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What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 01:57
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67% (00:37) correct 33% (00:00) wrong based on 5 sessions
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What fractional part of the total surface area of cube C is red? (1) Each of 3 faces of C is exactly 1/2 red. (2) Each of 3 faces of C is entirely white. OPEN DISCUSSION OF THIS QUESTION IS HERE: whatfractionalpartofthetotalsurfaceareaofcubecisred96929.html== Message from the GMAT Club Team == THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION. This discussion does not meet community quality standards. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 02:24
We need to know all the faces to conclude the fraction part.
Stmt 1 > using this we know nothing about the remaining 3 faces Stmt2>We know nothing about the other 3 faces
combining 1&2 > we know that of the 6 faces, 3 are white and 1.5 is red and 1.5 is another color thus 1/4th is red
so C is the answer



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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 02:58
Guys, Can you explain wording of "each of 3 faces"? Is it means that 3 particular faces of cube are exactly 1/2 red (white) or any 3 faces of cube are exactly 1/2 red (white)? Please, clarify!
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 03:31
walker wrote: Guys, Can you explain wording of "each of 3 faces"?
Is it means that 3 particular faces of cube are exactly 1/2 red (white) or any 3 faces of cube are exactly 1/2 red (white)?
Please, clarify! I found I mistake. "Each of 3 faces" means that 3 faces each have exacltly 1/2 red. So we dont know anything about the other 3 faces. And the same with statement 2 E is my choice.
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 03:39
sondenso wrote: "Each of 3 faces" means that 3 faces each have exacltly 1/2 red. So we dont know anything about the other 3 faces. And the same with statement 2 E is my choice. Sondenso, If this meaning is right, we can use following: 1. cube has 6 faces 2. a face can be white or 1/2 red (C) Therefore, C is correct. 3 faces are white and 3 other faces are 1/2 red and \(ratio=\frac{3*\frac12}{6}=\frac14\)
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 03:49
walker wrote: sondenso wrote: "Each of 3 faces" means that 3 faces each have exacltly 1/2 red. So we dont know anything about the other 3 faces. And the same with statement 2 E is my choice. Sondenso, If this meaning is right, we can use following: 1. cube has 6 faces 2. a face can be white or 1/2 red (C) Therefore, C is correct. 3 faces are white and 3 other faces are 1/2 red and \(ratio=\frac{3*\frac12}{6}=\frac14\) Walker, The 1 and the 2 combined do not say "the 3 faces...red" and "the other 3 faces...white", so we have 6 faces, how can we know what face? right?
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 06:54
Sondenso,
The stmt2 says "Each of 3 faces of C is entirely white" that definitely means the other 3 faces are 1/2 read, isn't it?



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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 11:00
Sorry, guys, I'm not verbal guru
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 19:38
prasannar wrote: Sondenso,
The stmt2 says "Each of 3 faces of C is entirely white" that definitely means the other 3 faces are 1/2 read, isn't it? prasannar, I can not understand how "entirely" says that it is "other"? or "entirely" is "other" @walker, me too. I am not a verbal killer, but...
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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 21:02
Stmt2 says 3 faces are entirely white, that leaves us with the other 3 faces and we don't know anything about them Stmt1 + Stmt2 > gives the context that I concluded Walker and Sondenso don't tease with me with the Verbal Guru stuff



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Re: What fractional part of the total surface area of cube C is red?
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22 Mar 2008, 22:00
prasannar wrote: Stmt2 says 3 faces are entirely white, that leaves us with the other 3 faces and we don't know anything about themStmt1 + Stmt2 > gives the context that I concluded Walker and Sondenso don't tease with me with the Verbal Guru stuff I love this explaination, and the discusion too, you definitely persuded me! Thank you prasannar!
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Re: What fractional part of the total surface area of cube C is red?
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23 Jan 2011, 09:55
C per me. 3 of the 6 sides are entirely white  means definitely not red. Let's talk about the other 3 sides now. First statement says: 3 of the 6 sides are exactly 1/2 red. Means; they must be talking about the 3 sides which are not entirely white. Now, if "a" is side: area of 1 side is a^2. total area for 6 sides is 6*a^2 area with red will be 3*((a^2)/2). Because half the area of each of the 3 remaining faces is red. (a^2)/2 will be half the area times 3 for three sides. now, divide: [3*((a^2)/2)]/[6*a^2]=1/4. We got the answer.
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Re: What fractional part of the total surface area of cube C is red?
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21 Aug 2017, 13:59
What fractional part of the total surface area of cube C is red?(1) Each of 3 faces of C is exactly 1/2 red > 1/2 of 3 faces out of 6 is red, but we know nothing about the other 3. What if some fraction of the other 3 faces is red also? For example 1/3 of the 4th face is red, 1/4th of the 5th face and 1/10th of the 6th face? Hence statement (1) is not sufficient. (2) Each of 3 faces of C is entirely white > 3 faces out of 6 are white, but we know nothing about the other 3. Not sufficient. (1)+(2) Half of 3 faces is red and other 3 faces are entirely white > fractional part which is red is 1.5/6=1/4. Sufficient. Answer: C. OPEN DISCUSSION OF THIS QUESTION IS HERE: whatfractionalpartofthetotalsurfaceareaofcubecisred96929.html== Message from the GMAT Club Team == THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION. This discussion does not meet community quality standards. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.
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Re: What fractional part of the total surface area of cube C is red?
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