unfolded cube puzzle

wintersolstice · 2010-07-24 04:25:47

I didn't know the best place to post this,

I don't understand the puzzle, I know what you've got to do: colour the cube in correctly using the two colours given, but I don't understand what the "see through" cube is or how that helps you. I do find things difficult to understand sometimes (I thought I had understood at some point but when I solved it using what I understood my answer was completely wrong) the instructions just don't seem to be complete enough

can anyone help?

bobbym · 2010-07-24 04:38:59

Hi wintersolstice;

I can't see any drawing or page. Post the problem and the diagram, if you can.

wintersolstice · 2010-07-24 05:33:59

bobbym wrote:

Hi wintersolstice;
I can't see any drawing or page. Post the problem and the diagram, if you can.

here:

http://www.mathsisfun.com/games/unfolded-cube-puzzle.html

I don't understand what the "unfolded cube" tells you about the final cube

bobbym · 2010-07-24 05:47:21

Hi wintersolstice;

Got me too. Appears to be a nice game though!

Bob · 2010-07-28 23:42:14

The real 27 cubes have some blue and some clear cubes. The left hand diagram doesn't show you what the faces are like but rather how many cubes in a given line are blue and how many are clear.

As you look at a face you might be looking at blue cube that has another blue cube behind and another blue cube behind that. The left hand view indicates this by showing a deep blue square.

Or you might be looking at a cube that is clear, with a blue behind and another blue behind that. This is shown on the left hand view by a mid blue square.

Or you might be looking at a clear, with a clear behind with a blue behind that. This is shown on the left hand view by a light blue square.

And so on.

So the left hand view doesn't show the outer faces; it shows whether there are three, two, one or no blue cubes in that line. Altogether this gives 6 x 9 bits of information about which cubes are blue and which are clear.

So work this out and show what the outer faces look like on the right hand diagram.

I hope this makes sense to you.

I've just re-read it; and I'm not even sure it makes sense to me! So I've made a revised left hand diasgram in which the numbers tell you how many blue cubes there are 'in that line'. Hope that helps.:cool:

Bob

Last edited by Bob (2010-07-28 23:57:31)

Bob · 2010-07-29 06:48:15

Whoops. "Altogether this gives 6 x 9 bits of information about which cubes are blue and which are clear."

Obviously, I meant 3 x 9 since opposite 'faces' have the same information.

Embarrassed smily begs forgiveness.

Math Is Fun Forum

#1 2010-07-24 04:25:47

unfolded cube puzzle

#2 2010-07-24 04:38:59

Re: unfolded cube puzzle

#3 2010-07-24 05:33:59

Re: unfolded cube puzzle

#4 2010-07-24 05:47:21

Re: unfolded cube puzzle

#5 2010-07-28 23:42:14

Re: unfolded cube puzzle

#6 2010-07-29 06:48:15

Re: unfolded cube puzzle

Board footer