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Top Questions

12 votes
3 answers
1k views

Interesting irrational number

26 votes
2 answers
3k views

The world's smallest square maze?

21 votes
2 answers
2k views

Can you find a 3x3 white square somewhere in this relatively prime graph?

21 votes
1 answer
3k views

Behaviorists hate this trick

14 votes
2 answers
1k views

Very small regional Yajilin

15 votes
2 answers
772 views

A Trivial Pursuit #10 (Art and Literature 2/4): Bookshelf

9 votes
3 answers
1k views

What kind of puzzle is this?

5 votes
4 answers
320 views

frog on a number line

6 votes
5 answers
402 views

Minimum K for detecting fake pearls in one weighing

10 votes
1 answer
305 views

Reducing π to zero (again)

13 votes
1 answer
758 views

A Trivial Pursuit #09 (History 2/4): Windows 7

1 vote
2 answers
949 views

16 queens puzzle

3 votes
3 answers
306 views

Numbers that are averages of their digits

15 votes
1 answer
380 views

Regional Business

7 votes
1 answer
792 views

Before the Common Era

12 votes
2 answers
317 views

Build-an-Animal Workshop

7 votes
1 answer
420 views

Comprised of both

6 votes
1 answer
658 views

A simple 5x5 crossword

3 votes
1 answer
201 views

Genius Belt; What am I?

4 votes
1 answer
644 views

Don't let 'em die!

4 votes
1 answer
285 views

Continue the Pattern #7

4 votes
2 answers
245 views

Waffleing my Egg

4 votes
1 answer
285 views

Nonogram with story

5 votes
1 answer
281 views

Permutations with given longest increasing subsequence

1 vote
1 answer
164 views

How many 4x4 Latin Squares are there?

1 vote
1 answer
176 views

What is the next term in the sequence 3, 1, -7, 41?

7 votes
1 answer
79 views

Find the best play on each board

1 vote
2 answers
132 views

Logic and Geometry Problem #5: does Savage Go have cycles?

3 votes
1 answer
168 views

"Pawn Placement" - a GCHQ word association puzzle (video game edition)

1 vote
1 answer
128 views

Cheese from Denmark

2 votes
2 answers
173 views

Chess 960 and Castling #2

2 votes
0 answers
170 views

Futuristic navigation

-2 votes
1 answer
130 views

Golden Ape Peculiarity

2 votes
2 answers
98 views

Chess 960 and Castling #1

3 votes
0 answers
155 views

What does my wife want (again)?

0 votes
0 answers
146 views

Can't overthink my daunting, challenging ask

0 votes
1 answer
127 views

Next term in sequence

1 vote
2 answers
125 views

Two Sheriffs and Eavesdroppers - 3

0 votes
2 answers
96 views

Progressive matrix: lines of spades with different orientations

3 votes
0 answers
122 views

A three-stage puzzle

2 votes
0 answers
99 views

The Mono-Quantum Condrum

1 vote
1 answer
122 views

Good cipher with a "password"?

4 votes
0 answers
89 views

Continue the squence of hexagons

2 votes
0 answers
89 views

What is in the middle?

1 vote
0 answers
68 views

Can you find the missing letters?

1 vote
1 answer
63 views

How can I visualize the Mastermorphix 3x3 modification?


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