Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 Oct 2014, 04:18

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Each December 31 in Country Q, a tally is made of the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 08 Nov 2008
Posts: 307
Followers: 2

Kudos [?]: 48 [0], given: 7

Each December 31 in Country Q, a tally is made of the [#permalink] New post 12 Feb 2010, 04:14
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

30% (01:08) correct 70% (01:32) wrong based on 14 sessions
Each December 31 in Country Q, a tally is made of
the country’s total available coal supplies—that is,
the total amount of coal that has been mined
throughout the country but not consumed. In 1991
that amount was considerably lower than it had been
in 1990. Furthermore, Country Q has not imported or
exported coal since 1970.
If the statements above are true, which one of the
following must also be true on the basis of them?
(A) In Country Q, more coal was mined in 1990 than
was mined in 1991.
(B) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
mined in 1991.
(C) In Country Q, the amount of coal consumed in
1990 was greater than the amount of coal
consumed in 1991.
(D) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
consumed in 1990.
(E) In Country Q, more coal was consumed during
the first half of 1991 than was consumed
during the first half of 1990.
_________________

"CEO in making"

Intern
Intern
avatar
Joined: 19 Dec 2009
Posts: 37
Followers: 0

Kudos [?]: 10 [0], given: 8

Re: LSAT CR : Country Q Coal [#permalink] New post 12 Feb 2010, 04:27
B.
Manager
Manager
avatar
Joined: 10 Feb 2010
Posts: 195
Followers: 2

Kudos [?]: 40 [0], given: 6

Re: LSAT CR : Country Q Coal [#permalink] New post 12 Feb 2010, 19:28
D) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
consumed in 1990.


what is OA?
Senior Manager
Senior Manager
avatar
Joined: 25 Jul 2009
Posts: 331
Followers: 1

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

Re: LSAT CR : Country Q Coal [#permalink] New post 12 Feb 2010, 22:45
Though the OA is B, the question is confusing; Even A can be true
Intern
Intern
avatar
Joined: 19 Dec 2009
Posts: 37
Followers: 0

Kudos [?]: 10 [0], given: 8

Re: LSAT CR : Country Q Coal [#permalink] New post 13 Feb 2010, 04:00
angel2009 wrote:
Though the OA is B, the question is confusing; Even A can be true



Can be true = false.

We are looking for must be true :)
Tuck Thread Master
User avatar
Joined: 20 Aug 2009
Posts: 312
Location: Tbilisi, Georgia
Schools: Stanford (in), Tuck (WL), Wharton (ding), Cornell (in)
Followers: 12

Kudos [?]: 93 [0], given: 69

Re: LSAT CR : Country Q Coal [#permalink] New post 13 Feb 2010, 07:19
I agree with (B)
Manager
Manager
avatar
Joined: 18 Oct 2009
Posts: 53
Location: Alberta, Canada
Schools: Queen's E-MBA
Followers: 0

Kudos [?]: 16 [0], given: 7

Re: LSAT CR : Country Q Coal [#permalink] New post 13 Feb 2010, 19:30
angel2009 wrote:
Though the OA is B, the question is confusing; Even A can be true


I do not see any relevance of any of the options. This argument is about a 'delta'. The delta being coal mined minus coal consumed. So change in either of these 2 factors for the years 1990 and 1991 will cause the delta to move upward or downward. Neither of these options can be an answer since there are four factors which are influencing the delta.

Am i missing something? pls comment
_________________



Please give KUDOS if you like the post

Intern
Intern
avatar
Joined: 01 Feb 2010
Posts: 34
Followers: 1

Kudos [?]: 17 [0], given: 12

Re: LSAT CR : Country Q Coal [#permalink] New post 14 Feb 2010, 12:53
tenaman10 wrote:
Each December 31 in Country Q, a tally is made of
the country’s total available coal supplies—that is,
the total amount of coal that has been mined
throughout the country but not consumed. In 1991
that amount was considerably lower than it had been
in 1990. Furthermore, Country Q has not imported or
exported coal since 1970.
If the statements above are true, which one of the
following must also be true on the basis of them?
(A) In Country Q, more coal was mined in 1990 than
was mined in 1991.
(B) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
mined in 1991.
(C) In Country Q, the amount of coal consumed in
1990 was greater than the amount of coal
consumed in 1991.
(D) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
consumed in 1990.
(E) In Country Q, more coal was consumed during
the first half of 1991 than was consumed
during the first half of 1990.

