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votes
2answers
152 views

Is there any pattern involved in the following sequence? [on hold]

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
150 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
115 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
162 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.
12
votes
0answers
253 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
182 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
215 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
176 views

A town E miles away?

I got this from my maths teacher What is the value of 'E'?
3
votes
2answers
71 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
505 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
369 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 ...
16
votes
3answers
468 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
149 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
3answers
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
726 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
426 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
89 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
104 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
278 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
237 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
235 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
552 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 [on hold]

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
274 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
724 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
211 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
474 views

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

Who/what am I? I am a stunning fresh shiny bandit HINT: HINT2:
6
votes
2answers
468 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
354 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
75 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 ...
0
votes
1answer
43 views

How to flip top row center pieces on a 4x4x4 Rubik's cube? [duplicate]

I'm trying to solve a 4x4x4 Rubik's cube by first reducing it to 3x3x3 and I'm stuck in the end. I've completed all sides, matched all corners, but two pieces remain and I can't figure out how to flip ...
0
votes
3answers
116 views

Family Relations

Now I am not sure if these kind of questions are allowed on this site but I found it interesting so here i go A points to B and says " His grandfather adopted my grandfather " . Now what is ...
12
votes
4answers
2k views

It's right here. It's very very far

IT IS DIVINE IT’S A KILLER IT’S A GIFT IT’S A MEASURE IT’S A SOLID IT’S A LIQUID IT’S QUICK IT’S A CAR IT’S HERE IN A GLASS HOUSE IT’S VERY VERY FAR ...
-7
votes
1answer
343 views

Find the missing link from the following verbal series

Three links are missing from the following series, one of them is a word. The answer is the word. bass gland guitar venom
3
votes
1answer
129 views

10x10 divided into the most number of rectangles of different area

How can a 10x10 be divided into rectangles such that there are as many as possible and they all have different area? Can you find multiple solutions that are not mirror/rotation of each other? Good ...
0
votes
1answer
49 views

7x13 rectangle divided into 13 different rectangles

Can you divide a 7x13 rectangle into 13 rectangles all of different area? Can you find multiple solutions? Note that rotations and mirrors don't count as separate solutions. Here is a similar puzzle ...
0
votes
3answers
73 views

4x7 rectangle divided into 7 different rectangles

Can you divide a 4x7 rectangle into 7 rectangles all of different area? Can you find multiple solutions? Good luck! P.S. @Deusovi wanted me to make puzzles that have an "aha moment", so here is my ...
-2
votes
1answer
66 views

Number Sequence Puzzles : Find missing number in triangle [closed]

Solve this question plz send me answer
4
votes
1answer
138 views

Prime magic star

Can you replace the letters with 10 consecutive primes such that the sum of numbers on each line is equal? I expect this to be solved with a computer. Good luck!
3
votes
1answer
145 views

Partition a 3x3 square into rectangles [closed]

Yesterday I watched "The man who knew infinity" about the amazing Ramanujan. Inspired by the partitions problem from the movie I came up with a puzzle: In how many ways can you partition a 3x3 grid ...
13
votes
9answers
3k views

Which person is telling the truth?

A person was killed. There are 4 suspects. A says C is the killer. B says C is the killer. C says that B is lying. D says that it wasn't him. There is only one person telling the truth. Who is this ...
4
votes
1answer
113 views

Family river-crossing

A family of six is crossing a river with a 2-passenger boat. The family includes the following members: Dad, Mom, Maid, Boy, Girl & Dog. Only the 3 adults can row the boat and the dog counts as a ...
3
votes
4answers
223 views

The hard-to-understand chain

I have a chain. I can extend this chain indefinitely. For beginners, this chain is hard to understand. They call it magical, yet it is not in reality. I used to only declare. But with this chain, ...

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