Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 23 May 2017, 17:55

### 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

# Determining the authenticity of purported pre-Columbian

Author Message
TAGS:

### Hide Tags

Manager
Joined: 20 Nov 2010
Posts: 221
Followers: 4

Kudos [?]: 32 [0], given: 38

### Show Tags

10 Aug 2011, 07:59
Tough one.
_________________

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
MGMAT 6 650 (51,31) on 31/8/11
MGMAT 1 670 (48,33) on 04/9/11
MGMAT 2 670 (47,34) on 07/9/11
MGMAT 3 680 (47,35) on 18/9/11
GMAT Prep1 680 ( 50, 31) on 10/11/11

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CR notes
http://gmatclub.com/forum/massive-collection-of-verbal-questions-sc-rc-and-cr-106195.html#p832142
http://gmatclub.com/forum/1001-ds-questions-file-106193.html#p832133
http://gmatclub.com/forum/gmat-prep-critical-reasoning-collection-106783.html
http://gmatclub.com/forum/how-to-get-6-0-awa-my-guide-64327.html
http://gmatclub.com/forum/how-to-get-6-0-awa-my-guide-64327.html?hilit=chineseburned

Senior Manager
Joined: 16 Feb 2011
Posts: 259
Followers: 4

Kudos [?]: 162 [0], given: 9

### Show Tags

10 Aug 2011, 08:41

btw can anyone help me understand the technique of solving such questions which require reference to other stuff..(thgh um nt expecting any revert but it wld b nice to have a help)
Manager
Joined: 14 Mar 2011
Posts: 85
Followers: 1

Kudos [?]: 43 [1] , given: 21

### Show Tags

10 Aug 2011, 12:00
1
KUDOS
One More D
Manager
Joined: 25 Jun 2008
Posts: 128
Concentration: General Management, Technology
Followers: 3

Kudos [?]: 26 [0], given: 5

### Show Tags

10 Aug 2011, 14:37
amitjash wrote:
tough one...
I have one question ... how you will distiguish between the grinding on axe by nature and by its use (as it is an axe)??? I have doubt

The problem with this one is the potential is there that the axe was never used. Even if it was though, the gridding marks from an earthquake likely would be different than the striking marks during the use of the axe. While C is also a tempting answer choice as it doesn't state exactly where the object was found, D is absolutely the best answer as the cape is already black and you can't see scratches on it (bringing a microscope into the equation is bringing information way too far out of the original passage to disqualify this answer).

Manager
Joined: 11 Feb 2011
Posts: 77
Followers: 1

Kudos [?]: 2 [0], given: 0

### Show Tags

10 Aug 2011, 17:16
Senior Manager
Joined: 12 Dec 2010
Posts: 280
Concentration: Strategy, General Management
GMAT 1: 680 Q49 V34
GMAT 2: 730 Q49 V41
GPA: 4
WE: Consulting (Other)
Followers: 9

Kudos [?]: 49 [0], given: 23

### Show Tags

12 Aug 2011, 07:23
I guess Mr -T gave a good explanation, ideas was where both of the identification methods would not work! options other than D defy only one option.
_________________

My GMAT Journey 540->680->730!

~ When the going gets tough, the Tough gets going!

Manager
Joined: 01 Jan 2011
Posts: 70
Followers: 0

Kudos [?]: 0 [0], given: 2

### Show Tags

14 Aug 2011, 16:56
D

Posted from my mobile device
_________________

_________________________
Try and you will succeed !

Senior Manager
Joined: 19 Oct 2010
Posts: 262
Location: India
GMAT 1: 560 Q36 V31
GPA: 3
Followers: 7

Kudos [?]: 80 [0], given: 27

### Show Tags

04 Sep 2011, 00:58
I chose C. But good explanations here.

It should be D.
_________________

petrifiedbutstanding

Manager
Joined: 10 Jan 2011
Posts: 240
Location: India
GMAT Date: 07-16-2012
GPA: 3.4
WE: Consulting (Consulting)
Followers: 0

