# All Questions

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### Brillig! Another riddle!

A nice easy riddle to start the day with. ...
303 views

### Mathematical Puzzle

1 * 1 = 1 2 * 13 = 2 3 * 3 = 3 44 * 8 = 4 73 * 5 = 0 90 * 60 = 0 Q1) What is the smallest set of numbers under this operation that can equal 5? 6? Q2) What is 8 * 9? Hint:
869 views

### I am short lived… yet I love helping people!

My life is so short... too short, indeed. However, I like using it to help people live better. At least, this is what I was made for! Since my countless brothers and I were born, we've been ...
540 views

### Frugality 101: How to Replace Your Police Force with Cardboard Cutouts

In the far away land of Frugalia - a land where the conservation of money has been elevated to the status of any of Newton's laws - a conundrum is being had. There has been an upsurge in citizens ...
176 views

### Constructing Tortuous Tours

We'll define a tour of some N x M grid as any sequence of tiles such that the first tile is the bottom left corner, any two consecutive tiles are adjacent, and every tile appears in the sequence ...
325 views

### I'm doing a math puzzle but I wish it was a riddle… Do it for me?

AbcDEfg + aBcdefg + ABcDEfg = 24 ABcdefG + aBCDEFg = 2 AbCDefg + aBCdefg + aBCdefg = 0 AbcdEFg + aBCDEfg = 9 ABCdefg * AbCdefg = 6 AbCdefg + aBcdefG + ABcDeFG * AbCdefg = ???
3k views

### A Puzzle That Dims a Tornado

I visited a mysterious old man at the place where he lived and worked. He told me a story then he shook my hand. I felt very strange. I went outside of his house to clear my head. I saw a creature ...
2k views

### longest sentence using only one word and variants [closed]

This is an open ended puzzle of wordplay. Here's an example of acceptable words: reed, read, read, red, etc. They are linked by either different spellings of the same pronunciation (reed and read), ...
422 views

### Perfect strategy for the 2nd player in 'The coins on a table game'

I've just seen this and looked at the duplicate post it directs me to. I'm interested in a point raised in one of the comments in the answer, although it wasn't resolved in that question. It is ...
670 views

### Correct way to add 3 to sum(1/k!) to get 8

The recent spat of 22+4 puzzles took me back to 1974, when my high school math teacher (and cross-country coach), Dr James Quinlan, asked us to solve $$3+\sum_{k=0}^\infty \dfrac{1}{k!} = 8$$.
575 views

### On the fringe between two countries: what am I?

I seem physical... On the fringe between two countries, I have no proper home, but make one for others. Standing proudly for all to see, my purpose is often to conceal. Heterogeneous, I am part ...
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### The Fathers' Riddle

Fathers we are all Some of us with many Some of us with one Our children vary in appearance even more than we But helpers they are to one and plenty A few of us knew our calling A few others knew our ...
1k views

### Recursion - keep going

More than one basin submerges - vassals take wrong end of ash for ships. Wit and aspiration, alongside, hold up to take supper at harbour - pint (swallowed whole?) gives purpose. Foremost three ...
171 views

### Highest possible subtraction score of a word [duplicate]

If we define the "subtraction score" to be the amount of times you can subtract the last letter of a word and have the result also be a word, what is the highest possible subtraction score for an ...
2k views

### I'm greater in Hour than in Egg

A short riddle of hopefully moderate difficulty. I am greater in hour than in egg. I can feed you or help you sleep. I'm not smooth but I can. What am I?
6k views

### Two IQ Test puzzles nobody knows an answer to [closed]

Well, at least people in my social circles. Nobody's sure what the right answer is to both puzzles. This has been tormenting me for years and I hope somebody here has an idea. These are the puzzles: ...
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### What is the letter?

My mother has a prized tile. Unfortunately, I have smashed it and can only read the letters A N A S A O (In no particular order) One more letter fits but is incomprehensible. Please, help me find ...
4k views

### Queen of all Riddles

I am the leader of merchants, I am the only one of my kind, Yet the smallest of eight. Look up and you'll find me, Or down in the earth. I'll tell you when it's hot or cold. I was ...
5k views

### What is the answer that best completes the pattern?

What is the answer that best completes the pattern?
519 views

### Calculating column number based on Excel alpha column reference [closed]

Here's a super fun brain teaser!!! Can you give me a mathematical equation to calculate the column number of a Microsoft Excel column, given the alphabetic column reference? Let X, Y, & Z ...
14k views

### Function that is 1 for all positive integers but 0 at 0

A friend of mine had a simple question (at least to state) that I thought I would share: can you, without the use of indicator functions, find a(n) (elementary) function that satisfies \begin{cases} ...
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### How to solve an Enigma Puzzle without indication?

