It is currently 19 Apr 2018, 17:17
My Tests

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.

0 < t < 1

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 3211
Followers: 49

Kudos [?]: 512 [0], given: 2573

CAT Tests
0 < t < 1 [#permalink] New post 07 Nov 2017, 03:08
Expert's post
00:00

Question Stats:

81% (00:26) correct 18% (01:11) wrong based on 11 sessions


0 < t < 1

Quantity A
Quantity B
1 - t
\frac{1}{2} + t




A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________

Get the 2 FREE GREPrepclub Tests


Last edited by Carcass on 09 Nov 2017, 12:16, edited 1 time in total.
Edited by Carcass
1 KUDOS received
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 0

Kudos [?]: 273 [1] , given: 66

Re: 0 < t < 1 [#permalink] New post 07 Nov 2017, 05:40
1
This post received
KUDOS
Quantity B is equal to 3/2 that is greater than 1. Quantity A is 1 minus a number greater than 0, so it must be less than 1. Thus, quantity B is greater.

Answer B
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 3211
Followers: 49

Kudos [?]: 512 [0], given: 2573

CAT Tests
Re: 0 < t < 1 [#permalink] New post 09 Nov 2017, 03:49
Expert's post
OA Added.

Thank you
_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 0

Kudos [?]: 273 [1] , given: 66

Re: 0 < t < 1 [#permalink] New post 09 Nov 2017, 08:24
1
This post received
KUDOS
Carcass wrote:
OA Added.

Thank you



Are you sure there are no typos in the text of the question? I mean the answer must be B if the quantities are the ones reported. If t is between 0 and 1, it must be positive. Then, if we subtract 1 from both quantities we get a comparison between -t and 1/2. Now, -t is -(something positive) so it is negative, while 1/2 is positive. Answer is still B
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 3211
Followers: 49

Kudos [?]: 512 [0], given: 2573

CAT Tests
Re: 0 < t < 1 [#permalink] New post 09 Nov 2017, 12:15
Expert's post
Yes, you are truly right. The second quantity is not 1 but t. Sorry for the inconvenience :) but the OA is still D

Edited
_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 0

Kudos [?]: 273 [1] , given: 66

Re: 0 < t < 1 [#permalink] New post 12 Nov 2017, 10:17
1
This post received
KUDOS
Written in this way we can sum t, subtract 1/2 and divide by 2 on both sides in order to get a comparison between 1/4 and t. Then, given that t is between 0 and 1 it may be greater than 1/4 (e.g. if equal to 1/2) but also smaller (if equal to 1/6). Answer D
1 KUDOS received
Intern
Intern
Joined: 19 May 2017
Posts: 1
Followers: 0

Kudos [?]: 1 [1] , given: 0

Re: 0 < t < 1 [#permalink] New post 13 Nov 2017, 11:40
1
This post received
KUDOS
0 < t < 1

Suppose t = 0.9 then,
Quantity A : 1 - t = 1 - 0.9 = 0.1, and
Quantity B : 1/2 + t = 0.5 + 0.9 = 1.4
In this case: B) Quantity B is greater.

Suppose t = 0.1 then,
Quantity A : 1 - t = 1 - 0.1 = 0.9, and
Quantity B : 1/2 + t = 0.5 + 0.1 = 0.6
In this case: A) Quantity A is greater.

So the correct answer is : D) The relationship cannot be determined from the information given.
1 KUDOS received
PrepScholar Expert
User avatar
Joined: 07 Nov 2017
Posts: 14
WE: Education (Education)
Followers: 1

Kudos [?]: 18 [1] , given: 0

Re: 0 < t < 1 [#permalink] New post 13 Nov 2017, 11:54
1
This post received
KUDOS
Expert's post
A great way to approach this question is by subtracting one quantity from another. That way, you can compare the value 0 to an expression, and it'll be easier to see which quantity is greater. So let's start by subtracting Quantity A from both quantities. That would give us:

Quantity A: 1-t - (1-t) = 0
Quantity B: 1/2+t - (1-t) = 1/2 + t - 1 + t = -1/2 + 2t

Now we can plug in the extreme values for t. Since t can go all the way down to just above 0, Quantity B in this case could go all the way down to just above -1/2. This is less than Quantity A, so we can eliminate B and C as the correct answers. Next, since t can go all the way up to just below 1, Quantity B in this case could go all the way up to just below 3/2. Since this is greater than Quantity A, we can eliminate A as the correct answer. Thus, the only answer remaining is D.
_________________

Corey
PrepScholar GRE Instructor

https://gre.prepscholar.com

Come attend a free GRE Workshop: Complete Mastery of GRE Quantitative Comparison. Sign up today while spots are still open!
https://events.genndi.com/channel/GRE-Workshop

3 KUDOS received
GRE Instructor
User avatar
Joined: 10 Apr 2015
Posts: 763
Followers: 34

Kudos [?]: 661 [3] , given: 3

CAT Tests
Re: 0 < t < 1 [#permalink] New post 14 Nov 2017, 07:54
3
This post received
KUDOS
Expert's post
Carcass wrote:


0 < t < 1

Quantity A
Quantity B
1 - t
\frac{1}{2} + t






We can solve this question using matching operations

Given:
Quantity A: 1 - t
Quantity B: 1/2 + t

Add t to both quantities to get:
Quantity A: 1
Quantity B: 1/2 + 2t

Subtract 1/2 from both quantities to get:
Quantity A: 1/2
Quantity B: 2t

Divide both quantities by 2 to get:
Quantity A: 1/4
Quantity B: t

We're told that 0 < t < 1

So, for example, t COULD equal 1/4, in which case the quantities are EQUAL
t COULD also equal 1/2, in which case the Quantity B is greater
t COULD also equal 1/10, in which case the Quantity A is greater

Answer: D

RELATED VIDEO FROM OUR COURSE

_________________

Brent Hanneson – Founder of greenlighttestprep.com

Image

Check out the online reviews of our course

Intern
Intern
Joined: 11 Jan 2018
Posts: 43
Followers: 0

Kudos [?]: 21 [0], given: 7

Re: 0 < t < 1 [#permalink] New post 28 Feb 2018, 13:47
Such questions must be solved while putting extreme values, (i.e maximum or minimum, which can be imagined).
Max: t = 0.99999999
Min: t = 0.00000001

There's how, you can easily and quickly manipulate that in first case, Quantity B is greater, while on second case, Quantity A will be greater.

So it's just process of thinking, rather than just putting values to find answer.
So Answer D.
_________________

Persistence >>>>>>> Success

Don't say thanks, just give KUDOS.
1 kudos = 1000 Thanks

Re: 0 < t < 1   [#permalink] 28 Feb 2018, 13:47
Display posts from previous: Sort by

0 < t < 1

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms of Use| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.