User klm123

6 votes

3 answers

1k views

Is there a brute-force solution of this puzzle?

asked Jun 10, 2014 at 5:49

10 votes

2 answers

985 views

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

asked Jun 4, 2014 at 10:05

5 votes

1 answer

564 views

How to control the whole board with 8 standard pieces?

asked Sep 4, 2014 at 6:36

25 votes

3 answers

19k views

Write twenty-four from four numbers

asked Jun 7, 2014 at 15:35

60 votes

3 answers

291k views

What is the number of the parking spot?

asked Jun 26, 2014 at 22:25

7 votes

3 answers

1k views

How many digits can be removed from a division puzzle?

asked Jun 15, 2014 at 19:03

6 votes

1 answer

12k views

Maximal number of steps needed to solve 2x2x2 Rubik's Cube

asked Jun 11, 2014 at 21:27

6 votes

2 answers

2k views

What is the smallest tic-tac-toe board to have a winning strategy?

asked Jun 20, 2014 at 19:22

7 votes

3 answers

442 views

Proving by weighting

asked Mar 3, 2021 at 20:19

61 votes

8 answers

6k views

Find a straight tunnel

asked Apr 13, 2015 at 16:22

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

8 votes

2 answers

495 views

Modifying the puzzle: Cooperative hat-guessing, no mistakes, 3+ colors

asked Jul 20, 2020 at 15:02

8 votes

3 answers

764 views

Guess your hat color, but you don't have to

asked Jul 16, 2020 at 16:13

17 votes

5 answers

1k views

Universal dissection

asked Jan 29, 2017 at 21:15

4 votes

1 answer

455 views

Minimising information to guess all hats correctly

asked Sep 2, 2017 at 8:45

31 votes

5 answers

6k views

Two spies throwing stones into a river

asked Jun 8, 2014 at 7:39

25 votes

8 answers

4k views

How to choose at least half of everything

asked Oct 29, 2014 at 9:12

2 votes

2 answers

560 views

T Knights, L Knaves and R Jokers

asked Oct 21, 2014 at 10:02

17 votes

2 answers

829 views

Are you more clever than Alice?

asked Apr 10, 2016 at 10:33

14 votes

3 answers

727 views

Strategy to beat the Casino reversed

asked May 10, 2018 at 15:49

13 votes

2 answers

1k views

Let's deal with "Names in Boxes" Safely

asked Oct 18, 2015 at 12:35

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

26 votes

6 answers

30k views

The 10,958 Problem

asked Apr 19, 2017 at 8:38

19 votes

11 answers

15k views

Knight, Knave and Joker puzzle

asked Oct 4, 2014 at 15:09

0 votes

2 answers

881 views

Unlimited paper folding

asked Aug 4, 2017 at 5:38

4 votes

3 answers

15k views

Task 39 from iqtest.dk

asked Jul 5, 2014 at 18:16

10 votes

3 answers

6k views

Mirrored numbers

asked Aug 10, 2014 at 13:36

7 votes

3 answers

2k views

Create a changeable maze

asked Jun 23, 2017 at 7:43

9 votes

2 answers

886 views

How to generalise hang picture puzzle?

asked Jun 12, 2014 at 12:02

6 votes

4 answers

9k views

What is the pattern in this IQ test puzzle with spotted triangles and arrowed circles?

asked Jul 5, 2014 at 17:37

Stack Exchange Network

74 Questions

Is there a brute-force solution of this puzzle?

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

How to control the whole board with 8 standard pieces?

Write twenty-four from four numbers

What is the number of the parking spot?

How many digits can be removed from a division puzzle?

Maximal number of steps needed to solve 2x2x2 Rubik's Cube

What is the smallest tic-tac-toe board to have a winning strategy?

Proving by weighting

Find a straight tunnel

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

Modifying the puzzle: Cooperative hat-guessing, no mistakes, 3+ colors

Guess your hat color, but you don't have to

Universal dissection

Minimising information to guess all hats correctly

Two spies throwing stones into a river

How to choose at least half of everything

T Knights, L Knaves and R Jokers

Are you more clever than Alice?

Strategy to beat the Casino reversed

Let's deal with "Names in Boxes" Safely

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

The 10,958 Problem

Knight, Knave and Joker puzzle

Unlimited paper folding

Task 39 from iqtest.dk

Mirrored numbers

Create a changeable maze

How to generalise hang picture puzzle?

What is the pattern in this IQ test puzzle with spotted triangles and arrowed circles?