Skip to main content

Top Questions

15 votes
3 answers
4k views

Make exactly 101 squares using as few lines as possible

40 votes
1 answer
3k views

Footprints in the Snow

14 votes
3 answers
3k views

Is this puzzle solvable? Choose 6 five-letter words to get maximum score

10 votes
2 answers
2k views

IQ test question with boxes above and below a line

13 votes
4 answers
2k views

Can you color the 8x8 grid red and blue?

18 votes
4 answers
2k views

Catching a Cat on an infinite Line

17 votes
3 answers
1k views

Finding a mystery number from a sum and product, with a twist

8 votes
3 answers
3k views

Split a number in half, sum it, square it and get the number back

26 votes
3 answers
1k views

Leaders and Rulers

27 votes
1 answer
2k views

tnih neddih eht kcehc

20 votes
3 answers
1k views

Keys and Locks Puzzle

27 votes
1 answer
2k views

Can you "spot" the pattern?

12 votes
5 answers
2k views

Unpaired socks in my lap

31 votes
1 answer
1k views

Do they even fit? Yes!

16 votes
2 answers
1k views

Going around in circles

18 votes
2 answers
1k views

Nonconsecutive Anti-Knight Fillomino?

19 votes
2 answers
795 views

Need some help with my math homework (pretty please?)

18 votes
1 answer
2k views

I don't belong in this list!

23 votes
2 answers
2k views

I am international anyway

26 votes
1 answer
793 views

A Colorful explosion

19 votes
2 answers
2k views

What is the maximum number of fish possible in your tank?

20 votes
2 answers
724 views

Torus Flow Free

10 votes
2 answers
1k views

Cryptic Clue Explanation: Tree that's sported to keep visitors out at university (3)

14 votes
2 answers
1k views

The Ultimate Battle of two players

12 votes
5 answers
2k views

How fast can you win this (very stupid) game?

21 votes
2 answers
632 views

3³+4³+5³=6³ Puzzle

8 votes
3 answers
829 views

Visiting every digit

8 votes
3 answers
1k views

Largest sequence of adjacent numbers less than 11 such that adjacent number divides the other

16 votes
1 answer
2k views

What's the one digit you can fill in this partially hidden Sudoku?

9 votes
4 answers
1k views

Prisoners and warden game, again?

19 votes
1 answer
1k views

LTCGY - Let the corners guide you

26 votes
1 answer
754 views

What is a Kebab Word™?

14 votes
1 answer
1k views

What was the title and author of this children's book of mazes?

22 votes
1 answer
1k views

A Crossworm Puzzle

15 votes
1 answer
792 views

Top Five As Flags

11 votes
2 answers
1k views

Today is a prime!

11 votes
4 answers
533 views

The Bogotá Marathon

17 votes
1 answer
1k views

66: Luftballons

15 votes
1 answer
592 views

Motion in the Ocean

16 votes
1 answer
1k views

Can White still castle? #2

3 votes
6 answers
1k views

3 doors guarded by 1 knight and 2 knaves

14 votes
1 answer
464 views

Parts of Humans

5 votes
3 answers
265 views

Make a Venn diagram with five triangles

11 votes
3 answers
426 views

Guess the Permutation

7 votes
1 answer
828 views

More Catching of Cats

10 votes
1 answer
596 views

Semme a Cardiff you go there!

10 votes
1 answer
598 views

Adam Smith and David Hume

10 votes
1 answer
539 views

Spectrum Analysis


Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.