# All Questions

16,662 questions
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### Find this Unique UVC Palindrome ( ignoring signs and decimal) from Given Fractional Relationship

Given: U, V, C are three distinct digits ( 0 to 9 ). UVVVV and CVVVV.U are concatenated numbers. Dot “.” Stands for decimal. Relation: $UVVVV/C= CVVVV.U$ Find U, V , C
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### Simple Maths Riddle 6

A sixth riddle! There's a function just (reserved) for me though you need three of me to complete it. Don't simplify (me) when the top's much larger; I'll ...
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### Number Sequence Series-Question 5

This a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is question 5: 342,765,?,242325 (It ...
216 views

### Three knights or knaves, three different hair colors

In a group of three people (A, B and C), everyone has a different hair color (blond, black or brown, not necessarily in this order) and everyone may be either a knight (always telling the truth) or a ...
132 views

### Statue Park: Five

This is a Statue Park puzzle (originally constructed for the 2019 24-Hour Puzzle Championship, as part of a Tarot card themed set -- no prizes for guessing which rank this puzzle was). Rules of ...
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### Fill the grid- 4.0

Grid again !!! Can you find what comes in place of '?' ? HINT 1 HINT 2 HINT 3 In text: 5234 2112 06?7 0964 Also Try: Fill The grid - 3.0 Fill the grid - 2....
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### Four Doors, One Escape

You are trapped in a room with four adjacent doors upon a wall. On each door is one of the first letters of the alphabet, in order, from left to right. You know that one of the doors leads to freedom, ...
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My friend gave those word sequences,you basically need to find the word that best fit the x line:trigon::circle:x Cone:ellipse::circle:x Primus:current::ultimo:x Cube:tetrapod::tetrahedron:x ...
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### How to approach finding a cipher algorithm when you have the code and the decoded text

I have a text that have been encoded into a grid of black and white pixels. I have both the grid and the decoded text, but I don't know how the text have been encoded. What's the best approach to ...
47 views

### Number Sequence Series-Question 4

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days if nobody could answer my question. Previous ones are here: Number Sequence ...
94 views

### Minimum number puzzle!

What is the minimum number of letters required to satisfy all the following clues? "especially bad" "earth's counterpart" "flows one-way, strictly" "release as outward flow" "being this is ...
49 views

### Uvc with Lots of Magic… Enjoy the Show!

Puzzling Weekend! UVc is back again with Lots of Magic... Enjoy the Show! Given: LOTS is being multiplied by F to yield MAGIC. Digit 0 to 9 are all represented by ten different letters in this ...
250 views

### Simple Arithmetic Puzzle 7. Or is it?

The Arithmetic Puzzles are finally back! The break I took was longer than expected... Let's start easy then. \begin{align}6\times8&=72\\10\times9&=6\\1\times1&=1\\18\times69&=\,?\...
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### Number of Days in a Year with Consecutive Perfect Squares

Given: Number of Days in a normal Year To Do: Express it in two different ways utilizing Squares of consecutive positive numbers.
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### Unknown 5-pieces cube puzzle - help recognize

I have strange 5-pieces cube puzzle which I can't solve for a long time. I don't know name of the puzzle and can't google it. I'm not sure that there are all pieces. Can you help to recognize it?
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### A game of cricket

This puzzle is part 14 of Gladys' journey across the globe. Each part can be solved independently. Nevertheless, if you are new to the series, feel free to start at the beginning: Introducing Gladys. ...
105 views

### Find the values of U, V, C based on the given relationship…useful for upcoming puzzles

Given: U, V, C are 3 distinct digits..values can vary from 1 to 9. CU is a concatenated number Solve for U,V, C from the following relationship: $U^V$ X $V^U$ = $CU$ This will give some basis ...
60 views

### Number Sequence Series-Question 3

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: 2020,...
166 views

### Pulling Apart a Jigsaw Puzzle

Assume you have a jigsaw puzzle that is also a tessellation. This means every piece has an identical shape and can be assembled into a 2D pattern that fills the plane with no gaps. Such a jigsaw ...
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### Can you Crack Cohen Family’s Cryptic Codes?

