Cube Counting: Illusion?

[Bigbirdo]

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How can you actually whether there is a cube in the middle? What are some tips would you suggest for identifying illusion cubes like this?

 

[shaidester]

If I saw on that my test I would cry. That is so unfair.

 

[shyfox9p]

There is an empty space there right?

 

[Bigbirdo]

There is an empty space there right?

Unfortunately...no, there is a cube over there. This is from Achiever

 

[shyfox9p]

Unfortunately...no, there is a cube over there. This is from Achiever

From the other threads, there aren't questions like these on the real exam. Hopefully they're right.

 

[dragonflymoon]

I thought that the only 'hidden' cubes could be ones necessary for the structure. There's no shading or anything so how are we supposed to distinguish that?That doesn't even make sense.

 

[kadify]

I'm not sure where I read it but I'm fairly sure I read somewhere that there are no unseen holes in the middle of structures. So you can assume that is a cube with only 1 face painted.

 

[stuntdragon]

I'm not sure where I read it but I'm fairly sure I read somewhere that there are no unseen holes in the middle of structures. So you can assume that is a cube with only 1 face painted.

Yeah, I agree. When I saw this I assumed there was a cube not the absence of a cube. Isn't it one of the cube counting rules?


Sent from my iPhone using Tapatalk

 

[Bigbirdo]

I'm not sure where I read it but I'm fairly sure I read somewhere that there are no unseen holes in the middle of structures. So you can assume that is a cube with only 1 face painted.

I am confused. Isnt the middle cube a seen hole?

 

[Bigbirdo]

Yeah, I agree. When I saw this I assumed there was a cube not the absence of a cube. Isn't it one of the cube counting rules?


Sent from my iPhone using Tapatalk

Can you explain the rule a little more? I thought the only rule is that there is no floating cube.

 

[yatripkaya]

I thought the only rule is that there is no floating cube too,thank you

 

[kadify]

I'm pretty sure there was a statement I read somewhere that there are no unseen holes, or semi-seen holes. If there is ever doubt if there is a cube or not, to this degree, then it is assumed there is a cube there.

 

[dragonflymoon]

😱😱😱

 

[stuntdragon]

Can you explain the rule a little more? I thought the only rule is that there is no floating cube.

Taken from my Princeton Review Cracking the DAT book:

The ADA instructions for Cube Counting state:

Each figure has been made by cementing together cubes of the same size. After being cemented each group was painted on all sides except for the bottom on which it is resting. The only hidden cubes are those required to support other cubes. You are to examine the figure closely to determine how many cubes have:

• only one of their sides painted.
• only two of their sides painted
• only three of their sides painted
• only four of their sides painted
• All of their sides painted

NOTE: there are no problems for which zero (0) is the correct answer​

 

[stuntdragon]

Okay everyone, I just got tricked by own assumption, where I ASSUMED there was a cube there and it failed me

The question was asking how many cubes have two of their sides painted, and look, i assumed that there would be 6, but there are only 4 (because those two are missing)

 

[stuntdragon]

So apparently, if you CAN'T see a cube that is ground level, then there is no cube there, unless it's supporting a cube above it. Correct me if I'm wrong.

 

[Bigbirdo]

Okay everyone, I just got tricked by own assumption, where I ASSUMED there was a cube there and it failed me

The question was asking how many cubes have two of their sides painted, and look, i assumed that there would be 6, but there are only 4 (because those two are missing)

Wtf..... i wanna cry

 

[mvp0130]

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