When is a cube hidden?

[Teeth12345]

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I consistently get cube questions wrong when they involve "hidden" cubes. I know that the instructions say that there are no hidden cubes unless they support other cubes. Then for this CRACK DAT problem, why are there 8 2-sided cubes? I tried my best to get a good picture of the problem. I placed my mouse sort of over the cube that I thought did not exist. It doesn't seem to support anything else so how come CRACK DAT treats it as a cube? (It's in the 5th column from the left). Thank you!

 

[seunglim87]

The cube that you are pointing at, i would say it has 3 faces shown.
i got 5faces-3 , 4 faces-4, 3 faces-10, 2 faces-7, 1face-3, 0face-0. is that correct answer? i just think that if there is no cube on top you can just assume there is no cube underneath unless you can see it.

 

[jonishere5]

I consistently get cube questions wrong when they involve "hidden" cubes. I know that the instructions say that there are no hidden cubes unless they support other cubes. Then for this CRACK DAT problem, why are there 8 2-sided cubes? I tried my best to get a good picture of the problem. I placed my mouse sort of over the cube that I thought did not exist. It doesn't seem to support anything else so how come CRACK DAT treats it as a cube? (It's in the 5th column from the left). Thank you!

That cube should not exist, CrackDAT sometimes has figures that are hard to tell if the cubes exist or not, I would come across problems like that (Floating cubes, invisible cubes, or cubes that shouldn't be there.) every once in awhile.

 

[dental13]

That cube should not exist, CrackDAT sometimes has figures that are hard to tell if the cubes exist or not, I would come across problems like that (Floating cubes, invisible cubes, or cubes that shouldn't be there.) every once in awhile.

Right lower side, the second row does not have cubes.
Therefore if you count in two sided cubes on the lower right side, you will have 8 2 sided cubes.
I hope this helps little.

First row, second and third column from the right. those two cubes are two sided since there arn't any cubes behind them.

 

[jonishere5]

here

 

[jonishere5]

1 side painted=2
2sides painted=6
3sides painted=11
4sides painted=4
5sides painted=3

 

[jonishere5]

Right lower side, the second row does not have cubes.
Therefore if you count in two sided cubes on the lower right side, you will have 8 2 sided cubes.
I hope this helps little.

First row, second and third column from the right. those two cubes are two sided since there arn't any cubes behind them.

Hmm I'm not seeing it, take a look at my pic I uploaded does that look correct?

The area were I labeled no cube you really can't tell if there is a cube there because the stack to the right is blocking the view, so due to that you should assume there is no cube there.

 

[Teeth12345]

ok, that's what I got too. I guess CRACK DAT is wrong? I just hope they don't pull something like this on the exam.

Thanks to everyone for their help!

1 side painted=2
2sides painted=6
3sides painted=11
4sides painted=4
5sides painted=3

 

[tendram]

I got 8. If you count the cube you are pointing out as having 3 faces showing then there are 8 cubes with 2 faces showing.

I highlighted the cubes with 2 faces in red (the hidden one is kind of hard to see though) and the cube in question in blue.



Plus that would be unfair to say that theres not a cube there when its not easily noticeable. Hope that helps 👍

 

[jonishere5]

I got 8. If you count the cube you are pointing out as having 3 faces showing then there are 8 cubes with 2 faces showing.

I highlighted the cubes with 2 faces in red (the hidden one is kind of hard to see though) and the cube in question in blue.



Plus that would be unfair to say that theres not a cube there when its not easily noticeable. Hope that helps 👍

Because that cube that you highlighted in blue is blocked off by the stack of 3 cubes you can't assume its there, if you could see the vertical line or horizontal line coming from the top left hand corner of the blue outlined cube then you could assume its there, but because its blocked off by the stack of three cubes you can't assume its there, due to the rule, "theres no hidden cubes unless they support other structures"

 

[tendram]

Because that cube that you highlighted in blue is blocked off by the stack of 3 cubes you can't assume its there, if you could see the vertical line or horizontal line coming from the top left hand corner of the blue outlined cube then you could assume its there, but because its blocked off by the stack of three cubes you can't assume its there, due to the rule, "theres no hidden cubes unless they support other structures"

I guess...I still say its there In all seriousness though, I see what you're saying now. Pay no attention to the above post, I've been doing Math Destroyer and studying for class most of the evening so my critical thinking skills need some time to recover 😀

 

[jonishere5]

Tendram: Hey its no problem this is a tricky problem! If anyone else is stuck on this I could post a nice little diagram explanation.

Teeth12345:I highly doubt we would see something like this on the real DAT, the DAT is more straightforward.

 

[Teeth12345]

Jonishere, glad to hear that!

Tendram, I totally know how you feel. I just started doing destroyer a few days ago and man I wish I had started sooner. So many random crazy things going on in Ochem...by the end of the night, I start to create my own reactions and rules 😀