Cohen family of four ...each have their own single numeric code to generate first level access to the system. Before first level access is granted, system displays any one of the 4 single digit codes. ...
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### Shapes in the wild

New here so apologies if this is not quite allowed. Yesterday our department had a meeting in one of our conference rooms on campus. When we arrived the room was empty, but there were three puzzles ...
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### Cryptic crossword (printer's devilry edition)

All but nine of the clues are normal. The remaining nine are printer's devilry clues, whose answers are thematic. Solvers must fill the grid correctly and use the thematic material to identify an ...
173 views

### Number Sequence Series-Question 1

I want to share a question that is created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: 3/2,2/3,3/4,1/3,...
183 views

### For the price of one

This puzzle is part 12 of Gladys' journey across the globe. Each part can be solved independently. Nevertheless, if you are new to the series, feel free to start at the beginning: Introducing Gladys. ...
157 views

After pressing the button, the walls opened. This time, instead of a damp smelly room, a futuristic lab appeared. "What the-" exclaimed Cyrus. T.E.D. scanned the whole lab quickly. Cyrus ...
1k views

### Bookshelves: the intruder

Somebody has messed up my bookshelf by shoving a book into completely the wrong place. Which is the intruder?
158 views

### Number sequences: 000, X00… and 6X000X9, 700XX08

Q1: 000，X00，？，XX0 ，X00 Q2: 6X000X9，700XX08，00000015，？，00000015，？，00000015 These two questions actually come from the puzzles made by my friend. He gave me his puzzles recently but I couldn't figure ...
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### After seeing my 16xxxx16 sequence puzzle, my Younger sibling wants to get into the act and give a little puzzle of his own

In our Reptand prime family, as you know, everybody has our own signature Cycle length. My younger sibling unit has shorter cyclic period and he wanted to create little puzzle for you. He truncated ...
578 views

### Five Powers of Fives Produce Unique Pandigital Number…Solve for X..Tell me Y

Given: Y is a Pan-digital Number (no zero, 1 to 9 only) ending in 3. Pan digital number consists of all 9 digits 1 to 9..each digit occurring only once as is the case here. Last digit is given as 3 ...
113 views

### Can you solve this numerical puzzle

Puzzle goes like: 3, 2, 12 10, 4, 9 8, 6, 3 9, 6, 2 7, 4, (?) Can you answer what can be the (?) mark, with explanation
103 views

### Do Not Believe Her Lies [on hold]

So I was struggling in this "game" for almost 2 months and I still can't get through the level 7 in it. It's actually an online riddle game and it's quite challenging for me... If anybody want to try ...
82 views

### Composite Cat Cannot divide its immediate lower neighbors factorial without leaving a remainder

Find this unique composite cat given the information in this title.
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### Prime turns into Perfect Cube, if you reverse its digits and subtract…What is the number

Given: 1) I have more than one digit. 2) Reversed number is subtracted to give at least 2 digit number which should be a cube. 2) you don’t even need a calculator to figure me out. Who am I?
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### An easy English amusement for children [duplicate]

Here’s an easy one that amused me as a child. I don’t think it’s that well known, but has recently appeared on the internet so it’s trivial to answer if you look it up. It might be slightly more ...
166 views

### Solve this nice little everyday puzzle

What is the solution? Use only the hints that are really necessary to solve the puzzle: Hint 1 Hint 2 Hint 3 Hint 4 Hint 5 Hint 6 Hint 7 You may quickly solve it using this hint! Solution
739 views

### Roman Numerals Equation 2

This is a follow up for Roman Numerals equation 1 With your creativity and lateral thinking and any ways you can think of (except the restrictions below), make the following equation correct moving ...