It is currently 20 Oct 2017, 03:42

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# mammoth's teeth

Author Message
TAGS:

### Hide Tags

Manager
Joined: 10 Nov 2010
Posts: 158

Kudos [?]: 334 [0], given: 6

### Show Tags

24 Mar 2011, 12:06
00:00

Difficulty:

15% (low)

Question Stats:

79% (09:00) correct 21% (01:56) wrong based on 199 sessions

### HideShow timer Statistics

[Reveal] Spoiler: OA

Attachments

mammoth.png [ 44.58 KiB | Viewed 2919 times ]

Last edited by vjsharma25 on 25 Mar 2011, 11:38, edited 1 time in total.

Kudos [?]: 334 [0], given: 6

Senior Manager
Joined: 17 Mar 2011
Posts: 449

Kudos [?]: 186 [0], given: 5

Location: United States (DC)
Concentration: General Management, Technology
GMAT 1: 760 Q49 V45
GPA: 3.37
WE: Information Technology (Consulting)

### Show Tags

24 Mar 2011, 13:04
Evidence:
Adult mammoth teeth from island are 25% smaller than mammoth teeth elsewhere

Conclusion:
mammoths that lived on island are smaller than other mammoths.

Assumption that bridges the gap:
tooth size relative to mammoth size is similar across all groups of mammoths.

To allow the conclusion to be properly drawn, we need to show support for the assumption.

(a) This casts doubt on the assumption.

(b) This is not relevant.

(c) This is not relevant, since we know that the teeth are from adults.

(d) Correct, this strongly supports the Assumption.

(e) Says nothing about size, which is the important factor here.

Kudos [?]: 186 [0], given: 5

Manager
Joined: 10 Nov 2010
Posts: 158

Kudos [?]: 334 [0], given: 6

### Show Tags

24 Mar 2011, 21:15
jko wrote:
Evidence:
Adult mammoth teeth from island are 25% smaller than mammoth teeth elsewhere

Conclusion:
mammoths that lived on island are smaller than other mammoths.

Assumption that bridges the gap:
tooth size relative to mammoth size is similar across all groups of mammoths.

To allow the conclusion to be properly drawn, we need to show support for the assumption.

(a) This casts doubt on the assumption.

(b) This is not relevant.

(c) This is not relevant, since we know that the teeth are from adults.

(d) Correct, this strongly supports the Assumption.

(e) Says nothing about size, which is the important factor here.

Why B is not relevant?

Kudos [?]: 334 [0], given: 6

Senior Manager
Joined: 09 Feb 2011
Posts: 272

Kudos [?]: 214 [0], given: 13

Concentration: General Management, Social Entrepreneurship
Schools: HBS '14 (A)
GMAT 1: 770 Q50 V47

### Show Tags

24 Mar 2011, 21:49
I think the answer should be B
Isn't D redundant, as it is an assumption that the author is already making within the question statement, and is admitting to doing so - 'provided that teeth are representative of their respective populations' Auhtor doesnt need this assumption again, does he?
A and C oppose or negate or contradict what is given in the question statement
isnt B giving an extra reason for teeth size to be small and assuming that this didnt happen in this case? Hence I went with B

Kudos [?]: 214 [0], given: 13

Manager
Joined: 07 Jan 2010
Posts: 143

Kudos [?]: 95 [0], given: 57

Location: So. CA
WE 1: 2 IT
WE 2: 4 Software Analyst

### Show Tags

24 Mar 2011, 21:50
we have to somehow link the claim made about teeth size with size of mammoth. choice (B) doesn't do that, rather it goes on talking about tooth wear
(D) fits the gap better in the assumption required

pretty good lsat question, you sure know how to pick the good ones

Kudos [?]: 95 [0], given: 57

Senior Manager
Joined: 17 Mar 2011
Posts: 449

Kudos [?]: 186 [0], given: 5

Location: United States (DC)
Concentration: General Management, Technology
GMAT 1: 760 Q49 V45
GPA: 3.37
WE: Information Technology (Consulting)

### Show Tags

25 Mar 2011, 03:54
vivesomnium wrote:
I think the answer should be B
Isn't D redundant, as it is an assumption that the author is already making within the question statement, and is admitting to doing so - 'provided that teeth are representative of their respective populations' Auhtor doesnt need this assumption again, does he?
A and C oppose or negate or contradict what is given in the question statement
isnt B giving an extra reason for teeth size to be small and assuming that this didnt happen in this case? Hence I went with B

D is not redundant, actually, the very fact that it is an assumption that the author made is WHY its the correct answer.

