Questions tagged [lateral-thinking]

A puzzle solved through an indirect and creative approach, using reasoning that is not immediately obvious and involving ideas that may not be obtainable only using logic.

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2
votes
1answer
3k views

How many watermelons left with Mr. Bean?

Mr. Bean leaves from place $A$ with 3 sacks that each contains 30 watermelons. He comes across 30 tolls till he reaches place $B$. At every toll, Mr. Bean has to give 1 watermelon as toll for each non-...
1
vote
6answers
558 views

How many Pigeons are there?

There are pigeons sitting in a queue. The first one said, "There are 4 pigeons behind me." The last one said, "There are 4 pigeons in front of me." The middle one (or, one of middle ones) said, "There ...
-5
votes
2answers
277 views

What will I light first?

A person is stuck in a cold dark room without any light. In the room, there is a gas lantern, a gas heater, and a gas stove. The person has a match-box with only one match in it. What will he light ...
16
votes
6answers
2k views

Five puzzles in one!

This is an experiment of nested puzzles. The answer of each puzzle is necessary to solve the next one. Sometimes you have to manipulate it, sometimes you have to open your eyes (and mind). Run, to ...
11
votes
3answers
1k views

Birthdays celebrated in wrong order

A boy celebrated his birthday with some friends. Strangely, 2 days later, his elder twin celebrated his birthday with the same friends. Now those friends got confused and asked why the order was ...
14
votes
3answers
1k views

Ants playing tag!

$5$ ants are initially arranged on the corners of a regular pentagonal table (edges are long $L$), as showed in this picture: At some point they all start moving with a constant speed $S$ and, at any ...
12
votes
4answers
4k views

How did the inspector know that the report was fake?

A man was murdered in a village and the police inspector asked two constables to go to the scene and provide a First Information Report (FIR)... As it was night and the location was too far from the ...
101
votes
15answers
38k views

My wife has died

In 1980, a man lives on the 30th floor of his building. Every morning he wakes up, gets ready, kisses his wife, takes the elevator down to the first floor, and goes to work. One morning, he wakes ...
1
vote
3answers
734 views

Where the hell is Vincent?

Vincent was a software engineer working at Bell Inc, and well...he's gone insane. He is said to suffer from clinical schizophrenia, autism and severe anxiety. But there's one golden fact about his ...
11
votes
1answer
417 views

Echolocation System

I bought a device to map a set of caves, but I don't really know how it works. I pressed a button at a few spots in some of the caves, and it just printed out this gibberish: I'm sure you'll be able ...
2
votes
3answers
1k views

Find the killer's name!

A notorious serial killer going by the pseudonym "N" has dispatched a letter to the FBI after committing 45 homicides. He is characterized to be extremely intelligent and sends mysterious ...
32
votes
2answers
3k views

Ancient machine in the desert… how does it generate its output?

I was walking through the desert and came across an ancient contraption of cogs and gears. It had a series of dials on one side that appeared to allow the input and output of numbers. On the other ...
7
votes
1answer
734 views

The answer is a two-digit number

0870678884068983409815824039880670002291 Hint 1: Hint 2:
18
votes
2answers
1k views

Box of text contains hidden message

I invented a novel encryption technique that hides a message in the below text box. ...
20
votes
6answers
2k views

A Code from the Lines

Yeah. I think this puzzle will be the hardest puzzle on Puzzling... I'll add one hint per 3 days, I'll add a VERY helpful tag on the 3rd week, and I'll post the answer and explanation on the 4th week....
1
vote
1answer
248 views

Forecasters strike back!

