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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5
votes
1answer
69 views

HAPPY BIRTHDAY!

Dear amigo, Joyful it is to be your friend. One of which, people can depend. So without further ado happy birthday to you. Happy birthday to you and - meh, Morah too. Usually there’s a ...
8
votes
2answers
251 views

Relationship Advice

I have big news! I finally have a girlfriend! She's really nice and is studying to be a cartographer. As you know, I don't have much experience with the ladies, so I need some advice. I have been ...
-9
votes
3answers
312 views

Who is the Killer from the following suspect in this image? [closed]

I did a lot of image search on google and found out the original source of the image is http://www.ghadahaleidi.com/ because there is a lot of debate I posted the answer myself and here are the ...
18
votes
4answers
2k views

What should he have said at the door?

A man walked into a store and spoke abruptly, "I need four apples, three eggs, a broom, a dustpan and well ... I suppose we need don't need any flour." After a pause to regard the new man, the ...
9
votes
1answer
223 views

Improbable Inequalities

I'm making a work decision, and in my as I weigh the digits {0-9} as they pertain to this particular situation, I find: In one case, this is true: ...
35
votes
19answers
11k views

Mysterious loss of weight

Now an entry into Fortnightly Topic Challenge #41: Short and Sweet A man enters a room and presses a button. Within seconds he loses 20 lbs body weight. How did he lose the weight?
8
votes
12answers
576 views

Write a Schrödinger's sentence [closed]

Write an indicative sentence whose truthfulness cannot be objectively determined before you try to find it out, but is immediately decided as soon as you begin to find it. The truthfulness must not ...
36
votes
4answers
5k views

Find average age without revealing your age

Ana, Barbara, Carol and Diana want to know their average age. But no lady wants to disclose her age. They decide a strategy and use a calculator (one that doesn't store steps) and tapped some keys ...
1
vote
0answers
98 views

What is the next number in this sequence [closed]

3, 8, 24, 72, 213, 668, 2064, 6312, ... What's the next number? This sequence mod 3 is 0, 2, 0, 0, 0, 2, 0, 0; mod 2 is 1, 0, 0, 0, 1, 0, 0, 0; mod 5 is 3, 3, 4, 2, 3, 3, 4, 2. And there seems to ...
9
votes
12answers
3k views

Time to call the bluff [closed]

You are located outside of two rooms which have a door between them. Each room has one or more computers whose total power is unknown, so they cannot be reliably used as proof-of-work to compare times,...
94
votes
8answers
6k views

Make all the statements true

Can you make all the below statements true with a single click? If yes, explain how. Three + Eleven = Ten Seven + Five = Six Two + Four = Eight NB: Single click means, with only a single left mouse ...
13
votes
1answer
285 views

A scar in the fabric of space and time - a true story

A few days ago, Leonard was invited to attend a ceremony held in the principality of Monaco, to celebrate the birth of a new member of the sovereign family. Now standing in the middle of a busy ...
9
votes
16answers
3k views

Ask one verbal question to figure out who is blind and who is mute among three persons

This is another "You can ask only one question" puzzle. This is an edited very restricted version There may be multiple answers but I could come up with only one. There are three persons in three ...
53
votes
4answers
6k views

The Secret Club

Since I was a kid, nobody wanted me in their super-exclusive clubs... the "House in the Tree Club"... the "Girls Only Club"... the "Whatever you are NOT Club"... but now that I am a skilled (and a bit ...
4
votes
1answer
175 views

Aye - Bye - Gye -?

I've got a new puzzle for everyone; as always I hope you enjoy, and best of luck! I'm not sure where the best place to start this story is, so I suppose I'll start with tomorrow. You see, ...
3
votes
1answer
225 views

A balloon and a vacuum

You have a metal water bottle entirely filled with a vacuum and you have a rubber party balloon (lets make it red). How can you use only the bottle to inflate the balloon with the air surrounding you. ...
8
votes
3answers
376 views

So, what's to do?

