3 year old solves rubic's cube.

[nihilistic]

I hope you are allowed a peek before you are blindfolded?
Otherwise, you really need to be very good

Of course you are allowed to look at the initial condition before hand. Otherwise how would the know if it is solved or how to proceed?

For the last step you'll need the algorithm that switches around only 2 edge pieces, which is quite complicated to learn. Although you can solve it with the one you are talking about, but only if you are lucky.

I find that doing the corners before the edges and positions before orientations is better than the other way around. Also, you can't switch only 2 edge pieces' positions.

 

[Synobun]

The cube is probably set, so all the girl needs is to follow the instructions she got. Twist left there, twist up there...

 

[Urederra]

I find that doing the corners before the edges and positions before orientations is better than the other way around. Also, you can't switch only 2 edge pieces' positions.

You are right, I mixed up corners and edges.

 

[Azash]

I remember my mom gave me a rubic's cube and mixed it up when I was 5 years old and made some suggestion that I should give it a try-An hour later I gave it back to her and finished it by simply taking the colour stickers and re-arranged them into their original place.

Beat that you math nerds!

The world record is 10ish seconds

 

[nivi]

The world record is 10ish seconds

And even the slowest person with arthritis could take the stickers and put them in order in less then an hour.

 

[Brighteye]

Did the child work out how to solve it on its own? Or was it taught by rote?

I've seen 6-year olds very proudly amaze me with their ability to solve the rubic's cube, not realising that I know that you can look up a few simple rules on the internet and follow them to do pretty much any cube in a minute.

A 3-year old doing it probably requires some parental help. Unless the 3-year old worked out the rules, which is more impressive.

 

[Phlegmak]

Here's another 3 year old doing it.

http://www.youtube.com/watch?v=ghtHP7TyAnE&mode=related&search=

 

[Azash]

And even the slowest person with arthritis could take the stickers and put them in order in less then an hour.

I was referring to "beat that nerds".

 

[Catharsis]

The cube is probably set, so all the girl needs is to follow the instructions she got. Twist left there, twist up there...

Are you saying this is Chinese propaganda?

I would never be able to solve a Rubik's Cube no matter how many algorithms you taught me. I can't envisage the third dimension. I have enough trouble with the second.

 

[Mise]

Here's another 3 year old doing it.

http://www.youtube.com/watch?v=ghtHP7TyAnE&mode=related&search=

Awwww she's so cute!

 

[nihilistic]

Here's another 3 year old doing it.

http://www.youtube.com/watch?v=ghtHP7TyAnE&mode=related&search=

That one is very convincing. She has a rough grasp of the algorithms involved (which is obviously more than incredible for a 3 year old), and does appear to apply it in an inexperienced way. To fake that performance (by either memory or reverse video) takes more effort than doing the real thing.

 

[Mise]

Did anyone ever used to do rubix cubes using pure logic, rather than algorithms? Where the algorithms invented by mathematical analysis, or by formalising the logical steps involved in solving them?

 

[nihilistic]

Did anyone ever used to do rubix cubes using pure logic, rather than algorithms? Where the algorithms invented by mathematical analysis, or by formalising the logical steps involved in solving them?

Pure logic? You'll probably want group theory. Rubik's Cube can be formalized and analyzed in group theory, but it is a complicated group. Most of the algorithms for the rubik's cube are found via trial and error, though a significant amount of those trials of the more sophisticated ones involve some knowledge of group theory. Of course all of those trial and error can be formalized.

 

[Azash]

Well, normally AFAIK people start out experimenting the first few solves. When you keep solving the cube, you'll start delving into the algorithms for some reason.

 

[b etor]

Aww man what a smart little kid. I didn't even know what one was when I was 3. I couldn't solve one till I was 8.
I love how the dude with the mic couldn't solve the 2x2 cube.

 

[Ansar]

Well, I'll be honest. I have no clue how to solve a rubic's cube.

This girl deserves a prize.