Hottest Questions This Week

15

votes

2

answers

2k

views

Hotaru Beam Puzzle: Is it impossible?

modified yesterday Fax 164

20

votes

2

answers

1k

views

Not so random walk

mathematics

modified Jan 18 at 16:24 Stefan 526

37

votes

1

answer

1k

views

Didn't you ask me for a crossword?

logical-deduction word grid-deduction sudoku crosswords

modified Jan 20 at 16:39 Stiv 60.5k

4

votes

2

answers

1k

views

Why is “HADAT” the solution to the crossword clue “went after”?

crossword-clues explanation

modified Jan 20 at 16:32 Beastly Gerbil 44.4k

24

votes

1

answer

1k

views

A Puzzling Sudoku (Warning: Hot!)

logical-deduction grid-deduction sudoku

answered Jan 18 at 22:36 Jeremy Dover 16.9k

25

votes

1

answer

1k

views

The Blank Sudoku

logical-deduction visual grid-deduction sudoku

answered Jan 18 at 0:31 WhatsUp 3,879

4

votes

4

answers

343

views

How to get the least number of flips to a plastic chips to get a certain figure?

visual optimization lights-out

modified Jan 20 at 21:17 bobble 6,752

5

votes

4

answers

531

views

8x8 square with no adjacent numbers summing to a prime

mathematics combinatorics primes latin-square

modified 2 days ago user3808394 111

7

votes

4

answers

569

views

Divided by Pie Squared. Aaahhh

mathematics geometry dissection

modified yesterday Gareth McCaughan♦ 102k

20

votes

1

answer

881

views

Sudoku in Technicolor!

logical-deduction visual grid-deduction sudoku

modified 2 days ago Lukas Rotter 4,604

6

votes

3

answers

519

views

Table of mathematical expressions - fill in 1-9

mathematics logical-deduction arithmetic

modified 2 days ago Misha Lavrov 966

6

votes

3

answers

648

views

I am thinking of a number

mathematics

answered Jan 17 at 12:22 Paul Panzer 8,892

6

votes

1

answer

616

views

Finding the median of 5 numbers

mathematics logical-deduction

modified yesterday Jaap Scherphuis 33.5k

13

votes

1

answer

239

views

A No Sensa Test Question with Mediterranean Flavor

knowledge pattern

modified yesterday Bass 57.3k

15

votes

1

answer

454

views

Chain Puzzle: Video Games #01 - Teleporting Crosswords!

logical-deduction knowledge cryptic-crosswords video-games

modified Jan 19 at 2:35 Gareth McCaughan♦ 102k

-2

votes

4

answers

312

views

My prefix, suffix and infix are right in front of you right now [closed]

riddle word wordplay affix-riddle

modified Jan 18 at 14:42 risky mysteries 7,703

11

votes

1

answer

451

views

A Difficult Wacky Sudoku - SS#8

logical-deduction grid-deduction sudoku

modified Jan 17 at 20:55 Jeremy Dover 16.9k

3

votes

2

answers

344

views

In the sea or in the sky

riddle word rhyme

modified Jan 19 at 22:58 Amoz 1,944

10

votes

1

answer

344

views

Nurikabe: The Super-Kabe Attacks!

logical-deduction grid-deduction

answered Jan 18 at 3:19 Jeremy Dover 16.9k

3

votes

3

answers

333

views

4x4 grid with no trominoes containing repeating colors

mathematics combinatorics polyomino

modified yesterday iBug 2,035

12

votes

1

answer

326

views

+100

Skyscrapers in Sudoku!!! - SS#10

logical-deduction grid-deduction sudoku

modified 1 hour ago Beastly Gerbil 44.4k

2

votes

2

answers

286

views

Four touching circles

mathematics geometry

answered Jan 19 at 10:40 hexomino 105k

9

votes

1

answer

417

views

Sudoku with no grid and no numbers!!? - SS#12

logical-deduction grid-deduction sudoku latin-square

modified 2 days ago bobble 6,752

11

votes

1

answer

148

views

Sudoku: Odd Bonds

logical-deduction grid-deduction sudoku

modified 5 hours ago Alaiko 4,436

3

votes

5

answers

482

views

Ma turned 34 in 2002. Really?

