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6
votes
3answers
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.
-17
votes
2answers
287 views

Which animal does this weird thing? [closed]

Which reptile eats its skin after sunbathing? HINT: Hint2
1
vote
1answer
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 ...
-6
votes
0answers
105 views

Can you solve it..it's very specious to me.please [closed]

. important... please sovle .....................
-4
votes
0answers
80 views
20
votes
3answers
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:
14
votes
3answers
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 ...
4
votes
3answers
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 ...
0
votes
1answer
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 ...
0
votes
0answers
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.
5
votes
1answer
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 ...
0
votes
2answers
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 ...
8
votes
2answers
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?
-1
votes
2answers
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. ...
3
votes
2answers
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 ...
14
votes
6answers
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:
0
votes
4answers
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 ...
2
votes
1answer
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.
14
votes
2answers
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, ...
15
votes
1answer
1k views

Find d this ones stumped me help?

This one is annoying me so much. Got this from a maths teacher.
5
votes
1answer
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. ...
8
votes
1answer
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 ...
0
votes
1answer
179 views

A town E miles away?

I got this from my maths teacher What is the value of 'E'?
3
votes
2answers
72 views

Rubik's adjacent corners exchange

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 ?
3
votes
4answers
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 ...
5
votes
1answer
372 views

What's the idea?

They are not isotopes. They are not ions. What are they?
12
votes
3answers
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 ...
18
votes
3answers
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 ...
4
votes
0answers
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: ...
15
votes
5answers
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 ...
11
votes
2answers
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 ...
11
votes
2answers
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 ...
12
votes
1answer
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?
3
votes
3answers
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 ...
1
vote
1answer
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:
7
votes
2answers
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: ...
10
votes
2answers
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; ...
11
votes
1answer
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: ...
13
votes
1answer
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... ...
5
votes
2answers
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!
9
votes
15answers
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?
8
votes
2answers
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 ...
10
votes
3answers
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) ...
13
votes
1answer
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, ...
6
votes
1answer
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 ...
14
votes
2answers
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
-5
votes
1answer
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:
6
votes
2answers
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). ...
4
votes
2answers
356 views

8x8 grid with no unpainted pentominoes

What is the smallest number of cells you need to paint in an 8x8 grid, such that it contains no unpainted pentominoes? Can you find multiple solutions? Note that a pentomino is a set of 5 adjacent ...
1
vote
2answers
77 views

How to fill up the numbers in a set of empty discs drawing a pentagon?

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 ...

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