Originally published at: Simple solutions to Rubik's Cube | Boing Boing

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Solutions?

Those are not solutions, only some simple examples that literally **any** sequence of moves, repeated enough times, will give back a solved cube **if you start with one**.

A skilled solver might learn to recognise the intermediate combinations and finish solving by applying/undoing the rest of the sequence, but a full general solution they are not.

I’m not skilled, I solved it when I was in high school and it took me quite some time to find a solution.

Some days later a classmate and friend saw me solving the cube:

“Cool! How did you learn to do it?”

“Oh, I read a book”

“Can I borrow it?”

“Sure thing! It’s from the school library!”

The morning after he was extremely disappointed when I brought “Theorems and problems in group theory”.

The set of tiles plus the possible operations form what is called a group.

A very simple example of a group might be the numbers 0,1,2,3 as elements and addition modulo 4 as operation.

Applying the operation to elements in the group you always obtain an element in the group (E.g. 0 + 2 = 2, 2+3 = 1 etc.), there is an identity element (0, as *element* + 0 gives you *element*) and every element has an inverse:

3 and 1 are inverse of each other, as 3+1=0, and 2 and 0 are their own inverse ( 2 +2 = 0, 0 + 0 = 0).

From Indian, eh? Always wanted to go there.

I never could solve… just couldn’t make the spatial connections.

But I could tear one down and put it in a jar.

https://www.google.com/search?q=rubik's+cube+in+jar

Molten copper does the trick…

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