Newest Questions
30,136 questions
3
votes
1
answer
368
views
Arrows Escaping a Figure of Identical Disks [closed]
Six identical disks are arranged in such a way that each disk is tangent to four perpendicular disks. The disks on opposite sides are parallel, and not parallel to any other disks. So, you could say ...
- 58k
6
votes
0
answers
174
views
Blue Discs, Red Discs and Happy Stars
What famous song is encoded by the following image?
BONUS QUESTION: What is the significance of the happy star in the top row?
- 8,376
10
votes
2
answers
724
views
Are cycles possible in the game Cation?
I'd like to know if cycles (infinite loops) are possible in this game:
Cation is a connection game for two players: Black and White. It is played on the intersections (points) of an initially empty ...
- 457
-5
votes
5
answers
522
views
Geometric Logic Puzzle: A Test of Cognitive Shift (The "Zocchi Test") [closed]
I have designed a visual logic puzzle that focuses on pattern recognition and cognitive flexibility. I would like to share it here for a two-fold purpose: to see how the community approaches the ...
13
votes
1
answer
909
views
Rulers, bots, cards, spots. Which country am I from?
This is an intentionally easy puzzle. To encourage new users to participate, please refrain from answering this puzzle if you have more than 200 reputation points (i.e. the level to get the ...
- 16.4k
1
vote
1
answer
207
views
Does 24 divide this product of four consecutive arithmetic factors? [closed]
Let $ \ n \ $ be a positive integer and let $ \ p \ $ be a prime number greater than or equal to $ \ 5. \ $
Show that $ \ 24 \ $ divides $ \ n(n + p)(n + 2p)(n + 3p).$
- 2,664
7
votes
2
answers
597
views
Arranging squares on a cube in isometric view
The image below shows the isometric view of six unit squares in 3D space. In particular, the squares are all aligned with the coordinate axes and parallel to the coordinate planes, but we do not have ...
- 28.6k
0
votes
0
answers
198
views
Can you find the 7 letter triple-encrypted English word?
I have created a custom encryption where the same 7-letter English word is represented in three different ways. No external "Key" is used, but the logic evolves in each version.
Here are the ...
- 79
26
votes
1
answer
712
views
Double Distilled Word
I've discovered a way to distill words. First I choose a small batch of fermentable words, and put them together into a sort of word mash. It's important to get this part right, so I check the words ...
- 2,532
21
votes
1
answer
1k
views
Glazed softly (not hard)
Why is it glazed like this? (The answer to that is to be found in the image).
- 58k
14
votes
2
answers
681
views
Ms. Geo's Greenhouse
Tucked away in a nearby neighborhood is a small, but popular, florist's shop, run by a charming young lady known only as Ms. Geo. I visited her store for the first time about a month ago, hoping to ...
- 21.6k
8
votes
4
answers
691
views
Six-Variable Logic Puzzle - How to solve with a forced logical path
Six variables 𝐴, 𝐵, 𝐶, 𝐷, 𝐸, 𝐹 are distinct integers from 1 to 10 (inclusive).
They satisfy the following conditions:
𝐴 × 𝐵 = 24
𝐵 is adjacent to 𝐹 → |B-F| = 1
𝐸 − 𝐷 = 3
𝐶 is the ...
- 491
17
votes
3
answers
1k
views
Pascal's Triangle !
On Pascal's triangle, draw an exclamation mark consisting of a rhombus with top vertex at the top of the triangle, and a square around the first number directly below the rhombus. Example:
Show that ...
- 6,564
11
votes
4
answers
1k
views
For Pi Day, which expression is larger?
Without using the square root key or other root key on a calculator,
determine which side is larger.
$\pi \ \ \ \text{or} \ \ \ \sqrt{63} - \sqrt{23}$
You may use the squaring key $ \ X^2, \ $ ...
- 2,664
7
votes
0
answers
589
views
One secret word encoded in three different ways
Challenge: One secret word encoded in three different levels.
Context: I created this challenge myself. I have encoded a single word using three different methods (three levels of encoding). All three ...
- 79