Most Popular
1500 questions
55
votes
2 answers
My Spying Girlfriend
I need your help again. My girlfriend Ada now has a job at a spy agency and there's a... situation.
Ada's boss called her into his office this morning. He was holding a weird tube with a button in the middle.
It seems that it was a prototype…
Hugh Meyers
- 23,712
- 1
- 52
- 171
55
votes
8 answers
The Cucumber Paradox
Suppose you have 100 lbs of cucumbers and these cucumbers consist of 99% water. You decide to leave the cucumbers in the sun for a while until they consist of 98% water. You bring the cucumbers back in, and you think, "Now the cucumbers should weigh…
NL628
- 7,490
- 3
- 34
- 77
55
votes
1 answer
Japanese Fusion Alphabet Soup
The Dish...
...is an intriguing blend, with a base of classic Western flavours, and a twist of the Orient at its heart.
The Ingredients...
...are diverse and are combined in such an unexpected - dare I say, cryptic - way that the true nature of…
Alconja
- 37,250
- 16
- 116
- 164
55
votes
1 answer
Grandma likes coffee but not tea
Note: My grandma is a little odd. She only likes certain things. Solve this puzzle by providing phrases that are true. For example: Grandma likes A but not B
Grandma likes coffee but not tea.
Grandma likes fall but not autumn.
Grandma likes…
Kevin Rock
- 1,463
- 1
- 13
- 24
55
votes
1 answer
Mithrandir has lost his keys!
Announcement: All puzzles are being delayed because my Puzzling notebook with all of my keys disappeared. :/ -- Mithrandir
Some hours after discovering this devastating loss, Mithrandir went to bed. Still moping over his missing notebook, he…
Rand al'Thor
- 116,845
- 28
- 322
- 627
55
votes
1 answer
What is the next shape?
which one is the correct answer of the following picture? What is the algorithm of shapes sequence?
Rafe
- 5,756
- 4
- 29
- 51
55
votes
6 answers
Can you explain these equations?
Anthony just got a new drone with an HD camera and microphone, and he is eager to test it out. He connects his computer to its wireless live video stream, opens up his window, and flies it outside. On the video stream, Anthony can see his…
pacoverflow
- 15,204
- 2
- 55
- 94
55
votes
4 answers
An Easy Mate In 1
As stated in the title, white must mate black in 1 move. But first you must solve the mystery behind this puzzle.
This puzzle was created by Hieronymus Fischer (1843-1927).
Sleafar
- 18,027
- 1
- 45
- 101
55
votes
1 answer
Unsolved Mysteries: D'Agapeyeff cipher
The D'Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of "Codes and Ciphers", an elementary book on cryptography published by the cryptographer Alexander D'Agapeyeff in 1939:
75628 28591 62916 48164 91748 58464 74748…
pacosta
- 691
- 5
- 6
55
votes
16 answers
Join all circles together only with 6 lines
In the below image, can you draw 6 straight lines that pass all the circles?
As soon as you start drawing lines you can't take your pen up until you draw all six lines.
hint: you don't have to keep the polyline inside the square.
Edit:
Best answer…
Masoud Mohammadi
- 1,084
- 1
- 9
- 22
55
votes
2 answers
The Madman's Speech
You are walking through the prairie when you find a madman wandering around talking to himself. The following is what you manage to hear of his speech:
"How? I - I'll ask her. I owe her much, again. I'd a home on town, a tax as florid as out the…
Rand al'Thor
- 116,845
- 28
- 322
- 627
55
votes
4 answers
A maze puzzle for the day
Here's a little maze puzzle I originally built a couple of years ago, that seems apropos to reprise now:
Can you make it from the A in the top left of this grid to the Z in the bottom right, always going either up one letter (for instance, A to B or…
Steven Stadnicki
- 2,491
- 15
- 28
55
votes
1 answer
After the funeral
The mood was sombre in the lawyer’s office. Eight members of the Picodie family gathered together to hear the reading of their recently deceased father’s will. Around the table sat Eli, Ron, Agnes, Tim, Toni, Eric and Levi, while their oldest…
Stiv
- 140,467
- 11
- 495
- 752
54
votes
9 answers
Shady business in the local paper
I work as a delivery man for our local newspaper and noticed something that has my alarm bells ringing. The embassy of Warfaretania has ordered exactly nine issues of our paper, from December 1 through December 9. While it's possible that the…
Jafe
- 78,615
- 8
- 162
- 614
54
votes
3 answers
A 16 Clue Sudoku Puzzle (but the kings can't be in check)
An entry in the 19th fortnightly challenge...
Above is a 9x9 "chess" board with some pieces already laid out, your goal is to fill the board completely, following standard Sudoku rules (i.e. every cell should be filled, such that a specific piece…
Alconja
- 37,250
- 16
- 116
- 164