GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 18 Nov 2018, 19:06

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • How to QUICKLY Solve GMAT Questions - GMAT Club Chat

     November 20, 2018

     November 20, 2018

     09:00 AM PST

     10:00 AM PST

    The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
  • The winning strategy for 700+ on the GMAT

     November 20, 2018

     November 20, 2018

     06:00 PM EST

     07:00 PM EST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

Can a certain rectangular sheet of glass be positioned on a

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 15 Mar 2015
Posts: 24
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 27 Jul 2015, 06:11
1
EvaJager wrote:
fameatop wrote:
Can a certain rectangular sheet of glass be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop?
(1) The tabletop is 36 inches wide by 60 inches long.
(2) The area of one side of the sheet of glass is 2,400 square inches.

Question can be restated as "Is Glass sheet rectangular & of same dimensions as that of tabletop?"
1) No info is given about glass sheet dimensions- Insufficient
2) No info is given regarding the dimensions of tabletop & its not stated whether the glass sheet is Rectangular, Square or Parallelogram etc.--->Insufficient
1+2) No info is given whether the glass sheet is Rectangular, Square or Parallelogram etc ---Insufficient

Answer E


The question says "Can a certain rectangular sheet of glass..."

Maybe it looks strange the information in statement (2): "The area of one side of the sheet of glass..."
But, the sheet of glass is in fact a 3D object, a rectangular box, probably quite thin. So, we are talking about a rectangular side with the largest area. I don't think they cut the glass at an angle other than 90 degrees.
Anyway, the answer is E because the area of 2,400 although greater than 36*60 = 2,160, if the dimensions of the sheet are 30 and 80, it will not cover the tabletop.
But if the dimensions are 40 and 60, then yes.
The sheet of glass needs to cover the tabletop, not necessarily to be of identical dimensions. In other words, the sheet of glass can be larger than the tabletop, although this isn't practical....


Hi guys!

To me, this question got me on this part of Statement 2: "The area of one side of the sheet of glass..." it really confused me, but once I imagined the sheet of glass as one 3D plate, with a thin layer as its height, and 3 surface areas (side areas) it was clear that the statement was referring to the surface area of one side, and that on the bottom line it was not sufficient since we don't have any info about the tabletop to compare with.

Am I right here ?

Thanks everyone!
CEO
CEO
avatar
S
Joined: 20 Mar 2014
Posts: 2635
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 27 Jul 2015, 06:27
cfpenteado wrote:
EvaJager wrote:
fameatop wrote:
Can a certain rectangular sheet of glass be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop?
(1) The tabletop is 36 inches wide by 60 inches long.
(2) The area of one side of the sheet of glass is 2,400 square inches.

Question can be restated as "Is Glass sheet rectangular & of same dimensions as that of tabletop?"
1) No info is given about glass sheet dimensions- Insufficient
2) No info is given regarding the dimensions of tabletop & its not stated whether the glass sheet is Rectangular, Square or Parallelogram etc.--->Insufficient
1+2) No info is given whether the glass sheet is Rectangular, Square or Parallelogram etc ---Insufficient

Answer E


The question says "Can a certain rectangular sheet of glass..."

Maybe it looks strange the information in statement (2): "The area of one side of the sheet of glass..."
But, the sheet of glass is in fact a 3D object, a rectangular box, probably quite thin. So, we are talking about a rectangular side with the largest area. I don't think they cut the glass at an angle other than 90 degrees.
Anyway, the answer is E because the area of 2,400 although greater than 36*60 = 2,160, if the dimensions of the sheet are 30 and 80, it will not cover the tabletop.
But if the dimensions are 40 and 60, then yes.
The sheet of glass needs to cover the tabletop, not necessarily to be of identical dimensions. In other words, the sheet of glass can be larger than the tabletop, although this isn't practical....


Hi guys!

To me, this question got me on this part of Statement 2: "The area of one side of the sheet of glass..." it really confused me, but once I imagined the sheet of glass as one 3D plate, with a thin layer as its height, and 3 surface areas (side areas) it was clear that the statement was referring to the surface area of one side, and that on the bottom line it was not sufficient since we don't have any info about the tabletop to compare with.

Am I right here ?

Thanks everyone!


Yes, for statement 2 to be sufficient you needed to have 2 pieces of information:

1. Area of the tabletop
2. Area of the glass face parallel to the tabletop. If you are given "area" of a side of a cuboid , this area can belong to any of the 6 surface areas. This is the reason why even when you combine the 2 statements , you still do not have an unambiguous yes or no
Intern
Intern
avatar
Joined: 15 Mar 2015
Posts: 24
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 27 Jul 2015, 06:34
Hi guys!

To me, this question got me on this part of Statement 2: "The area of one side of the sheet of glass..." it really confused me, but once I imagined the sheet of glass as one 3D plate, with a thin layer as its height, and 3 surface areas (side areas) it was clear that the statement was referring to the surface area of one side, and that on the bottom line it was not sufficient since we don't have any info about the tabletop to compare with.