Three forecasters, Phil, Jim and Bob, come out of their office during a rainstorm. Phil: The weather won't change until the next full moon. Jim: I agree, and the sun won't shine in 48 hours. Bob: I ...
1
vote
3answers
7k views

Folding a piece of paper in half [closed]

How tall would a piece of paper be if you folded it 100 times? (Assume a normal piece of paper, and that you could theoretically fold the paper perfectly in half.)
12
votes
3answers
783 views

Replace each ? in the expression with a digit or operator

In the following expression, replace each ? with either a digit or an operator: 8?5+??5-9?+3 so that it can evaluate to: <...
8
votes
1answer
662 views

A dollar, a penny, there's no difference

Sam is a gluttonous kid, so he decides to buy a colorful lollipop at the price of 1$ (one dollar) in the nearest candy store. Though, he realizes that he can't afford it as his budget is just 1¢ (a ...
18
votes
26answers
11k views

Building a 2 mile runway on a 1x1 mile island [closed]

You have a 1-mile long x 1-mile wide island. When taking off from a flat runway, a plane requires a runway of minimum length 2 ...
5
votes
1answer
319 views

Male and Female functions

You are given two goniometric functions: Male: $g(\rho, \Theta) = \rho \, \cos\Theta \sin\Theta$ Female: $f(\rho, \Theta) = \rho \, \cos^2\Theta$ Why are these two functions labeled "male" and "...
26
votes
4answers
7k views

Double whammy murder case! What happened?

It's Friday the 13th, and you and a group of 7 friends from the "Survivor" club belonging to University LeMao (A, B, C, D, E, F, and G) go camping. You're all pretty good friends, and talk quite a ...
3
votes
9answers
2k views

Find the odd one out: Hand signals [closed]

Not all of us are familiar with sign language. It is used predominantly by the deaf and people who can hear but cannot speak. But it's not a big deal in understanding some of the hand signals. Even we ...
18
votes
4answers
7k views

A semi truck weighing exactly 10,000 pounds

A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's actual weight limit (not the posted limit) is exactly 10,000 pounds; any more will break the bridge. ...
2
votes
1answer
631 views

4 Friends take a test

4 friends, A, B, C, and D, meet up after taking a test. Reading their results, they exclaimed, A says, "Hah! I'm ranked 32!" B says, "I'm ranked 63, better than you, A!" C says, "I ranked 12, I'm ...
32
votes
16answers
12k views

Older twin's birthday is one day after younger's

I have been asked this puzzle in an interview. There was not a lot of time left so I couldn't solve it quickly and the interviewer kind of let it go as he had to wrap up the interview Foo and Bar ...
16
votes
2answers
2k views

Houdini versus the chess masters

As we all know, Houdini is very good at coming out on top against improbable odds! And oh boy are the odds improbable. For his next great performance, he claims he can play simultaneous chess games ...
4
votes
2answers
709 views

Which number does 1995 correspond to in this number pattern? [duplicate]

I saw this puzzle many moons ago and so I assumed it would already be on here somewhere. I have looked and not found, though, and so I present to you a puzzle that baffled me when first I saw it. What ...
-1
votes
2answers
948 views

How many GREEN coats?

Yesterday at our local highschool there were 29 pupils wearing BLACK coats 27 wearing RED coats, and 40 wearing BLUE coats. How many pupils were wearing GREEN coats?
11
votes
3answers
3k views

Please help with this geocaching puzzle

Edit: added link for geocheck I have been working on trying to solve this puzzle for months and cannot come up with any solution. I have learned lots of puzzle solving methods in the process but I ...
8
votes
4answers
2k views

Find the width of the river

You find yourself with a friend on a completely deserted (devoid of objects or people) and flat plane. The only thing of note is a wide river; you can just manage to see the other side of it. There is ...
14
votes
1answer
1k views

How to ensure your logic puzzle has no loopholes?

