Questions tagged [topology]
A puzzle about disentangling knots, folding paper, separating strings and wires, and understanding the connectivity properties of elastic figures. General topology questions are off-topic but can be asked on Mathematics Stack Exchange.
38
questions
7
votes
1
answer
319
views
wandering knight
Suppose a land with a finite number of castles. Each castle is connected (via roads) with exactly 3 other castles.
One knight leaves from his castle and starts travelling. He moves in the following ...
2
votes
2
answers
164
views
Some puzzles just appear while doing diy [closed]
I had fitted a camera above the built-in wardrobe in our children's room. There was a socket behind the drawers. I could just remove the drawer to plug it in, but there was only enough room to slide ...
- 123
5
votes
1
answer
158
views
The grandest zoo in Appelhaken
In the magnificent country of Appelhaken there is a zoo. Not just any zoo, but a grand zoo, a magnificent zoo, called Appelhaken Grand Magnificent Magnificent Grand Grand Zoo.
In this zoo there are ...
- 5,364
8
votes
1
answer
198
views
The grandest bridge in Appelhaken [duplicate]
In the capital of the grand country of Appelhaken there is a plane garden containing four magnificent monuments. So magnificent are they that the country has a Law requiring that there must be a ...
- 5,364
8
votes
4
answers
2k
views
How to use a Mobius strip for puzzle creation? [closed]
A Mobius strip is one of the basic concepts of topology. There are many interesting tricks using this strip (for example, interesting results of cutting the tape with a different number of turns). ...
- 1,701
0
votes
4
answers
1k
views
Is the following topology puzzle impossible to solve? [duplicate]
There was a problem I was introduced to in grade school which my teacher claimed that not even his graduate level students could solve, and it went a little like this. You have a set of boxes in a ...
- 552
10
votes
0
answers
2k
views
3D ring/rope wooden puzzle solution?
I have a Eureka 3d "Puzzle G":*
The box lists 3 puzzles:
Remove the ring
Remove the rope
Move the ring to the other side
While I was able to solve shows the first puzzle, I haven't ...
- 406
40
votes
6
answers
5k
views
Changing baby's shirt
Baby needs a change of shirt, but baby is also sucking on a bottle (see this stock photo for a visual). If the bottle leaves baby's mouth, baby will start crying. Also, baby loves holding the ...
- 9,564
18
votes
6
answers
2k
views
Turning My Pants Inside-Out
A 12-foot long rope has two ends. One end of the rope is tied around a man's left ankle and the other end is tied around the man's right ankle.
If you are not allowed to untie the rope and you're ...
- 7,490
7
votes
2
answers
376
views
Teacup geometry
Inspired by the three utilities puzzle from prog_SAHIL I'm now posting a similar puzzle that makes use of the topology of a cup with a handle:
The question is:
How many distinct points can you ...
- 5,948
10
votes
2
answers
3k
views
The three utilities puzzle
Here is a variant of the three utilities puzzle.
Famously, It is impossible to solve it on a plane paper (Euler's theorem can prove that). But can you solve it on a coffee mug?
...
- 5,363
6
votes
2
answers
264
views
18
votes
11
answers
8k
views
IQ Test Example
I'm reading up on various IQ tests, and a slideshow that I stumbled upon gave the following example:
This doesn't make sense to me, as none of the options duplicate the conditions in the far left ...
- 961
-1
votes
2
answers
207
views
Ant-Man in chains [closed]
"Ant-Man" is a superhero that can change his size. Usually he can get very small, but sometimes he can get large as well. In the movie 'Ant-Man' (minor spoiler here) there is a scene where he is ...
- 1,952
0
votes
2
answers
184
views
Pulling strings...not legs?
What happens to the two strings - of the logo of G20 Summit (currently happening in Germany)-if pulled either side (in opposite directions, away from the center) at the same time ?
Your options are:...
- 8,636