All Questions

The answer to this puzzle is a list of ten thematically related words or proper names or phrases. Each of these is clued cryptically, and the theme is to be determined. NOTE: While the theme mostly ...

Are there Sudokus that are so hard that no known logical deduction techniques can reduce it? Maybe such a technique would reduce away multiple options?

What kind of car do I have? The clue words: stories, robbery, rock, minimum, old, ducks

Let's have two groups of countries. Each group has 36 countries. The first letter of the countries in the first group start with A,B,C,E,G,S. The second group of countries has as first letter T,I,K,L,...

There is a lot of literature on the subject of short English pangrams, that is, sentences that contain every letter. But I am curious what the shortest, or at least some of the shortest, sentences are ...

All by oneself: thrown out car, rotten feed, and amount of food found outside bird's house (18) The bird was never found again, and no fingerprints could be found on the car or the food. What ...

My prefix is a term for individuals of a certain gender My suffix is a particle with an electron owed My infix is a misnomer for ASCII code And I am a sprawling abode What am I?

Show that $$n =E(n*LOG((10*n)/(1+n))+1)$$ for $n> 0$ , $n$ is integer and E integer part(The ENT function on excel).

There is a road with length l meters. The start of the road has coordinate 0, the end of the road has coordinate l. There are two cars, the first standing at the start of the road and the second ...

Please find below a word search puzzle. But it's not just any word search...the words you find cannot be too dense. The definition of a word in this puzzle: appears in /usr/share/dict/words:https://...

Each cell in the lower-right 9x9 grid must contain a positive integer or be left blank. Numbers on the outside of the grid indicate the sums of one or more adjacent digits in that row or column, in ...

this is secret numbers that increase regularly, what is the order? If you like numbers, it will be fun. $2^3 \times224299$ $2^2 \times 3^2 \times 19 \times 3557$ $2 \times 5 \times 320647$ $2 \times ...

There is a function $f(x,y)=z$, and $2\cdot x<y$; $x, y, z \in N$ such that $f(x=2, y=5)=32$ $f(x=2, y=6)=36$ $f(x=2, y=7)=40$ $f(x=3, y=7)=48$ $f(x=3, y=8)=52$ $f(x=3, y=9)=56$ Question. Can ...

The smallest number divisible by 7 with seven 7s is trivially 7777777. Then, what is the greatest 77-digit number divisible by 7 which contains seven 7s?

My prefix lost its original position My suffix is in a different position My infix is in a fatal position My whole switched position

Poor defense speech leading to defendant finally being thrown out (14) The defendant never reached their prison cell. How did they die? jafe helped design the clue - thanks! :)

Which country's name cannot be written using only the first letter of any other country on the planet? For clarification, the first letters of the countries below spell GREECE. Germany Romania Equador ...

The daughter of a relative of mine, a fifth-year school student in Russia, got the following math homework from her teacher: Here's my translation: Logical task No. 26. Students were solving a task ...

My first could describe a call or a fell, in two ways, And it sounds like a way of going fast in olden times. My second could describe a paper or a cloud, in two ways, And docked it's almost my first, ...

So there is this excellent flash game, Monster's Den. In order to make a high score, I must complete many battles..this question is about battles with the Legendary Monsters. The target is to reduce ...

The answer to this puzzle is a list of ten thematically related words or proper names or phrases. Each of these is clued cryptically, and the theme is to be determined. Since the definition part of a ...

There are many topics that polarize. But not a single topic comes close to the one and only, age-old question that some claim is the root of all division between people: "Are pickles disgusting ...

http://free.ultimaiq.net/nse.htm 35, 147, ?, 2387 357, 1251, 152, ?, ?, 0 452801, 773924, 102410, 471056, ? 011010, 100010, 100010, 100010, 000010, ?, 100010 1001, 4524, 4299, 3984, ? 91420512, ...

A companion puzzle to the 'This new puzzle type needs a name' series, and inspired in part by @JeremyDover's answer to a recent question. Usually, puzzles in this series comprise a mash-up of two ...