This is indeed a tough question. But only B will make sense.

We need a statement where 'delta' i.e. production-consumption for 1990 is confirmed higher than that of 1991 i.e. delta(1990)> delta(1991).

A says that more coal was mined in 1990 than in 1991. But if the consumption was also more than that of 1991 then the 'delta' could be possibly lower than that of 1991.

C says that consumption of 1990 > consumption of 1991. But still no production figures are given. There could be a possibility that production for both the years was same. In that case delta(1990)< delta(1991).

D says that consumption(1991)> consumption(1990). Here again the production figures are not provided. What if production(1991) was much higher than that of production(1990). This would mean delta(1990)< delta(1991).

E is totally out of scope.

Only B makes sense. Why? Because, there was no import or export & if consumption(1991)>production(1991) then that implies that delta(1991)<0 i.e. -ve, because delta = prod - cons.

If delta is -ve & no imports were made then where did the extra coal came from? It came from the last years left over stock i.e. delta(1990). And if there were stocks left unconsumed in 1990 then that means that delta(1991)>0 i.e. +ve.

Now, Delta(1990)>0 & delta(1991)<0. Therefore, Delta(1990)>delta(1991). Hence, Proved. There is no other way in which Country Q consumed more than it produced.
Manager
Manager
avatar
Joined: 18 Oct 2009
Posts: 53
Location: Alberta, Canada
Schools: Queen's E-MBA
Followers: 0

Kudos [?]: 16 [0], given: 7

Re: LSAT CR : Country Q Coal [#permalink] New post 14 Feb 2010, 14:12
honeyrai wrote:
tenaman10 wrote:

Only B makes sense. Why? Because, there was no import or export & if consumption(1991)>production(1991) then that implies that delta(1991)<0 i.e. -ve, because delta = prod - cons.

If delta is -ve & no imports were made then where did the extra coal came from? It came from the last years left over stock i.e. delta(1990). And if there were stocks left unconsumed in 1990 then that means that delta(1991)>0 i.e. +ve.

Now, Delta(1990)>0 & delta(1991)<0. Therefore, Delta(1990)>delta(1991). Hence, Proved. There is no other way in which Country Q consumed more than it produced.


Brilliant analysis.....it's not a purely verbal question!

But can this be solved in 1.30 mins? I would better skip this (i.e. guess an answer) and proceed. :wink:
Intern
Intern
avatar
Joined: 19 Dec 2009
Posts: 37
Followers: 0

Kudos [?]: 10 [0], given: 8

Re: LSAT CR : Country Q Coal [#permalink] New post 14 Feb 2010, 14:31
siddhartho wrote:
Brilliant analysis.....it's not a purely verbal question!

But can this be solved in 1.30 mins? I would better skip this (i.e. guess an answer) and proceed. :wink:



Sure it can, less even. You don't have to do any math or draw up any formulas/diagrams as the whole questions revolves around a singular concept (delta). Once the concept is found the wrong answers are ruled out very quickly.

People on LSAT do it :D

The stimulus clearly shows a negative delta and an answer has to fit it. All answers besides B don't have to be true for the delta to hold, only B must be true.
Manager
Manager
avatar
Joined: 26 Nov 2009
Posts: 178
Followers: 3

Kudos [?]: 53 [0], given: 5

GMAT ToolKit User
Re: LSAT CR : Country Q Coal [#permalink] New post 16 Feb 2010, 01:52
I would go for B
SVP
SVP
avatar
Joined: 16 Jul 2009
Posts: 1634
Schools: CBS
WE 1: 4 years (Consulting)
Followers: 31

Kudos [?]: 279 [0], given: 2

Re: LSAT CR : Country Q Coal [#permalink] New post 04 Jul 2010, 11:48
honeyrai wrote:
tenaman10 wrote:
Each December 31 in Country Q, a tally is made of
the country’s total available coal supplies—that is,
the total amount of coal that has been mined
throughout the country but not consumed. In 1991
that amount was considerably lower than it had been
in 1990. Furthermore, Country Q has not imported or
exported coal since 1970.
If the statements above are true, which one of the
following must also be true on the basis of them?
(A) In Country Q, more coal was mined in 1990 than
was mined in 1991.
(B) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
mined in 1991.
(C) In Country Q, the amount of coal consumed in
1990 was greater than the amount of coal
consumed in 1991.
(D) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
consumed in 1990.
(E) In Country Q, more coal was consumed during
the first half of 1991 than was consumed
during the first half of 1990.

