Liars

You find yourself in a strange land where a race with five participants has just taken place. Each of the runners is a different age, and each either always tells the truth, always lies, or strictly ...
3k views

### To Tell The Truth

Four friends get together. One tells the truth all the time. One lies all the time. One tells the truth on odd-numbered days and lies on even-numbered days. One tells the truth on even-numbered days ...
2k views

### The Expedition Into The Ancient Cave

You are a archeologist and have taken 8 of your students on a expedition trip to a ancient cave to try and find ancient treasure. After you and your team entered the cave, you travel as a group ...
3k views

### Who are the truth-teller dwarves?

Infomation/Story Your prince is bewitched and asleep. You have to feed him the good apples (from the truth-teller dwarves) to save him. But be careful. Only the truth-teller dwarves, who only tell ...