Am I right here ?

Thanks everyone![/quote]

Yes, for statement 2 to be sufficient you needed to have 2 pieces of information:

1. Area of the tabletop
2. Area of the glass face parallel to the tabletop. If you are given "area" of a side of a cuboid , this area can belong to any of the 6 surface areas. This is the reason why even when you combine the 2 statements , you still do not have an unambiguous yes or no[/quote]

Nice, thanks.
Interpretation got me good on this one!
SVP
SVP
avatar
B
Joined: 06 Nov 2014
Posts: 1882
Re: Geometry question  [#permalink]

Show Tags

New post 18 Oct 2015, 02:29
1
soh_acca wrote:
There is a question in official guide for GMAT Review 2015, "Can a certain rectangular sheet of glass be positioned
on a rectangular tabletop so that it covers the entire
tabletop and its edges are parallel to the edges of the
tabletop?
(1) The tabletop is 36 inches wide by 60 inches
long.
(2) The area of one side of the sheet of glass is
2,400 square inches."

I thought that option (1) would be sufficient while (2) would not be. But the correct answer is that both statements together are still not sufficient.

Can someone explain this?


Hi soh_acca,

You posted this question in some other forum also, so copying my response.
Also, as a general rule, search a question on GMAT Club before posting it again.

Statement 1 is not sufficient because we do not have any information about the sheet
Statement 2 is not sufficient because we do not have any information about the table top

Combining the both, we do not have any information about the orientation of the sheet.

Hence both statements combined can also not answer the question

Hence option E
Target Test Prep Representative
User avatar
P
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 4170
Location: United States (CA)
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 25 Aug 2016, 15:08
Bunuel wrote:
Can a certain rectangular sheet of glass be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop?

(1) The tabletop is 36 inches wide by 60 inches long.
(2) The area of one side of the sheet of glass is 2,400 square inches.



We need to determine whether a rectangular sheet of glass can cover an entire rectangular tabletop. We are given that the edges must be parallel to the table top; however, we know neither the dimensions of the sheet of glass nor the dimensions of the tabletop.

Statement One Alone:

The tabletop is 36 inches wide by 60 inches long.

Since we do not have any information about the dimensions of the rectangular sheet of glass, statement one alone is not sufficient to answer the question. We can eliminate answer choices A and D.

Statement Two Alone:

The area of one side of the sheet of glass is 2,400 square inches.

Since we do not have any information about the dimensions of the tabletop, statement two alone is not sufficient to answer the question. We can eliminate answer choice B.

Statements One and Two Together:

Using the information from statements one and two we know the following:

1) The tabletop is 36 inches wide by 60 inches long.

2) The area of one side of the sheet of glass is 2,400 square inches.

While initially we may think we have enough information to solve the problem, we actually do not, because we do not know the exact dimensions of the sheet of glass.

With an area of 2,400 square inches, we can have different lengths and widths of the sheet of glass. Some of these lengths and widths will allow the sheet to cover the table, while others will not. Let’s consider two cases.

Case # 1

Width of glass = 24 inches

Length of glass = 100 inches

Width of table = 36 inches

Length of table = 60 inches

We see that the width of the glass is shorter than the width of the table, so in case #1, the sheet of glass does not cover the entire table top.

Case # 2

Width of glass = 40 inches

Length of glass = 60 inches

Width of table = 36 inches

Length of table = 60 inches

We see that the width of the glass is longer than the width of the table and the length of the glass is equal to the length of the table, so in case #2, the sheet of glass does cover the entire table top.

The answer is E.
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Intern
Intern
avatar
B
Joined: 03 Jan 2017
Posts: 30
Re: Can a certain rectangular sheet of glass be positioned on a rectangula  [#permalink]

Show Tags

New post 17 Feb 2017, 06:58
1
Statement A: insufficient
No information about sheet of glass.

Option B: insufficient
No information about table top.

Combining: area of table top A= 36*60
Area of sheet of glass B= 2400.

But that can be 1*2400
2*1200
Or 40*60.
So it can or can not cover the table top.
Not sure.

Correct ans. E

Hit kudos if you like it

Sent from my MotoG3 using GMAT Club Forum mobile app
Study Buddy Forum Moderator
User avatar
D
Joined: 04 Sep 2016
Posts: 1253
Location: India
WE: Engineering (Other)
Premium Member CAT Tests
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 21 Aug 2017, 18:50
hi Bunuel shashankism Engr2012

In this Q, had statement 2 been The area of one side of the sheet of glass is 2,400 square inches
then only st 2 would have been sufficient?

Also in original st2, the phrase one side is just meant for confusion, I guess area be L*B . Am I correct?
_________________

It's the journey that brings us happiness not the destination.

Manager
Manager
avatar
B
Joined: 30 Apr 2013
Posts: 80
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 07 Nov 2017, 02:51
what does it mean when the question says " its edges are parallel to the edges of the tabletop"?

