Last visit was: 21 May 2024, 14:10 It is currently 21 May 2024, 14:10
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
SORT BY:
Date
Tags:
Show Tags
Hide Tags
Current Student
Joined: 31 Jul 2017
Status:He came. He saw. He conquered. -- Going to Business School -- Corruptus in Extremis
Posts: 1732
Own Kudos [?]: 5781 [13]
Given Kudos: 3079
Location: United States (MA)
Concentration: Finance, Economics
Send PM
Intern
Intern
Joined: 30 May 2019
Posts: 3
Own Kudos [?]: 2 [1]
Given Kudos: 8
Send PM
Manager
Manager
Joined: 18 Aug 2017
Posts: 117
Own Kudos [?]: 38 [0]
Given Kudos: 599
Send PM
Senior Manager
Senior Manager
Joined: 17 Aug 2018
Posts: 349
Own Kudos [?]: 313 [0]
Given Kudos: 254
Location: United States
WE:General Management (Other)
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
I don't get why B is better than E. The prompt says that Senegalese gold was never refined for coin production, and this is answer choice E.
Veritas Prep GMAT Instructor
Joined: 01 May 2019
Posts: 45
Own Kudos [?]: 433 [3]
Given Kudos: 1
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
3
Kudos
Expert Reply
mykrasovski wrote:
I don't get why B is better than E. The prompt says that Senegalese gold was never refined for coin production, and this is answer choice E.


If answer choice E said that Senegalese gold was never refined for coin production, it would be a valid inference ... but that isn't what answer choice E says. E doesn't say that Senegalese gold was never refined for coin production; it says that non-Senegalese gold was always refined for coin production. This can't be found anywhere in the passage. It's distinctly possible that other gold (although somewhat less pure than Senegalese gold) could still be used to mint coins — maybe a gold content of 90 or 91% would still be pure enough not to need refining. We just don't know, so E doesn't have to be true.

Correct answers for Inference questions (like this one) must be 100% true given the information in the passage, so it's extremely important to read the answer choices carefully. If we misread or make assumptions about what the answer choices say, we're likely to miss the question.
Senior Manager
Senior Manager
Joined: 17 Aug 2018
Posts: 349
Own Kudos [?]: 313 [1]
Given Kudos: 254
Location: United States
WE:General Management (Other)
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
VeritasPrepErika wrote:
mykrasovski wrote:
I don't get why B is better than E. The prompt says that Senegalese gold was never refined for coin production, and this is answer choice E.


If answer choice E said that Senegalese gold was never refined for coin production, it would be a valid inference ... but that isn't what answer choice E says. E doesn't say that Senegalese gold was never refined for coin production; it says that non-Senegalese gold was always refined for coin production. This can't be found anywhere in the passage. It's distinctly possible that other gold (although somewhat less pure than Senegalese gold) could still be used to mint coins — maybe a gold content of 90 or 91% would still be pure enough not to need refining. We just don't know, so E doesn't have to be true.

Correct answers for Inference questions (like this one) must be 100% true given the information in the passage, so it's extremely important to read the answer choices carefully. If we misread or make assumptions about what the answer choices say, we're likely to miss the question.


Hi Erika, thanks much for addressing my question. After reading the prompt today and thinking very thoroughly, I totally understand why E is not a good option. The passage says that "most gold coins were minted from Senegalese gold which had high quality", and one can conclude that there could possibly be other sources of gold and there are no data about the quality of the gold from those hypothetical regions. So, it is possible that there was a region (or even a few) which had high quality gold that did not have to be refined, i.e. it was comparable to gold from Senegal. So, E could be true but does not necessarily have to be true. Is my reasoning correct?

I also realized that E is overly strong because of "the only" language. Generally, strong statements tend to be good answer choices for Weaken / Strengthen questions, but not for Assumption & Inference questions. So, one at least should be suspicious about option E in this particular question. Would you generally agree with my observations?
Veritas Prep GMAT Instructor
Joined: 01 May 2019
Posts: 45
Own Kudos [?]: 433 [2]
Given Kudos: 1
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
2
Kudos
Expert Reply
mykrasovski wrote:
VeritasPrepErika wrote:
mykrasovski wrote:
I don't get why B is better than E. The prompt says that Senegalese gold was never refined for coin production, and this is answer choice E.


If answer choice E said that Senegalese gold was never refined for coin production, it would be a valid inference ... but that isn't what answer choice E says. E doesn't say that Senegalese gold was never refined for coin production; it says that non-Senegalese gold was always refined for coin production. This can't be found anywhere in the passage. It's distinctly possible that other gold (although somewhat less pure than Senegalese gold) could still be used to mint coins — maybe a gold content of 90 or 91% would still be pure enough not to need refining. We just don't know, so E doesn't have to be true.

