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# What fractional part of the total surface area of cube C

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What fractional part of the total surface area of cube C [#permalink]

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23 Jun 2004, 19:26
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I got this one wrong...

What fractional part of the total surface area of cube C is red?

a. Each of the 3 faces of C is exactly 1/2 red.

b. Each of the 3 faces of C is entirely white.
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24 Jun 2004, 05:09
Hi Maneesh

What fractional part of the total surface area of cube C is red?

a. Each of the 3 faces of C is exactly 1/2 red.

b. Each of the 3 faces of C is entirely white.

Statement A is enough to show that the fraction of red colored surface. I hope this helped.

Statement D does not give information on the red surface.

Regards
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24 Jun 2004, 06:53

We do not know from one that the other three faces are full red, or no red od some other fraction of red.
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24 Jun 2004, 07:59
Bhai wrote:

We do not know from one that the other three faces are full red, or no red od some other fraction of red.

Bhai, it is unfair to say "Each of the 3 faces ...", because there are 6 faces for every cube. I think this is misleading... How "FACE" is defined? I don't think the OG has any references to this definition. This question sonds really controversial to me...
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24 Jun 2004, 09:58
Hi Bhai

I understood what you mean, though. Does ETS give half info .. i mean, when they say EACH of the 3 faces, then it does it not mean, only 3 faces have half red. The other faces, do not have RED in them.?

This looks like a DS and a CR combo.

Thanks for correcting.

Regards
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24 Jun 2004, 17:37
carsen wrote:
Hi Bhai

I understood what you mean, though. Does ETS give half info .. i mean, when they say EACH of the 3 faces, then it does it not mean, only 3 faces have half red. The other faces, do not have RED in them.?

This looks like a DS and a CR combo.

I like this one

Thanks for correcting.

Regards

I think when ETS says that each of the three face if 1/2 red it means that they are talking about just that three faces. They expect from us to not know about the other three faces. Hence A is not sufficient. Thats why we need more info about the other three faces to come to the solution.
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24 Jun 2004, 17:40
Emmanuel wrote:
Bhai wrote:

We do not know from one that the other three faces are full red, or no red od some other fraction of red.

Bhai, it is unfair to say "Each of the 3 faces ...", because there are 6 faces for every cube. I think this is misleading... How "FACE" is defined? I don't think the OG has any references to this definition. This question sonds really controversial to me...

I am sure it is a controversial question. Three out of 4 club members seems to agree.
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28 Jun 2004, 00:22
Controversial it is !

It seems more like an english twister
However i just wanted to add what I feel about GMAT maths questions.

Each of the 3 faces have = 3 faces each have

I think the confusion arose because our mind takes
each = each one of them
I know I sound stupid

GMAT problems have tricked me earlier too. I have faced a problem like something below.
There are 150 people. How many are drinkers ?
1. 80% smoke
2. 20% smoke and drink

I created venn diagrams and came up with an answer.
However,
The answer was E because there is no information about people who dont drink or who don't smoke.

That stumped me. I was also shouting THIS IS NOT FAIR then

- ash
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ash
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I'm crossing the bridge.........

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30 Jun 2004, 06:35
Just wanted to add something here!
I have seen a similar question in one of the mock test, and there also EACH refers to only three faces and not to the "pair of the three faces".
Hence I think in such questions it is safe to assume that "EACH" means only one face and not the "each of the opposite faces".
30 Jun 2004, 06:35
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