It's White to move and draw the game. What must White do? You must provide proof for your claim of what's to be done by any reasonable means. This puzzle was created by Nikita M. Plaksin, and ...
1
vote
2answers
429 views

'The Imperial triangles' trigonometry question

There is a very well-known family of right triangles in Mathematics called "The Imperial triangles". Let me explain you how they are defined: We say $T_n$ is the $n$-th Imperial triangle if these two ...
8
votes
1answer
299 views

TechSupport Issue ID#812

User ID: 3Aq47h-20dpc8l Language: English (UK) Today I noticed a strange text file on my Windows 10 PC's Desktop called "README.txt". Curious, I opened it and it read START → 2↑ → P 3→ ↑ P 4→ P →...
8
votes
2answers
230 views

Knights and Knaves on a (Not So) Deserted Island

One day, while flying your single-engine seaplane out over the Pacific, the electrical system shorts out, all of your electrical systems (including the radio) fail, and the engine dies. You are in a ...
8
votes
2answers
385 views

Grandpa's Crazy Math II: Another Grandpa Mystery

Grandpa says: "This is really a stretch but Prove to me S = 0.5 or 1/2 Grandpa and his very lateral thinking!
18
votes
2answers
9k views

A Non Math Puzzle. What is the middle number?

There are three patterns below. Two diagonal and one vertical. The middle number is common to them all What is it? It is not mathematical per se. NO partial ...
10
votes
2answers
357 views

They are all tied together

There are four different things shown below One Vertical One Horizontal Two diagonal All have one common thing (the ? box) which ties them together What is it?
10
votes
6answers
1k views

Twisted Vivaldi

There are 5 riddles. Each riddle will lead to a one word clue for the final answer. Your job is to guess the final answer. The problem is, each riddle has a twist: 1 of them is a red herring. 1 of ...
20
votes
5answers
2k views

What is the corner house number?

The Singh family lives in a housing development full of Scientists and engineers (god forbid!). The Home Owners have come up with weird ways of numbering their houses. K Street is all engineers ...
17
votes
11answers
4k views

No Shirt, No Shoes, Service [closed]

I was walking outside on a hot summer day, when I suddenly got hungry and walked to a restaurant to eat. I tried to go in, but I was rebuffed at the door. The server pointed to a sign outside that ...
10
votes
1answer
374 views

A story puzzle for you

My brother loves numbers. He likes to pick a number, reflect, and enjoy its presence. He picked a number and asked me to guess it. I guessed random numbers for twenty minutes. I never got it ...
-6
votes
3answers
219 views

the camel and the eye of the needle [closed]

A farmer told me, without lying: "you see this camel over there" showing me a camel eating, "it passed whole through the eye of a normal needle" How is it possible, knowing that I too do not lie ...
10
votes
3answers
492 views

Downfall - The Riddle

If forgotten, I will be back in September. If you think I am feminine, I will show you stop sign. If you are afraid of heights, I will throw you in the sea at twilights. If any mis event ...
4
votes
1answer
171 views

Rubio, please help Clark!

Clark who is consecutive in nature, lives in California near the 100th street. Today he decided to take his palindromic boat and visit France. He booked a room which has a number of thrice a prime. ...
10
votes
5answers
9k views

The Morality of Rice [closed]

This is a classic riddle of mine. Please read the scenario below for the setup. You are sitting around a campfire and a friend smiles and says: Sam: I have a riddle. Intrigued, you ask him what ...
2
votes
1answer
372 views

Who is Paul's girlfriend?