Correct answers for Inference questions (like this one) must be 100% true given the information in the passage, so it's extremely important to read the answer choices carefully. If we misread or make assumptions about what the answer choices say, we're likely to miss the question.


Hi Erika, thanks much for addressing my question. After reading the prompt today and thinking very thoroughly, I totally understand why E is not a good option. The passage says that "most gold coins were minted from Senegalese gold which had high quality", and one can conclude that there could possibly be other sources of gold and there are no data about the quality of the gold from those hypothetical regions. So, it is possible that there was a region (or even a few) which had high quality gold that did not have to be refined, i.e. it was comparable to gold from Senegal. So, E could be true but does not necessarily have to be true. Is my reasoning correct?

I also realized that E is overly strong because of "the only" language. Generally, strong statements tend to be good answer choices for Weaken / Strengthen questions, but not for Assumption & Inference questions. So, one at least should be suspicious about option E in this particular question. Would you generally agree with my observations?


Solid reasoning! I also like that you're looking out for extreme language — and "only" is a really classic example. Should we rule an answer out immediately because of extreme language? No. Sometimes extreme things are true. But we shouldn't give it any more attention until we've ruled out less extreme, more plausible answer choices. This will save us from wasting time and mental energy on wrong answer choices and accidentally convincing ourselves of something that isn't likely to be true.
Manager
Manager
Joined: 17 Jan 2016
Status:As cheeks from my insta feed say: soon...
Posts: 68
Own Kudos [?]: 20 [0]
Given Kudos: 144
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
nightblade354 wrote:
Numismatist: In medieval Spain, most gold coins were minted from gold mined in West Africa, in the area that is now Senegal. The gold mined in this region was the purest known. Its gold content of 92 percent allowed coins to be minted without refining the gold, and indeed coins minted from this source of gold can be recognized because they have that gold content. The mints could refine gold and produced other kinds of coins that had much purer gold content, but the Senegalese gold was never refined.

Which one of the following inferences about gold coins minted in medieval Spain is most strongly supported by the information the numismatist gives?

(A) Coins minted from Senegalese gold all contained the same weight, as well as the same proportion of gold
(B) The source of some refined gold from which coins were minted was unrefined gold with a gold content of less than 92 percent
(C) Two coins could have the same monetary value even though they differed from each other in the percentage of gold they contained
(D) No gold coins were minted that had a gold content of less than 92 percent
(E) The only unrefined gold from which coins could be minted was Senegalese gold


Hello everyone,

I rejected B because most can mean all as well (I learned this in e-gmat, though I still don't understand why), and the last sentence says the mints COULD refine and produce OTHER KINDS OF COINS (it doesn't say they did refine)

Can anyone make all the staff above clear for me?
Manager
Manager
Joined: 19 Sep 2017
Posts: 220
Own Kudos [?]: 151 [0]
Given Kudos: 160
Location: United Kingdom
GPA: 3.9
WE:Account Management (Other)
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
Hi nurba92 ,
Most is >50% but <100%.
Having said that, most, but not all, coins in medieval Spain were made from gold mined from Senegal. That means, there was still some % of coins made from gold that was not from Senegal, irrespective of what gold content they had.
Now, lets look at the choices.
A is easy to reject as weight of a coin is not mentioned in the argument.
B does align with our argument. Keep it as a contender for now.
C talks about value of two different coins. Again, it’s not mentioned anywhere in the given argument. Incorrect.
D Whether or not gold coins were minted if the gold content was less than 92% is not given in the argument. We could only say certain thing about MOST of the coins, such as good content in those that were minted from Senegalese gold. Nothing more than that. incorrect.
E Now, making such a statement that Senegalese gold was the ONLY gold that did not need any refining is a strong statement and we cannot make such a statement unless it is given that no other gold had such purity level as Senegalese that it did not need to be refined.
So, B is the only statement that has a proof of being 100% correct.
Hence, B is the winner.
Hope this helps.

Posted from my mobile device
Manager
Manager
Joined: 17 Jan 2016
Status:As cheeks from my insta feed say: soon...
Posts: 68
Own Kudos [?]: 20 [0]
Given Kudos: 144
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
Doer01 wrote:
Hi nurba92 ,
Most is >50% but <100%.
Having said that, most, but not all, coins in medieval Spain were made from gold mined from Senegal.

Posted from my mobile device


Doer01,
In the stimulus, there is no mention of "not all". And as I said, I still don't understand why most can mean all, but e-gmat says so (since they are way more experienced, I memorized this staff)
Can you tell me is there any way how we can infer "all" from "most" or it is totally incorrect?
Thanks
Manager
Manager
Joined: 19 Sep 2017
Posts: 220
Own Kudos [?]: 151 [0]
Given Kudos: 160
Location: United Kingdom
GPA: 3.9
WE:Account Management (Other)
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
nurba92 wrote:
Doer01 wrote:
Hi nurba92 ,
Most is >50% but <100%.
Having said that, most, but not all, coins in medieval Spain were made from gold mined from Senegal.

