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klm123
  • Member for 9 years, 11 months
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5 votes
1 answer
560 views

How to control the whole board with 8 standard pieces?

25 votes
3 answers
19k views

Write twenty-four from four numbers

60 votes
3 answers
289k views

What is the number of the parking spot?

7 votes
3 answers
1k views

How many digits can be removed from a division puzzle?

6 votes
1 answer
12k views

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

6 votes
2 answers
2k views

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

7 votes
3 answers
436 views

Proving by weighting

58 votes
8 answers
6k views

Find a straight tunnel

14 votes
7 answers
8k views

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

8 votes
2 answers
484 views

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

8 votes
3 answers
719 views

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

17 votes
5 answers
1k views

Universal dissection

4 votes
1 answer
447 views

Minimising information to guess all hats correctly

31 votes
5 answers
6k views

Two spies throwing stones into a river

25 votes
8 answers
4k views

How to choose at least half of everything

2 votes
2 answers
554 views

T Knights, L Knaves and R Jokers

17 votes
2 answers
824 views

Are you more clever than Alice?

14 votes
3 answers
717 views

Strategy to beat the Casino reversed

13 votes
2 answers
1k views

Let's deal with "Names in Boxes" Safely

18 votes
2 answers
2k views

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

26 votes
6 answers
30k views

The 10,958 Problem

19 votes
11 answers
15k views

Knight, Knave and Joker puzzle

0 votes
2 answers
874 views

Unlimited paper folding

4 votes
3 answers
15k views

Task 39 from iqtest.dk

10 votes
3 answers
6k views

Mirrored numbers

7 votes
3 answers
2k views

Create a changeable maze

9 votes
2 answers
878 views

How to generalise hang picture puzzle?

6 votes
4 answers
9k views

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

16 votes
4 answers
38k views

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

2 votes
1 answer
170 views

How to improve "Universal dissection"?