Persons: ...
2
votes
6answers
204 views

Two untrusted traders [closed]

I'm sure this has been asked before, but I tried searching and couldn't find it. I don't know the solution, and it is possible there isn't one. There is unsavoury pirate and an unscrupulous merchant....
13
votes
8answers
4k views

Four ships at the ocean with the same distance

Four ships are located at the ocean, such that the distance between all four ships is the same. How are the ships positioned?
11
votes
1answer
382 views

Mirror Mirror on the wall, who's the richest of them all? (I make billions #7)

Mirror Mirror on the wall, who's the richest of them all? (I make billions #7) Clue group 1: This spa provides a great relaxation rub. Earbuds are included too. I compared virtual machines, and ...
15
votes
4answers
1k views

Help with this riddle please

What can you take but not give? What takes hours to do but it’s over in an instant? You can get it but never save it. What gives you sight without seeing? Run without legs. Travel the world ...
12
votes
5answers
705 views

I make billions (#5)

I make bullions balloons billions (#5) Main clues: These statues are wonderful! I'm going to invest in the sculptor. Move faster! I need to finish the 18th hole and return this golf ...
-6
votes
2answers
157 views

Who doesn’t belong in the group? [closed]

Identify the ones that are oddballs B C Ba W H Fe Si Br Rn I N O P
3
votes
1answer
190 views

Holy Alphabet Arithmetic

$Given$: $A$+$B$+$C$=3 $B$+$C$+$D$=3 $C$+$D$+$E$=1 $D$+$E$+$F$=1 What is $E$+$F$+$G$=?
6
votes
0answers
269 views

What causes these signs to follow this relation?

Can you find why does the below relation hold true? Hint 1 Hint 2
-3
votes
1answer
82 views

Strange? Primes and Palindromes have no business being in this Place?

$1$ $1$,$2$ Good easy start $1$,$2$,$4$ As expected $1$,$2$,$4$,$8$ I know it is going to be easy $1$,$2$,$4$,$8$,$16$ why is he giving this? I got it! $1$,$2$,$4$,$8$,$16$,Prime ...oops!.....
5
votes
2answers
236 views

I make billions (#4)

I make billions (#4) For years did a sharp little verse, Grow fast in our ears like a curse, A tune on TV, Did subconsciously, Cause all to spend much from their purse, Who / what am ...
14
votes
1answer
341 views

What's up with my calculator?

As I am wont to do, I got a new calculator the other day. Obviously it needed a few test calculations: 5 + 6 = 11 22 - 17 = 5 10 + 3 = 13 4 * 6 = 24 OK, so ...
6
votes
5answers
769 views

The Starks, Parks, Clarks and their kids

Inspired by Martin Gardner's puzzle from his book John,a new student at the Math Department of the College, was invited to a get-together at one of the Professor's house. Professor Stark welcomed ...
4
votes
1answer
116 views

Deduce the Missing Terms in the Sequence

$NINE$ + $5$ $EIGHT$ + $3$ $SEVEN$ + $2$ $???$ + $?$ $FIVE$ + $1$ $????$ + $?$ $?????$ -$?$ $???$ - $?$
-4
votes
2answers
267 views

On Fri morning I was racing to work and took usual NYC train from Princeton and

I found a piece of paper with these scribbled on it Dark Thunder. X P X ...with P circled Silver Lightning. X X X... What could those X s possibly represent? Hint 1: Given yesterday Hint 2: ...
10
votes
1answer
230 views

Welcome to my kitchen

Today I mixed some food products and saw interesting outcomes. Silverbeet + Gelatin $\equiv$ Snickers Lime + Nacho $\equiv$ Kiwi Sesame + Tea $\equiv$ Popcorn Can you find how these ...
11
votes
1answer
513 views

Professor Roman gives unusual math quiz ahead of

His usual Monday Morning 8am class. This is for extra AAA credits. $A$, $B$, $C$ are distinct digits. $AA$, $BA$, $BBAAA$, $CBBBAB$ are distinct numbers. Please deduce these with concise reasoning ...
3
votes
1answer
218 views

Tom travels extensively all over. He was trying to figure out

The missing members in the following sequence. $A$, $A$, $A$, $A$, $?$, $?$, $?$ Please help him out.
1
vote
1answer
205 views

A sentence with all numbers [closed]

Crazy thought. Can you make an (grammatically correct) english sentence using english words which are all numbers? Each word in that sentence must represent a number. I am expecting a minimum 6 ...