The statement:
'provided that teeth are representative of their respective populations'
Is not the same as:
'provided that teeth are representative of the sizes of their respective populations'

B is a statement about ALL woolly mammoths. All B does is show that the size of the teeth found by the paleontologists is the actual size of the mammoths in each population. This but this still doesn't allow the conclusion to be properly drawn, since we would still need to assume that tooth size is similarly proportionate to mammoth size across all mammoth populations

Kudos [?]: 186 [0], given: 5

Manager
Joined: 18 Oct 2010
Posts: 88

Kudos [?]: 8 [0], given: 0

### Show Tags

25 Mar 2011, 06:52
D here too

Kudos [?]: 8 [0], given: 0

Manager
Status: Bunuel's fan!
Joined: 08 Jul 2011
Posts: 227

Kudos [?]: 53 [0], given: 55

### Show Tags

23 Apr 2012, 12:19
For this type of question, i think i have spotted the pattern of choosing the obvious one. I do not think the real gmat is that way though

Kudos [?]: 53 [0], given: 55

Manager
Joined: 09 Apr 2013
Posts: 148

Kudos [?]: 119 [0], given: 24

Location: India
WE: Supply Chain Management (Consulting)

### Show Tags

25 Dec 2013, 04:47
Initially picked B but realized it is irrelevant. It has no effect on the conclusion upon negation.

D fits well.
_________________

+1 KUDOS is the best way to say thanks

"Pay attention to every detail"

Kudos [?]: 119 [0], given: 24

Current Student
Joined: 03 Feb 2013
Posts: 942

Kudos [?]: 1058 [0], given: 548

Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)

### Show Tags

27 Dec 2013, 09:14
jko wrote:
Evidence:
Adult mammoth teeth from island are 25% smaller than mammoth teeth elsewhere

Conclusion:
mammoths that lived on island are smaller than other mammoths.

Assumption that bridges the gap:
tooth size relative to mammoth size is similar across all groups of mammoths.

To allow the conclusion to be properly drawn, we need to show support for the assumption.

(a) This casts doubt on the assumption.

(b) This is not relevant.

(c) This is not relevant, since we know that the teeth are from adults.

(d) Correct, this strongly supports the Assumption.

(e) Says nothing about size, which is the important factor here.

Argument : Paleontologists found 25% smaller size teeth of adult woolly mammoths.
Conclusion : Overall Size of Woolly Mammoths is less than on average compared to the mammoths elsewhere

D) Tooth size among adult woolly mammoths was directly proportional to overall size of those mammoths.
This option is comparing the size among the woolly mammoths.

Whereas in option B) The teeth wear didn't decrease the size of the teeth of adult woolly mammoths significantly.
if negated, the teeth wear did decrease of the teeth size of the woolly mammoths significantly which breaks down the conclusion.

Any pointers?
_________________

Thanks,
Kinjal

My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961

Kudos [?]: 1058 [0], given: 548

Senior Manager
Joined: 04 May 2013
Posts: 354

Kudos [?]: 149 [0], given: 70

Location: India
Concentration: Operations, Human Resources
Schools: XLRI GM"18
GPA: 4
WE: Human Resources (Human Resources)

### Show Tags

27 Dec 2013, 09:44
In my opinion the answer is clearly D.

Kudos [?]: 149 [0], given: 70

Re: mammoth's teeth   [#permalink] 27 Dec 2013, 09:44
Display posts from previous: Sort by