enigmatic-puzzle lateral-thinking

modified 8 hours ago DrD 28.6k

9

votes

1

answer

282

views

A 7x7 Suguru - SS#9

logical-deduction grid-deduction sudoku

modified Jan 18 at 22:33 Beastly Gerbil 44.4k

3

votes

2

answers

435

views

How to fill 1/3 of the cylinder?

mathematics geometry three-dimensional

modified Jan 20 at 15:25 bobble 6,752

6

votes

2

answers

249

views

Pandigital fraction sum that evaluates to 1

mathematics alphametic

modified Jan 20 at 10:57 Cephalopod 444

7

votes

2

answers

245

views

Black board attack

chess construction

modified yesterday Rewan Demontay 6,967

6

votes

1

answer

169

views

I got [prefix] [suffix] [infix] from washing the [whole]

riddle affix-riddle

answered 2 days ago Stiv 60.5k

11

votes

2

answers

149

views

An artistic trip

knowledge enigmatic-puzzle geography

modified 2 days ago Arturo Vial Arqueros 539

9

votes

1

answer

193

views

A Fractal Sudoku - SS#13

logical-deduction grid-deduction sudoku

answered yesterday samm82 1,589

7

votes

1

answer

173

views

Three to Seven in five or less

no-computers word-ladder

answered Jan 19 at 15:26 kristinalustig♦ 2,922

10

votes

1

answer

102

views

A full cryptic crossword

cryptic-crosswords

modified 2 days ago Jeremy Dover 16.9k

6

votes

1

answer

143

views

Cutting a shape into two equal area shapes

mathematics geometry dissection

modified 23 hours ago Paul Panzer 8,892

11

votes

1

answer

91

views

This Sudoku Park iS LIT!

logical-deduction visual grid-deduction sudoku polyomino

modified 1 hour ago samm82 1,589

6

votes

1

answer

147

views

Logic grid puzzle - Carson City Chronicle

logical-deduction logic-grid

modified yesterday hexomino 105k

1

vote

2

answers

138

views

How to solve this 3x3 dots and lines puzzle?

visual progressive-matrix

modified yesterday Smartest1here 1,770

1

vote

1

answer

110

views

How many 𝑛-digit integers have the property that the block of its first 𝑘 digits is a prime or divisible by 𝑘 for all 1 ≤ 𝑘 ≤ 𝑛?

mathematics

answered Jan 20 at 0:55 Bubbler 7,666

-2

votes

1

answer

87

views

Heptagon, nonagon

mathematics geometry

modified 20 hours ago bobble 6,752

0

votes

3

answers

79

views

5x5 grid with no tetrominoes containing repeating colors

mathematics combinatorics polyomino

modified yesterday bobble 6,752

3

votes

2

answers

76

views

A triangle inside a triangle

mathematics geometry

modified Jan 20 at 21:05 Rand al'Thor 108k

4

votes

1

answer

123

views

What is this puzzle with identical wooden pieces?

puzzle-identification mechanical-puzzles burr-puzzle

modified yesterday Beth Music 43

7

votes

1

answer

87

views

This Sudoku takes a step up! - SS#11

logical-deduction grid-deduction sudoku

answered Jan 20 at 18:11 samm82 1,589

-3

votes

1

answer

226

views

Gold coins robbery [closed]

mathematics optimization

modified 2 days ago Jaap Scherphuis 33.5k

2

votes

2

answers

82

views

A number built with two-digit primes

mathematics optimization primes

modified 2 days ago RobPratt 4,112

0

votes

1

answer

91

views

10X10 Sudoku with a specific requirement

sudoku construction

modified 2 days ago bobble 6,752

0

votes

1

answer

65

views

Why is 'logjam' the answer to 'function held up by traffic blockage'?

wordplay crossword-clues explanation

modified 6 hours ago bobble 6,752

Top Questions

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.