This is indeed a tough question. But only B will make sense.

We need a statement where 'delta' i.e. production-consumption for 1990 is confirmed higher than that of 1991 i.e. delta(1990)> delta(1991).

A says that more coal was mined in 1990 than in 1991. But if the consumption was also more than that of 1991 then the 'delta' could be possibly lower than that of 1991.

C says that consumption of 1990 > consumption of 1991. But still no production figures are given. There could be a possibility that production for both the years was same. In that case delta(1990)< delta(1991).

D says that consumption(1991)> consumption(1990). Here again the production figures are not provided. What if production(1991) was much higher than that of production(1990). This would mean delta(1990)< delta(1991).

E is totally out of scope.

Only B makes sense. Why? Because, there was no import or export & if consumption(1991)>production(1991) then that implies that delta(1991)<0 i.e. -ve, because delta = prod - cons.

If delta is -ve & no imports were made then where did the extra coal came from? It came from the last years left over stock i.e. delta(1990). And if there were stocks left unconsumed in 1990 then that means that delta(1991)>0 i.e. +ve.

Now, Delta(1990)>0 & delta(1991)<0. Therefore, Delta(1990)>delta(1991). Hence, Proved. There is no other way in which Country Q consumed more than it produced.


This is crazy..i dont follow you...
_________________

The sky is the limit
800 is the limit


Get the best GMAT Prep Resources with GMAT Club Premium Membership

SVP
SVP
avatar
Joined: 16 Jul 2009
Posts: 1634
Schools: CBS
WE 1: 4 years (Consulting)
Followers: 31

Kudos [?]: 279 [0], given: 2

Re: LSAT CR : Country Q Coal [#permalink] New post 04 Jul 2010, 11:57
honeyrai wrote:
tenaman10 wrote:
Each December 31 in Country Q, a tally is made of
the country’s total available coal supplies—that is,
the total amount of coal that has been mined
throughout the country but not consumed. In 1991
that amount was considerably lower than it had been
in 1990. Furthermore, Country Q has not imported or
exported coal since 1970.
If the statements above are true, which one of the
following must also be true on the basis of them?
(A) In Country Q, more coal was mined in 1990 than
was mined in 1991.
(B) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
mined in 1991.
(C) In Country Q, the amount of coal consumed in
1990 was greater than the amount of coal
consumed in 1991.
(D) In Country Q, the amount of coal consumed in
1991 was greater than the amount of coal
consumed in 1990.
(E) In Country Q, more coal was consumed during
the first half of 1991 than was consumed
during the first half of 1990.

This is indeed a tough question. But only B will make sense.

We need a statement where 'delta' i.e. production-consumption for 1990 is confirmed higher than that of 1991 i.e. delta(1990)> delta(1991).

A says that more coal was mined in 1990 than in 1991. But if the consumption was also more than that of 1991 then the 'delta' could be possibly lower than that of 1991.

C says that consumption of 1990 > consumption of 1991. But still no production figures are given. There could be a possibility that production for both the years was same. In that case delta(1990)< delta(1991).

D says that consumption(1991)> consumption(1990). Here again the production figures are not provided. What if production(1991) was much higher than that of production(1990). This would mean delta(1990)< delta(1991).

E is totally out of scope.

Only B makes sense. Why? Because, there was no import or export & if consumption(1991)>production(1991) then that implies that delta(1991)<0 i.e. -ve, because delta = prod - cons.

If delta is -ve & no imports were made then where did the extra coal came from? It came from the last years left over stock i.e. delta(1990). And if there were stocks left unconsumed in 1990 then that means that delta(1991)>0 i.e. +ve.

