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

It is currently 25 May 2019, 00:50

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

Whenever a star transforms into a supernova, it exhibits surges of act

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

Hide Tags

 
Senior Manager
Senior Manager
User avatar
P
Joined: 10 Apr 2018
Posts: 260
Location: United States (NC)
Whenever a star transforms into a supernova, it exhibits surges of act  [#permalink]

Show Tags

New post 10 Jul 2018, 23:08
6
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

58% (01:41) correct 42% (01:49) wrong based on 160 sessions

HideShow timer Statistics

Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. The star LV-426 has recently been exhibiting signs of turbulent activity. In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas
(B) Whether other stars that became supernovas also exhibited periods of dormancy
(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova
(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity
(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last

_________________
Probus

~You Just Can't beat the person who never gives up~ Babe Ruth
Manager
Manager
User avatar
S
Joined: 02 Mar 2018
Posts: 66
Location: India
GMAT 1: 640 Q51 V26
GPA: 3.1
Reviews Badge
Re: Whenever a star transforms into a supernova, it exhibits surges of act  [#permalink]

Show Tags

New post 11 Jul 2018, 02:33
Explanation:

A) Whether LV-426 is of the same size as other stars that have exploded into supernovas(We are not told anything about the size hence irrelevant)
(B) Whether other stars that became supernovas also exhibited periods of dormancy(From argument we imply that either cases a star can become supernova)
(C)Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova(answer to this question can undermine or strengthen the conclusion)
(D)Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity(In the argument we are told LV-426 is showing such activity after dormancy hence irrelevant)
(E)Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last(Clearly irreverent- we are not concerned about past studies of LV-426)
Manager
Manager
User avatar
G
Status: In last prep stage
Joined: 11 Jun 2017
Posts: 155
GMAT 1: 630 Q44 V33
GMAT 2: 680 Q47 V37
GPA: 3.2
Premium Member
Re: Whenever a star transforms into a supernova, it exhibits surges of act  [#permalink]

Show Tags

New post 11 Jul 2018, 21:58
Probus wrote:
Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. The star LV-426 has recently been exhibiting signs of turbulent activity. In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas
(B) Whether other stars that became supernovas also exhibited periods of dormancy
(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova
(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity
(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last


My reasoning:
A.No mention of size in argument,so eliminate.
B.Dormancy mentioned,so keep it for now.
C.Turbulence related,keep this as well.
D.No mention of Temperature in argument ,so eliminate
E.No relation between dormancy duration and surges of activity,so eliminate.
That keeps B and C,I chose C since the crux of argument is star to supernova.Which option's( among B and C), answer as yes makes sure of this crux.So C.
_________________
Thanks,
Ankit
Target Score:730+

If the post was useful,please send the kudos
Manager
Manager
User avatar
S
Status: The darker the night, the nearer the dawn!
Joined: 16 Jun 2018
Posts: 75
GMAT ToolKit User CAT Tests
Re: Whenever a star transforms into a supernova, it exhibits surges of act  [#permalink]

Show Tags

New post 05 Apr 2019, 22:27
1
Probus wrote:
Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. The star LV-426 has recently been exhibiting signs of turbulent activity. In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas
(B) Whether other stars that became supernovas also exhibited periods of dormancy
(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova
(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity
(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last


Conclusion:
    Given the surge in activity --------------> Star transformation into the supernova is CERTAIN.

Pre-Thinking
Assumption: The recent activity AFTER dormancy is ENOUGH to decide about the transformation.
------------------
The variance test:
(B) Whether other stars that became supernovas also exhibited periods of dormancy.

YES, other stars that BECOME supernovas exhibit dormancy
NO, other stars that BECOME supernovas do NOT exhibit dormancy

    In both cases, Stars DID already become a supernova.
Thus, CANNOT decide on the basis of B how the recent activity can be a deciding factor on the certainity of the transformation.

Takeaways:
    ALWAYS Pre-Think the problem.
    Find 4 INCORRECT answer choices.
    Spend sufficient time in LEARNING stage.

_________________
---------------------------------------------------------------------------------
“The trouble is, you think you have time.” – Buddha
Giving Kudos is the best way to encourage and appreciate people.
Manager
Manager
avatar
B
Joined: 29 Mar 2015
Posts: 83
Location: India
GMAT 1: 640 Q49 V28
GPA: 3.1
GMAT ToolKit User Reviews Badge
Re: Whenever a star transforms into a supernova, it exhibits surges of act  [#permalink]

Show Tags

New post 07 Apr 2019, 05:51
Probus wrote:
Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. The star LV-426 has recently been exhibiting signs of turbulent activity. In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas
(B) Whether other stars that became supernovas also exhibited periods of dormancy
(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova
(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity
(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last


my reasoning on why B is incorrect

we are only concerned with the fact that LV-426 is now showing signs of turbulent activity

we are not concerned with the data whether periods of dormancy affect chances of a star in exploding into Supernova

kindly correct me if i am wrong.
GMAT Club Bot
Re: Whenever a star transforms into a supernova, it exhibits surges of act   [#permalink] 07 Apr 2019, 05:51
Display posts from previous: Sort by

Whenever a star transforms into a supernova, it exhibits surges of act

  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®.