Posted from my mobile device


Doer01,
In the stimulus, there is no mention of "not all". And as I said, I still don't understand why most can mean all, but e-gmat says so (since they are way more experienced, I memorized this staff)
Can you tell me is there any way how we can infer "all" from "most" or it is totally incorrect?
Thanks


Hi nurba92,
"but not all" is something that could be inferred when "most" is used. That's why I had put inside a comma pair.
Second, Most cannot mean all as both are different quantity markers according to CR Bible. I took e-gmat course too and I do not remember most being translated to all.
Manager
Manager
Joined: 17 Jan 2016
Status:As cheeks from my insta feed say: soon...
Posts: 68
Own Kudos [?]: 20 [0]
Given Kudos: 144
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
nightblade354 wrote:
Numismatist: In medieval Spain, most gold coins were minted from gold mined in West Africa, in the area that is now Senegal. The gold mined in this region was the purest known. Its gold content of 92 percent allowed coins to be minted without refining the gold, and indeed coins minted from this source of gold can be recognized because they have that gold content. The mints could refine gold and produced other kinds of coins that had much purer gold content, but the Senegalese gold was never refined.

Which one of the following inferences about gold coins minted in medieval Spain is most strongly supported by the information the numismatist gives?

(A) Coins minted from Senegalese gold all contained the same weight, as well as the same proportion of gold
(B) The source of some refined gold from which coins were minted was unrefined gold with a gold content of less than 92 percent
(C) Two coins could have the same monetary value even though they differed from each other in the percentage of gold they contained
(D) No gold coins were minted that had a gold content of less than 92 percent
(E) The only unrefined gold from which coins could be minted was Senegalese gold


Guys,
If most means 51-99%, its logical opposite is 50% or less, but what about 100% in this very case? (I don't mean 100% is all staff, I mean that when considering "most", 100% is absent both in itself and in its logical opposite)
Thanks
Manager
Manager
Joined: 24 Sep 2015
Posts: 71
Own Kudos [?]: 83 [0]
Given Kudos: 79
Location: Spain
Concentration: Strategy, Entrepreneurship
GPA: 3.9
WE:Management Consulting (Consulting)
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
This is an inference question, so let's try to find so inferences that are not explicitly stated in the argument before jumping into the options. This is just to help us think about the argument

1ºPremise: Coins were minted in Senegal
2ºPremise: Gold from Senegal purest known --> 92% (no need of refinining coins) --> cold recognizable
3ºPremise: Possible to produce coins >92% gold. Senegalese coin never refined
Possible gaps:

- Coins in Spain can't have >92% of gold without refinement
- Not all coins in Spain are made out of African gold (it says most)
- Coins in Spain with 92% of gold are recognizable


Let's check answer now:

(A) Coins minted from Senegalese gold all contained the same weight, as well as the same proportion of gold

Same weight? Coin weight is never discussed. Incorrect

(B) The source of some refined gold from which coins were minted was unrefined gold with a gold content of less than 92 percent

This is indeed possible because it says that "most" of the coins were made ut of African gold. So that means, some others are not and this means that the unrefined gold is coming from sources with <92%. Correct

(C) Two coins could have the same monetary value even though they differed from each other in the percentage of gold they contained

This is possible but we can't definitely infer this from the argument. Incorrect

(D) No gold coins were minted that had a gold content of less than 92 percent

Not true. It can have 92% and even more if refined and less than 92% tooIncorrect

(E) The only unrefined gold from which coins could be minted was Senegalese gold

Again not true. There may be other coins with unrefined gold coming from another source. But these coins will have less than 92% of gold for sure. Incorrect

OPTION B

Originally posted by garcmillan on 07 Sep 2019, 11:46.
Last edited by garcmillan on 07 Sep 2019, 12:03, edited 1 time in total.
Intern
Intern
Joined: 28 Jul 2019
Posts: 1
Own Kudos [?]: 3 [0]
Given Kudos: 4
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
Explanation why B is correct:- If you read carefully segnegal gold is "PUREST" and its gold content is 92%.It means other mines will be producing less than 92% purity Gold.So, B is correct.

Posted from my mobile device
User avatar
Non-Human User
Joined: 01 Oct 2013
Posts: 17351
Own Kudos [?]: 851 [0]
Given Kudos: 0
Send PM
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
Re: Numismatist: In medieval Spain, most gold coins were minted from gold [#permalink]
Moderators:
GMAT Club Verbal Expert
6936 posts
GMAT Club Verbal Expert
238 posts
CR Forum Moderator
832 posts