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klm123
  • Member for 8 years, 7 months
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59 votes
3 answers
279k views

What is the number of the parking spot?

57 votes
8 answers
5k views

Find a straight tunnel

30 votes
5 answers
6k views

Two spies throwing stones into a river

26 votes
6 answers
29k views

The 10,958 Problem

25 votes
8 answers
4k views

How to choose at least half of everything

23 votes
3 answers
18k views

Write twenty-four from four numbers

21 votes
5 answers
7k views

Help me to find a small but hard and clever maze

18 votes
2 answers
2k views

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

18 votes
3 answers
3k views

Knights and jokers

18 votes
11 answers
14k views

Knight, Knave and Joker puzzle

17 votes
4 answers
36k views

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

17 votes
5 answers
1k views

Universal dissection

16 votes
2 answers
811 views

Are you more clever than Alice?

14 votes
7 answers
8k views

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

14 votes
7 answers
3k views

The smallest crossword

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?

14 votes
3 answers
658 views

Strategy to beat the Casino reversed

13 votes
7 answers
3k views

Fastest way to collect an arbitrary army

12 votes
2 answers
1k views

Let's deal with "Names in Boxes" Safely

11 votes
2 answers
476 views

From knights to kings

11 votes
1 answer
745 views

Find the color of the chess pieces

11 votes
1 answer
4k views

How to solve this crazy Chinese puzzle for children?

11 votes
2 answers
733 views

First number, which can not be defined

10 votes
3 answers
6k views

Mirrored numbers

10 votes
1 answer
868 views

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

9 votes
2 answers
769 views

Middle weight puzzle

9 votes
2 answers
847 views

How to generalise hang picture puzzle?

8 votes
4 answers
1k views

How to lock a shared artefact

8 votes
1 answer
928 views

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

8 votes
3 answers
414 views

Find a straight tunnel 2