Now, Delta(1990)>0 & delta(1991)<0. Therefore, Delta(1990)>delta(1991). Hence, Proved. There is no other way in which Country Q consumed more than it produced.


OK, i agree. However, I think that B can be true (in the scenario you have pointed out), but but is not necessary to be true.
For example:

1990:
Production=11
Consumed=1
Delta=11
1991:
Production=7
Consumed=4
Delta=3

Delta(1990)>Delta(1991) without B being true.

Could anybody clarify?
Thanks,
_________________

The sky is the limit
800 is the limit


Get the best GMAT Prep Resources with GMAT Club Premium Membership

Senior Manager
Senior Manager
avatar
Joined: 23 May 2010
Posts: 443
Followers: 5

Kudos [?]: 34 [0], given: 112

Re: LSAT CR : Country Q Coal [#permalink] New post 31 Jul 2010, 20:40
b
Manager
Manager
avatar
Joined: 21 Jul 2010
Posts: 57
Location: currently in Taiwan
Schools: Top Taiwanese university
Followers: 1

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

Re: LSAT CR : Country Q Coal [#permalink] New post 01 Aug 2010, 06:15
it's easy


available in 1990>available 1991
which means the consumption of coal in 1991 exceeds the mining(production) of it.
Manager
Manager
avatar
Joined: 08 Jan 2010
Posts: 194
Followers: 1

Kudos [?]: 2 [0], given: 13

Re: LSAT CR : Country Q Coal [#permalink] New post 01 Aug 2010, 19:43
went for B .......agree with Honeyrai
Manager
Manager
avatar
Joined: 04 Feb 2010
Posts: 64
Schools: IESE '13
WE 1: Engineer
Followers: 3

Kudos [?]: 10 [0], given: 0

Re: LSAT CR : Country Q Coal [#permalink] New post 04 Aug 2010, 22:33
Noboru - you're assuming that the amount of coal available starts from zero at the beginning of each year. In that case, the amount of coal produced would ALWAYS be larger than the amount consumed. However, the question just says the total coal supplies. Well, If we started 1991 X coal supplies (x /= 0 ) then we need to get a number smaller than x. The only way that is possible if the amount consumed is larger than the amount mined for that year.
Current Student
User avatar
Affiliations: Volunteer Operation Smile India, Creative Head of College IEEE branch (2009-10), Chief Editor College Magazine (2009), Finance Head College Magazine (2008)
Joined: 25 Jul 2010
Posts: 471
Location: India
WE2: Entrepreneur (E-commerce - The Laptop Skin Vault)
Concentration: Marketing, Entrepreneurship
GMAT 1: 710 Q49 V38
WE: Marketing (Other)
Followers: 12

Kudos [?]: 85 [0], given: 24

GMAT ToolKit User
Re: LSAT CR : Country Q Coal [#permalink] New post 12 Sep 2010, 02:48
HOw do you know that more was consumed than was mined there is no info about mined coal at all in both years only abt coal not consumed
_________________

Kidchaos

http://www.laptopskinvault.com

Follow The Laptop Skin Vault on:
Facebook: http://www.facebook.com/TheLaptopSkinVault
Twitter: http://www.twitter.com/LaptopSkinVault

Consider Kudos if you think the Post is good
Unless someone like you cares a whole awful lot. Nothing is going to change. It's not. - Dr. Seuss

Re: LSAT CR : Country Q Coal   [#permalink] 12 Sep 2010, 02:48
    Similar topics Author Replies Last post
Similar
Topics:
Each December 31 in Country Q, a tally is made of the gmatcrook 8 29 Aug 2006, 18:00
Each December 31 in Country Q, a tally is made of the jdtomatito 8 01 Oct 2005, 04:52
Each December 31 in Country Q, a tally is made of the cybera 2 11 Jul 2005, 18:47
Each December 31 in Country Q, a tally is made of the MA 9 11 May 2005, 21:51
Each December 31 in Country Q, a tally is made of the chunjuwu 11 14 Apr 2005, 06:01
Display posts from previous: Sort by

Each December 31 in Country Q, a tally is made of the

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.