Does it mean that glass sheet has to be bigger than table so that it covers entire tabletop and its edges will be parallel to the edges of tabletop.
EMPOWERgmat Instructor
User avatar
V
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 12883
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 12 Dec 2017, 10:58
Hi All,

We're asked if a certain rectangular sheet of glass can be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop. This is a YES/NO question. To answer it, we'll need specific information about the size of the sheet and the size of the tabletop.

1) The tabletop is 36 inches wide by 60 inches long.

Fact 1 gives us the dimensions of the tabletop, but we don't know anything about the dimensions of the sheet.
Fact 1 is INSUFFICIENT

2) The area of one side of the sheet of glass is 2,400 square inches.

Fact 2 gives us the AREA of the sheet, but NOT its specific dimensions - and we don't know the dimensions of the table. The dimensions of the sheet could be a variety of different combinations, including....
40 inches by 60 inches
30 inches by 80 inches
1 inch by 2400 inches
Etc.
Fact 2 is INSUFFICIENT

Combined, we know:
The tabletop is 36 inches by 60 inches.
The AREA of the sheet is 2400 square inches.
IF.... the dimensions of the sheet are:
40 inches by 60 inches... then the answer to the question would be YES.
30 inches by 80 inches... then the answer to the question would be NO.
Combined, INSUFFICIENT.

Final Answer:

GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free
  Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

*****Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!*****

Manager
Manager
avatar
B
Joined: 24 Mar 2018
Posts: 159
CAT Tests
Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 22 May 2018, 05:31
Bunuel
I have a doubt here: If we take 30*80 , it will not cover the entire tabletop .
if we take 60*40 , it will cover the entire top but it's edges won't be parallel to that of tabletop
Hence the answer should be C instead of E .

Please correct me if I missed any point.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50627
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 22 May 2018, 06:18
teaserbae wrote:
Bunuel
I have a doubt here: If we take 30*80 , it will not cover the entire tabletop .
if we take 60*40 , it will cover the entire top but it's edges won't be parallel to that of tabletop
Hence the answer should be C instead of E .

Please correct me if I missed any point.


For 30*80, case the answer to the question is NO.
For 40*60, case the answer to the question is YES.

In a Yes/No Data Sufficiency questions, statement(s) is sufficient if the answer is “always yes” or “always no” while a statement(s) is insufficient if the answer is "sometimes yes" and "sometimes no".

P.S. When a DS question asks about the value of some variable, then the statement(s) is sufficient ONLY if you can get the single numerical value of this variable.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
avatar
B
Joined: 24 Mar 2018
Posts: 159
CAT Tests
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 22 May 2018, 22:55
Bunuel wrote:
teaserbae wrote:
Bunuel
I have a doubt here: If we take 30*80 , it will not cover the entire tabletop .
if we take 60*40 , it will cover the entire top but it's edges won't be parallel to that of tabletop
Hence the answer should be C instead of E .

Please correct me if I missed any point.


For 30*80, case the answer to the question is NO.
For 40*60, case the answer to the question is YES.

In a Yes/No Data Sufficiency questions, statement(s) is sufficient if the answer is “always yes” or “always no” while a statement(s) is insufficient if the answer is "sometimes yes" and "sometimes no".

P.S. When a DS question asks about the value of some variable, then the statement(s) is sufficient ONLY if you can get the single numerical value of this variable.


For 40*60 the answer to the question should be NO as it won't be parallel to that of tabletop
It will cover the tabletop but it won't be parallel so shouldn't it be NO?
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50627
Re: Can a certain rectangular sheet of glass be positioned on a  [#permalink]

Show Tags

New post 22 May 2018, 23:19
1
teaserbae wrote:
Bunuel wrote:
teaserbae wrote:
Bunuel
I have a doubt here: If we take 30*80 , it will not cover the entire tabletop .
if we take 60*40 , it will cover the entire top but it's edges won't be parallel to that of tabletop
Hence the answer should be C instead of E .

Please correct me if I missed any point.


For 30*80, case the answer to the question is NO.
For 40*60, case the answer to the question is YES.

In a Yes/No Data Sufficiency questions, statement(s) is sufficient if the answer is “always yes” or “always no” while a statement(s) is insufficient if the answer is "sometimes yes" and "sometimes no".

P.S. When a DS question asks about the value of some variable, then the statement(s) is sufficient ONLY if you can get the single numerical value of this variable.


For 40*60 the answer to the question should be NO as it won't be parallel to that of tabletop
It will cover the tabletop but it won't be parallel so shouldn't it be NO?


Two sides of the glass will coincide the two sides of the tabletop, but we can consider this to be parallel.

Else you can consider other dimensions of the glass, for example, 2400/61 =~39,... by 61.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

GMAT Club Bot
Re: Can a certain rectangular sheet of glass be positioned on a &nbs [#permalink] 22 May 2018, 23:19

Go to page   Previous    1   2   [ 33 posts ] 

Display posts from previous: Sort by

Can a certain rectangular sheet of glass be positioned on a

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.