Alright, say you've made this logic based puzzle, but when you post it, people find tons of loop holes, that obviously wasn't what you want! You didn't tag it with lateral-thinking or brainteaser! It'...
25
votes
9answers
15k views

How to cut 12 in half and get 7

Here's a puzzle that a teacher told me today: How can you cut twelve in half and get seven? Hint (only if you're stumped): Another Hint
0
votes
1answer
17k views

Puzzle about a deaf,dumb and a blind person [duplicate]

A deaf person stole a blind person's hen and a dumb person saw him stealing.How can the dumb person convey this to the blind person?
2
votes
5answers
3k views

The story of green apples and red herrings

Let's say we are in a magic land with lots of fantastical animals and plants and whatever... Imagine you have way too much time, really like apples and love collecting and growing them. In fact, ...
-3
votes
2answers
1k views

A dead body, a pair of scissors, no bruises, no cut. How? [closed]

There's a dead body on a bed and on the floor is a pair of scissors. The scissors were instrumental to his death. Yet there was no trace of blood. The body reveals no sign of any cuts or bruises. How ...
5
votes
4answers
3k views

Replace all letters with a digit and solve the equations

There are ten expressions written in the scheme below from left to right and top to bottom. Replace all of the ten distinct letters in the scheme with a single digit between 0 and 9 and make the ...
-1
votes
2answers
1k views

A man walks into a bar [closed]

He asks for a glass of water. The bartender pulls out a shotgun and points it at him. The man says, thank you and leaves. Why did he thank him?? Source
8
votes
1answer
1k views

I'm stumped on a simple roman numeral puzzle

I was working on this puzzle called cupid which listed a bunch of greek gods. I filled in all the answers in the answer grid which were their roman counterparts. Since these answers were now left ...
-6
votes
1answer
708 views

Strange marks on the Wall?

On an adventure looking through an Egyptian pyramid, you find weird marks on the walls. It seems as though they are different, yet strangely similar from hieroglyphics... Strange... Further down into ...
45
votes
3answers
3k views

Which floor does this company occupy?

There is a seven-story skyscraper. Each floor hosts exactly one company. Pangloss Washers Co, Ltd. is located on the 7th floor. Alice PC Chips Co., Ltd. is located on the 6th floor. Jumanji Arcade Co....
10
votes
2answers
2k views

A gold ring? A door? What am I?

Like my last post, if no one gets this for 3 weeks, I will post the solution. If no one gets this for 1 week, I will post a hint. Here is the riddle: In Korea, a door as bears fall up. In America, a ...
133
votes
4answers
7k views

Find the letters that complete these five patterns

Complete the last line in each of the following five series: Puzzle 1: "Using" is E "Desist" is I "Visits" is E "Design" is ??? Puzzle 2: ...
25
votes
3answers
3k views

What, the answer isn't the No of the Yes is?

Doorknob knows exactly how to solve this, so I ask him to not answer this question. Well, here's the puzzle: No, an answer is the cube without A, No? The Yes is No. The squared answer, Yes, is to an ...
5
votes
4answers
793 views

The Motionless Floating Eraser [closed]

First question here; I hope this question fits the rules well :) So, first please see the two images below: As you can find yourself, the eraser appears to float motionless over the register's page, ...
0
votes
3answers
3k views

Come out alive from locked room [duplicate]

You are locked in a 50 x 50 x 50-foot room which sits on 100-foot stilts. There is an open window at the coner of the room, near the floor, with a strong hook cemented into the floor by the window. So ...
8
votes
3answers
3k views

Looking at a die

I have an opaque 6-sided die. Without using mirrors or any other optical aids, what is the greatest number of faces of the die that I am able to see at the same time?
-3
votes
3answers
292 views

Formatting Puzzle! [closed]

This puzzle works best if you do not look in edit. If you do, please refrain from posting answers. So basically the idea is to count how many squares/rectangles this post includes. Don't ...
3
votes
7answers
3k views

How many faces does this object have? [closed]

The object came with a few clues to help you figure it out. I can be viewed on paper I cannot be viewed in reality by your kind I am made up of what your mind can truly comprehend I resemble ...
5
votes
2answers
3k views

How high is the nail in the tree?

When Lenny was five years old, he hammered a nail into a tree near his house to mark his height. Fifteen years later at age 20, Lenny returned to see how much higher the nail was. If the tree grew by ...