# All Questions

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621 views

### Number Equation Matrix

Can somebody please solve this? My daughter's school teacher gave her this puzzle to solve at home. But to me it seems a little out of order, and that's why I am asking here for help.
287 views

### Which animal does this weird thing? [closed]

Which reptile eats its skin after sunbathing? HINT: Hint2
62 views

### Find the missing number (number sequence puzzle) [duplicate]

Find the missing number 56784 = 4 11111 = 0 72348 = 3 88652 = 5 88811 = 6 75213 = 0 65465 = 3 62257 = ? I found this quiz in an archive of our company's ...
105 views

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2k views

### Can you put L trominos to fill the figure?

In the above picture, there are 24 squares. Can you only use L trominos to fill the figure? If yes, give an example. Otherwise, please explain why. An L tromino is like this:
1k views

### A pencil in a beaker of water

You have a beaker containing 100ml of (slightly salty) water, standing on a digital scale. The scale has been calibrated to the beaker so that it shows only the weight of the water, which is exactly ...
522 views

### Carousel Seating Logic Puzzle

Puzzle from my good friend and fellow Sporcle user, AuroraIllumina! Eight children are riding the carousel: four girls (Anna, Beth, Claire, Diana), and four boys (Eric, Frank, George, Henry). It is ...
78 views

### In this cylindrical tank, by how much will the level of the water rise? [closed]

there. In the following picture is a puzzling question from a primary school math exercise booklet for selective high school exams in Australia. I don't think enough information is provided to solve ...
51 views

### Question from the internet Mensa IQ Test #31 [duplicate]

I did the Norwegian Mensa web IQ test at http://test.mensa.no/. I have tried to solve this exercise for a day, but with no luck. I'm still puzzled by this exercise.
442 views

### Super Secret Cookbook

You requested the password for a super secret cookbook and received an SMS with the following content: 77733666688833 2555555 777772222337777 2663 777337555222233 84433 6688622337777777 9444844 ...
91 views

### City of thieves [duplicate]

During school I studied some cryptography and creating a story about it, I was able to create this riddle! I hope you like it <3 In one country all the inhabitants are thieves. Items cannot ...
212 views

### What is the word described in this poem?

My beginning is a time for a leader to lead. My middle is a type of insect seed. My end is a talk that’s shorter than a screed. I increased a problem that was losing all its speed. What am I?
160 views

### Is there any pattern involved in the following sequence? [closed]

Consider the numerical sequence $$800,1600,4800,6400,12000,6400, \cdots.$$ Is there any pattern involved in this sequence? I am very curious to know that. This puzzle is from a FlipKart Daily Quiz. ...
152 views

### Covering an 8x8 grid with W pentominoes

What is the minimum number of W pentominoes you need to cover every cell of an 8x8 grid? Pentominoes may overlap each other and sit outside the boundary of the grid. They can also be rotated in any ...
2k views

### Covering an 8x8 grid with X pentominoes

What is the minimum number of X pentominoes you need to cover every cell of an 8x8 grid? Pentominoes may overlap each other and sit outside the boundary of the grid. An X pentomino looks like this:
116 views

### Rectangles formed from every tetromino, tromino and domino

Can you form a 4x7 rectangle from every tetromino, tromino and domino? There are 5 different tetrominoes, 2 trominoes and 1 domino. Can you find different arrangements that are not mirrors/rotations ...
165 views

### What does this group of symbols mean?

This is what the puzzle looks like. Ꮒ̨̻̰̊̾ͥͦ͠Ꮛ̤̰̭̱̑̔̃̽̋ͬᏒ̡̼̯̳̺̳̺̙͖͈̠̂ ̗̗̗͔̮̀̾̉̃ͩ̿ͤᏁ̱̗͈̰̙̥̪́͊̅̎̅Ꮧ̵͚̥̼̫ͬ̒ͨ̏̅Ꮇ̥͉̂͛ͥ͛̽͐̕͟Ꮛ̨̫̭̋͛̆̋̾ What do they mean? It should be a name.
351 views

### I terrify those beneath

My beginning: steamy, but 2/5ths crazy My middle, wailing, from spectres hazy My end, demonic, lives in Hell My start, to there, does transport sell My middle, within, the original man My end, ends, ...
1k views

### Find d this ones stumped me help?

This one is annoying me so much. Got this from a maths teacher.
192 views

### Double feature: Hot stuff

This puzzle is part 4 of the Double feature series (first part here). The series will continue in "Double feature: In cold blood". Rules of Heyawake1 Shade some cells in the grid. ...
219 views

### What's the Word Given Other Words?

One word to sure make you think Nothing This word will certainly be considered too Pentagon I ate pizza as a part of my breakfast this morning, if that's important Clockwork Pay careful ...
179 views

### A town E miles away?

I got this from my maths teacher What is the value of 'E'?
72 views

I want to make the pattern as shown in the images I get stuck at the last with two adjacent corners to be interchanged. How do I do this ?
512 views