A friend of mine just wrote one thing on a board : TEJDAO QZ OCUQJ UVANBVCR The only indication was "Enigma Puzzle". If it is really an Enigma like code how ...
2k views

### The Time Machine works but my friend is gone!

So my friend Fred and I have been developing a time machine. I know it sounds impossible but we think we've hit a breakthrough! Fred has had a successful test run but he didn't tell me where he was ...
9k views

### Who stole the bitcoins?

Introduction You want to give bitcoins to a person you have met. Part of the deal is to give the bitcoins in the most untraceable way. So you have decided to send an email to him with the address (...
839 views

### The Naming of Parts

5) I turn the whole; the part turns. 9) I turn the part; the whole turns not. 0) Five turning circles has the part; four the whole. What is the whole? What is the part? As always, a good ...
2k views

### Where was the weapon hidden?

You are a detective working on a murder case. It seems all is wrapped up, except for one thing: the weapon. However, you have received an anonymous tip from Mr. Mister, who has a long history of ...
3k views

### Chocolate and a toy!

I'm in the garden, I've been to space, I've flown across the sky. I keep you well, I sum things up, I sit and watch time fly. What am I? HINT:
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### You're born with it [duplicate]

This is a riddle my aunt has translated to me from French several years ago: It's greater than God and worse than Satan, poor people have plenty of it and rich lack it, you're born with it but ...
165 views

### Combinatorial Agriculture, part 2

Your 64 acre square farm has been doing well and you decide to expand with an orchard. The orchard is also in the form of an 8-by-8 square of subplots, each of which can hold one tree. You have 3 each ...
719 views

### Protip: Don't leave your computer unlocked during a guess-the-song challenge

Me and my buddy, Jim, were playing a guess-the-song challenge. Of course, I was winning. (Don't tell him I said that!) After he left, I looked at my computer, and saw this written in gedit: ...
415 views

### The summer term exams must go on

The staff at Farthingbottom School are in a bit of a fix: the summer term exams are due to start soon, but the exam papers haven't arrived yet. Dr Linnaeus (the Head of Biology) takes care of ...
1k views

### A pirate's treasure-hunt

My dear puzzle friends, I need your help! An old acquaintance of mine has recently passed away and mentioned me in his will. I was quite thrilled, as the man was rather rich due to some clever ...
303 views

### The Diamond Game [duplicate]

Barkeep: Well hello there, come to play the famous Diamond Game? The rules are notoriously simple. Here's an ace of diamonds card (it's larger than normal), and here are a pile of pennies. We each ...
427 views

### A cell in an infinite culture

A single-celled organism is placed into an infinite culture. This cell has the genetic property that it has a $p = 3/4$ chance of splitting into two cells before it dies, and all its children will ...
213 views

### War Themed Cryptic Clues

Today is Memorial Day in the United States. In honor of those who gave their lives in war, here are some cryptic clues, the answers of which will be war related. They may be about famous battles, ...
570 views

### Can prove that any random numbers between 1-100 can be divided into two equal partially sum groups?

Can you prove that any 10 random numbers between 1-100 (No duplications) can be divided into two groups of numbers in which the sum of some (one or more) of the numbers from one group would be equal ...
322 views

### Expected value of a milion dollar (equal?) division

I've heard this riddle a while ago and it is quite interesting. Say I've got two sons and one million dollars to spare. Each boy gets one dollar as a start and from there I give them dollar by dollar ...
298 views

### 4 sums of flags (Part 2)

The previous 'Sum of' puzzles can be found here and here + = + = + = + = ? Which flag should replace the question mark? Hint:
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### What number is hidden in this gallery?

This is another chapter from the puzzle crime series I am running on my website (you can find two previous puzzles here and here). I asked a real artist to make the illustration for this one and ...
2k views

### A riddle that we all know the answer to - because we are a part of it

I'm a thing of two names. (It depends on from where you came.) And the name of 6 games. (Played by both gentlemen and dames.) This thing has brought our species much fame. (And in it we are all the ...
540 views

### For Memorial Day

I was asked to bring something specific for our big Memorial Day Barbecue. I was told to bring an item which is depicted by the following six pictures, though I'm guessing I shouldn't take things at ...
5k views

### The Rube Wordberg Machine

Gah! I used to be the brilliant one at Verba Retorta University, but ever since that damned Professor Wordberg showed up, there's been nothing but trouble. And it's all his confounded machine's fault! ...
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 ...
451 views

### I have to attend to a party tomorrow, but I forgot what it was

Today, my phone notified me of something that seemed important. tomorrow -> party with friends I completely forgot what it was for. I proceeded to ask my friends about a party of some kind that ...
2k views

### Welcome aboard flight 5932

Welcome aboard flight 5932, and thanks for getting on this flight. In the unlikely case you need or want to abort this flight, you will find there are two exits both at the top of the plane. This ...
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### Breaking up is fun to do

A quick one for language fortnight. A few days ago, my girlfriend broke up with me. We were never really right for one another, and I knew it was coming, but of course it still stung a bit. And ...
784 views

### A Ewe exception

Mr Roberts was looking for a pet. He visits the local pet shop to see his options. He enters the shop and is greeted by the pet shop owner, who doesn't speak English very well. Mr Roberts asks which ...