Kudos [?]: 63 [0], given: 25

### Show Tags

06 Sep 2011, 05:14
D nice discussion....
only option where both the criterias can't work
_________________

-------Analyze why option A in SC wrong-------

Manager
Status: Bunuel's fan!
Joined: 08 Jul 2011
Posts: 233
Followers: 1

Kudos [?]: 47 [0], given: 55

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

18 May 2012, 17:54
This one is easy D but i think the paragraph is quite long for a typical CR question. I dont think GMAT question can be that long though.
Manager
Joined: 28 May 2011
Posts: 193
Location: United States
GMAT 1: 720 Q49 V38
GPA: 3.6
WE: Project Management (Computer Software)
Followers: 2

Kudos [?]: 65 [0], given: 7

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

19 May 2012, 03:02
Right answer should not fit in either of the criteria :
- gridding (Scratch on surface) should work
- darkening (any color that can have darker shade after darkening) should work

So, D (A black feather cape) is the only one that seems right answer considering black can't get further dark and feather is so soft that it can't have any scratch on it's surface.

Having said that, this question keeps gates open for dispute as there can be darker shade of color 'Black' and even feather can have scratches if seen by microscope
_________________

-------------------------------------------------------------------------------------------------------------------------------
http://gmatclub.com/forum/a-guide-to-the-official-guide-13-for-gmat-review-134210.html
-------------------------------------------------------------------------------------------------------------------------------

Intern
Status: Looking for High GMAT Score
Joined: 19 May 2012
Posts: 36
Location: India
Concentration: Strategy, Marketing
WE: Marketing (Internet and New Media)
Followers: 0

Kudos [?]: 6 [0], given: 58

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

14 Aug 2012, 06:28
can you please tell me the source !
_________________

“The best time to plant a tree was 20 years ago. The second best time is now.” – Chinese Proverb

Manager
Joined: 23 Aug 2011
Posts: 81
Followers: 3

Kudos [?]: 222 [0], given: 13

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

14 Aug 2012, 06:36
I was able to answer correctly only after looking the dictionary for the meanings of bold words

(A) An ax head of black obsidian, unearthed from a kitchen midden
(B) A pottery bowl with a red ocher design, found in the ruins of a temple
(C) A set of gold ear weights, ornamented with jasper pendants
(D) A black feather cape from a king’s burial vault
E) A multicolored woven sash found near the gravesite of a slave

Grinding effects :-> applicable to solid objects such as pottery, ornaments ,metals etc...
darkening: applicable to those objects which are not already black or dark.
_________________

Whatever one does in life is a repetition of what one has done several times in one's life!
If my post was worth it, then i deserve kudos

Intern
Joined: 06 Mar 2012
Posts: 13
Schools: Booth '15
Followers: 0

Kudos [?]: 3 [0], given: 8

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

14 Aug 2012, 07:41
I think Darkening won't work in E as sash is multicolored and so, the darkened part could be assumed/mistaken with is multicolor nature. And as it is sash, 'gridding' too won't work.
I am sure black can be seen as darkened relative it its overall black color.

I will choose E here.

What say experts?
Manager
Joined: 14 Jun 2012
Posts: 65
Followers: 0

Kudos [?]: 13 [0], given: 1

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

29 Aug 2012, 08:25
I chose D using the POE here. My reasoning was similar to a few other responses posted above.

(A) and (D) both have black coloured artifact so darkening scenario will not work for these 2 options. So it comes down do the fact that scratches will be least helpful in resolving A or D. Here I chose D sensing that feathers might not reflect scratches. They could have been teared apart but scratches on feathers seem a rather far cry.
_________________

My attempt to capture my B-School Journey in a Blog : tranquilnomadgmat.blogspot.com

There are no shortcuts to any place worth going.

Manager
Status: exam is close ... dont know if i ll hit that number
Joined: 06 Jun 2011
Posts: 197
Location: India
GMAT Date: 10-09-2012
GPA: 3.2
Followers: 2

Kudos [?]: 25 [0], given: 1

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

29 Aug 2012, 11:04
this question looks like a riddle ratjher than a cr problem
every answer can be explained the way test taker want to

controversial stuff
_________________

just one more month for exam...

Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1672
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 103

Kudos [?]: 992 [0], given: 109

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

07 Sep 2012, 22:48
+1 D

The cape cannot show scratchs or a darkening on its surface.
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Intern
Joined: 11 Aug 2013
Posts: 1
Concentration: Marketing, Finance
GMAT 1: 560 Q47 V21
GMAT 2: 620 Q46 V29
Followers: 0

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

### Show Tags

14 Aug 2013, 02:49
Thanks
TommyWallach wrote:
Hey All,

Lots of discussion on this one. Let's see what I can do...

Determining the authenticity of purported pre-Columbian artifacts is never easy. Carbon-14 dating of these artifacts is often impossible due to contamination by radioactive palladium (which occurs naturally in the soils of Central and South America). However, historians and anthropologists have evolved two reliable criteria, which, utilized in combination, have proven effective for dating these artifacts. First, because authentic pre-Columbian artifacts characteristically occur in a coarse, granular matrix that is shifted by major earthquakes, they often exhibit the unique scratch patterns known as gridding. In addition, true pre-Columbian artifacts show a darkening in surface color that is caused by centuries of exposure to the minute amounts of magnesium in the soil of the Americas.

The criteria above would be LEAST useful in judging the authenticity of which of the following?

Breakdown. We have two methods: Check earthquake-related gridding and check for magnesium darkening. Where will these fail?

(A) An ax head of black obsidian, unearthed from a kitchen midden
PROBLEM: Darkening wouldn't work here (because it's black), but gridding would still work (obsidian is just glassy rock).

(B) A pottery bowl with a red ocher design, found in the ruins of a temple
PROBLEM: Both gridding and darkening would work here.

(C) A set of gold ear weights, ornamented with jasper pendants
PROBLEM: Both gridding and darkening would work here.

(D) A black feather cape from a king’s burial vault
ANSWER: It's black, so you can't check darkening, and it's made of feathers, so there won't be any gridding on the surface.

(E) A multicolored woven sash found near the gravesite of a slave
ANSWER: Gridding wouldn't work here (fabric), but darkening still would.

The answer is definitely D. Fun!

-tommy
Senior Manager
Joined: 15 Sep 2011
Posts: 362
Location: United States
WE: Corporate Finance (Manufacturing)
Followers: 6

Kudos [?]: 336 [0], given: 45

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

14 Aug 2013, 10:23
D

I would like to add only...

A burial vault is not the same as a buried vault. The word "burial" is an adjective pertaining to the type of vault. Whereas, if the sentence had "buried", it would describe the condition of the vault - it would be buried. I know that it's a subtle difference, but the meaning is drastically different. Answer D provides as the better answer choice - whether or not you can actually prove one or another with a microscope, etc.

In any case, at least we can say that this adjective "burial" was inserted by the author to trick test-takers..
Kaplan GMAT Instructor
Joined: 25 Aug 2009
Posts: 644
Location: Cambridge, MA
Followers: 84

Kudos [?]: 286 [0], given: 2

Re: Determining the authenticity of purported pre-Columbian [#permalink]

### Show Tags

14 Aug 2013, 16:15
gmatfighter12 wrote:
This one is easy D but i think the paragraph is quite long for a typical CR question. I dont think GMAT question can be that long though.

This post is pretty old, but it never got answered and some other folks have brought this thread back from the dead. So: yes, they can! GMAT CR questions are typically a bit shorter than this, but some of them can be long paragraphs. Flip through the Official Guide, and you'll see a few examples of textually dense passages like this one. On such passages, it's vitally important that you start with the question stem. You can't spend a long time reading the text, so you need to know what you are looking for before you dive in!

Best,
_________________

Eli Meyer
Kaplan Teacher
http://www.kaptest.com/GMAT

Prepare with Kaplan and save \$150 on a course!

Kaplan Reviews

Re: Determining the authenticity of purported pre-Columbian   [#permalink] 14 Aug 2013, 16:15

Go to page   Previous    1   2   3    Next  [ 46 posts ]

Similar topics Replies Last post
Similar
Topics:
1 Every moral theory developed in the Western tradition purports 2 20 Feb 2017, 17:01
5 A recent report determined that 8 19 Nov 2016, 17:04
9 Recently, scientists determined 7 05 Feb 2017, 16:41
4 Studies of brain lateralization in animals have purported to 5 05 Aug 2015, 21:47
2 Determining the authenticity of purported pre-Columbian 5 04 Jan 2012, 06:13
Display posts from previous: Sort by