User klm123

61 votes

8 answers

6k views

Find a straight tunnel

asked Apr 13, 2015 at 16:22

60 votes

3 answers

291k views

What is the number of the parking spot?

asked Jun 26, 2014 at 22:25

31 votes

5 answers

6k views

Two spies throwing stones into a river

asked Jun 8, 2014 at 7:39

26 votes

6 answers

30k views

The 10,958 Problem

asked Apr 19, 2017 at 8:38

25 votes

3 answers

19k views

Write twenty-four from four numbers

asked Jun 7, 2014 at 15:35

25 votes

8 answers

4k views

How to choose at least half of everything

asked Oct 29, 2014 at 9:12

21 votes

5 answers

10k views

Help me to find a small but hard and clever maze

asked Jan 11, 2017 at 15:33

19 votes

11 answers

15k views

Knight, Knave and Joker puzzle

asked Oct 4, 2014 at 15:09

18 votes

2 answers

2k views

How to create a pure mathematical-logical based puzzle equivalent to resistance based physical puzzle?

asked Jun 4, 2014 at 11:04

18 votes

3 answers

4k views

Knights and jokers

asked Jun 5, 2014 at 13:24

17 votes

5 answers

1k views

Universal dissection

asked Jan 29, 2017 at 21:15

17 votes

2 answers

829 views

Are you more clever than Alice?

asked Apr 10, 2016 at 10:33

16 votes

4 answers

38k views

How to solve this IQ test puzzle with arrows and pied squares?

asked Jun 10, 2014 at 19:57

14 votes

5 answers

3k views

What is the smallest positive integer, which can not be written without repetitions of digits and using arithmetics only?

asked Jul 3, 2014 at 14:26

14 votes

3 answers

727 views

Strategy to beat the Casino reversed

asked May 10, 2018 at 15:49

14 votes

7 answers

9k views

IQ-test-type question - sequence of large triangles with black and white small triangles in them

asked Apr 26, 2015 at 14:32

13 votes

2 answers

1k views

Let's deal with "Names in Boxes" Safely

asked Oct 18, 2015 at 12:35

13 votes

7 answers

3k views

The smallest crossword

asked Jun 17, 2014 at 7:10

13 votes

7 answers

3k views

Fastest way to collect an arbitrary army

asked Jun 1, 2014 at 18:00

11 votes

1 answer

759 views

Find the color of the chess pieces

asked Jun 6, 2014 at 8:29

11 votes

1 answer

4k views

How to solve this crazy Chinese puzzle for children?

asked Jun 10, 2014 at 20:11

11 votes

2 answers

740 views

First number, which can not be defined

asked Jul 31, 2014 at 15:27

11 votes

2 answers

484 views

From knights to kings

asked Oct 27, 2014 at 11:38

10 votes

3 answers

6k views

Mirrored numbers

asked Aug 10, 2014 at 13:36

10 votes

2 answers

809 views

Middle weight puzzle

asked Jul 15, 2014 at 10:17

10 votes

2 answers

984 views

Is there a retrograde analysis puzzle like "Point on the incorrectly drawn chess piece"?

asked Jun 4, 2014 at 10:05

9 votes

2 answers

886 views

How to generalise hang picture puzzle?

asked Jun 12, 2014 at 12:02

8 votes

1 answer

633 views

Find the smallest N to complete the task: "Write a true self-reflective statement about the digits from 0 to N"

asked Jul 12, 2014 at 7:25

8 votes

4 answers

1k views

How to lock a shared artefact

asked Jun 13, 2014 at 21:18

8 votes

1 answer

937 views

Number of tries to guess M-1 letters from M-letters-code

asked Jun 14, 2014 at 11:57

Stack Exchange Network

74 Questions

Find a straight tunnel

What is the number of the parking spot?

Two spies throwing stones into a river

The 10,958 Problem

Write twenty-four from four numbers

How to choose at least half of everything

Help me to find a small but hard and clever maze

Knight, Knave and Joker puzzle

How to create a pure mathematical-logical based puzzle equivalent to resistance based physical puzzle?

Knights and jokers

Universal dissection

Are you more clever than Alice?

How to solve this IQ test puzzle with arrows and pied squares?

What is the smallest positive integer, which can not be written without repetitions of digits and using arithmetics only?

Strategy to beat the Casino reversed

IQ-test-type question - sequence of large triangles with black and white small triangles in them

Let's deal with "Names in Boxes" Safely

The smallest crossword

Fastest way to collect an arbitrary army

Find the color of the chess pieces

How to solve this crazy Chinese puzzle for children?

First number, which can not be defined

From knights to kings

Mirrored numbers

Middle weight puzzle

Is there a retrograde analysis puzzle like "Point on the incorrectly drawn chess piece"?

How to generalise hang picture puzzle?

Find the smallest N to complete the task: "Write a true self-reflective statement about the digits from 0 to N"

How to lock a shared artefact

Number of tries to guess M-1 letters from M-letters-code