### Foiled Bank Robbery

A bank is getting robbed and one of the robbers tells one of the tellers to give him all of the money. The teller tells him she doesn't have access to it. Suddenly the phone rings. The robber tells ...
372 views

### What's the idea?

They are not isotopes. They are not ions. What are they?
2k views

### Can you catch the thief?

This was a puzzle I recalled from university a couple of years back. I don't know what the original puzzle is but if someone knows it, please let me know so I can credit the source. You are a police ...
491 views

### I'm not a whale or a dolphin

I'm a brave charismatic Iranian, And a cheeky Egyptian rogue, And a small mongrel amphibian, And a serene nameless lake, I'm all twelve of these things but only one at a time, Despite what you may ...
154 views

### Recurring Meeting

The computer scientist's assistant is late at work once again, trying to once again decode their bosses directions for the day. Under meetings, the boss has listed only a single meeting: ...
4k views

### Princesses covering an 8x8 chess board

What is the minimum number of princesses you need to place on an 8x8 chessboard so that every empty square is attacked by at least one princess? A princess is a piece from fairy chess that can move ...
2k views

### What Fruit Am I?

A riddle my math teacher asked back in 10th grade: I am a fruit. If you take away the first letter of my name I become a crime. Take away the first two letters of my name I become an animal. Take ...
736 views

### Twelve Labours - #02 Lernaean Hydration

This puzzle is part of the ‘Twelve Labours’ series. Previous instalments can be found here: Prologue | 01 His first labour now complete, Hercules made his way up the street to the storage depot for ...
430 views

### You may need me after too many

My first, a sight to behold before a drink My second, in the drink My third, a place for a drink My last, what may arise among lads after some drinks What am I?
90 views

### What patterns could be applied in order to solve a Sudoku?

Related to this Q&A. I am looking for a pattern that could be applied in order to solve this Sudoku. The current patterns that I apply: Ensure that every digit appears once in every block Ensure ...
105 views

### Figure out the pattern

$0,4,8,21,52,65,96$ Given this set of numbers figure out the pattern they follow and write down the next seven numbers in the sequence. Hint:
2k views

### Knights covering a 9x9 chess board

What is the minimum number of knights you need to place on a 9x9 chess board, such that every empty cell is attacked by at least one knight? Here is a similar question for a 10x10 chess board: ...
282 views

### The Riddle - I Own the Value Less Than Nine

I own the value less than nine; Mother makes me if child get cry; Manager checks me to find which is high; Lose me, addicts might be about to die; I could be either Apple or Android side; ...
239 views

### Masyu keep making those 3D puzzles?

This is a three-dimensional Masyu puzzle. The five squares depict the layers of a $5\times5\times5$ cube. The goal is to make a single loop in 3D space which fulfills the following properties: ...
243 views

### Piece de Resistance - Jack in all Tags… But Master in All?

Jack in all Tags... But Master in All? This puzzle is part of the "Piece de Resistance" series. Go back to Part 1 (Ace) for the story.Ace Two Three Four Five Six Seven Eight Nine Ten Queen King... ...
560 views

### Knights covering a 10x10 chess board

What is the minimum number of knights you need to place on a 10x10 chess board, such that every empty cell is attacked by at least one knight? Good luck!
5k views

### You see a boat filled with people [closed]

You see a boat filled with people. It has not sunk, but when you look again you don't see a single person on the boat. Why?
282 views

### Double feature: In concert

This puzzle is part 3 of the Double feature series (first part here). The series will continue in "Double feature: Hot stuff". Rules of Ripple Effect1 Fill the grid so that each cell ...
284 views

### Four hand tiled squares demonstrating a Pythagorean Quadruple

Demonstrating the Pythagorean Quadruple $6\times6 + 6\times6 + 7\times7 = 11\times11$ Using the pieces shown in the $11\times11$ square: The objective: Arrange the pink pieces (four enneominoes) ...
728 views

### I love fishing, dancing, playing, crafting, and fighting

I'm not a sketch, but I can be drawn, I'm not origami, but I can be folded, I'm not a pill, but I can be swallowed, I'm not a haircut, but I can be short or long, I love fishing, dancing, playing, ...
214 views

### The scales never lie (oh yes they do!)

There are $10$ coins, one of which is a fake, and weighs either more or less than the others - you don't know which. There are two sets of scales - one tells the truth, the other lies (always says ...
2k views

### Beware! Beware!

What are, famously... Ebon, sienna High, low Within, without, ubiquitous Distant, close Absent, present Swift and slippery, not to be trusted
487 views

### Give the name of this “outlaw” [on hold]

Who/what am I? I am a stunning fresh shiny bandit HINT: HINT2: HINT3: HINT4:
469 views

### 10x10 grid with no unpainted hexominoes

What is the smallest number of cells you need to paint in an 10x10 grid, such that it contains no unpainted hexominoes? Note that a hexomino is a set of 6 adjacent cells (horizontally or vertically). ...
The following pentagon is composed by $10$ discs. Each disc must be filled with one number. The allowed numbers to be used are the first $10$ even positive numbers. The sum of the numbers to be placed ...