Chase me and my feet are not slow Catch me then skywards I go What am I? Hints:

Real-life situation, this time. I was at work the other day and had just done something. I needed to tell a coworker he needed to do it as well, but he was on the phone at the time. Not wanting to ...

Across 1. Country girls finally returning home after being swallowed by snake (6) 6. Strong desire to omit essential part in writing important text (1,5) 11. Error usually eliminated within split ...

You are working on your geometry homework (graphic quadratics) and become bored of drawing the axes over and over again. Instead, you find an online tool called Graph-It that you use to graph the ...

The sequence is: 849 352 768 493 527 This one has been puzzling me for days. I would appreciate any insight.

I've been sent a bunch of very odd emails recently, starting on Monday and sent daily until last Thursday. I'm not 100% sure what they mean or why I am being sent them, but perhaps you could help me. ...

Today I share a 100% true story from my past. I use to meet my little brother to eat together with him regularly, but any time his friends or others that knew him would meet me the conversation always ...

This is probably very elementary for seasoned puzzlers yet I must request assistance with the following sequence: 119, 019, 609, 809, xxx, 909 What is the underlying principle here? Edit: Source: 2.2.,...

The goal is to find a sequence (a "program") of max 6 commands that will move the triangle (the "robot") through the grid and make it visit all the squares marked with a star. Two ...

Three thieves rob a jewelry store at gunpoint and end up with the following loot. 10 necklaces 8 bangles 6 rings It so happened that the jewelry was antique and valuable. They asked the scared ...

This is an extension of the discussion A robot is placed on a grid point. At each move the robot must take three steps along the edge of the grid. After each step the robot must turn right. Lengths of ...

Here is a new type of puzzle poem I made. Enjoy! Note: The title is named like that for a reason. I have a number in mind, it is super cool, But there's something you need to know, or you will find ...

I am trying to pick up advanced sudoku techniques by practicing with “difficult” puzzles as suggested by my sudoku app. In this puzzle, I am stuck in the position as shown below. I think I can make ...

So, there are these 5 good people. They have 5 bowls of roast chicken (one per person). They need to use both a spoon and a fork to eat. Only two people have a pair of utensils. They also are going to ...

This is a Pentominous puzzle. Rules of Pentominous: Dissect the grid into regions of 5 cells each. No two regions of the same shape can be adjacent (but they may touch at a corner). Rotations and ...

So from a couple other puzzles, you might remember that I'm a professor of Awesomeness at the Ad Hoc University! This time, I've given my students some numbers and their scorez. They need to tell me ...

Three prisoners are seated at a table. Each of them has a mobile phone on their lap, and they are not allowed to look at anyone else’s phone (and obviously no other form of communication is allowed). ...

When all is shadowed, dark as night, Just look for me out in the light. from June's Journey Railway Riddles

Complete this finite convoluted sequence of words renegade, epitasis, nihilist, etiolate, gallinae, ...

This is a Pentominous puzzle. Rules of Pentominous: Dissect the grid into regions of 5 cells each. No two regions of the same shape can be adjacent (but they may touch at a corner). Rotations and ...

Let's have the equation $(DX)^2-Y^2= ± Z^5$ and $x,y$ two positive integers greater than zero. From some facts we can obtain solutions of the above equation by giving integer values at $x,y$. Examples:...

$Z_1 = 1, Z_2 = 36, Z_3=?, Z_4 = 38346, Z_5 = 1246285, ...$, find $Z_3$ and $Z_n$? For info I have already $Z_n$; I just want to compare the results. And if you want more value from this series I can ...

There is a mall with 4 entrances, in each entrance is standing a doorman with a counter who counts the amount of people who entered through that entrance. If the counter reaches 200, the doorman ...

The are three switches (1, 2 and 3) and four lights (A, B, C and D). Each switch turns on exactly two lights and no two switches turn on identical lights. You know that Lights A, B and C are on when ...

There is a famous puzzle that asks for the next line (and the rule) for the following pattern: 1 11 ...

My prefix starts with blood. My suffix gives you permission. My infix goes really fast. My whole is the sight of blood.