Historically, monetary systems have developed only in population cente

Question

Historically, monetary systems have developed only in population centers with marketplaces. Through the fourth century B.C., Mesopotamian cities engaged in trade, but had never had marketplaces. By that period, however, Greek cities all had marketplaces, or agorae. The Greek cities’ agorae were centrally located and goods were traded there either for money or for commodities.

If all of the statements in the passage are true, then which one of the following must also be true?

(A) In the fourth century B.C., Greek cities were the only population centers with monetary systems.
(B) The development of monetary systems has historically led to the development of marketplaces.
(C) In the fourth century B.C., the Greeks and the Mesopotamians traded with each other.
(D) After the fourth century B.C., Mesopotamian cities had marketplaces and monetary systems.
(E) The Mesopotamian cities of the fourth century B.C. did not have monetary systems.

mikemcgarry · Answer

Dear Nahid078 , I'm happy to respond. :-)

My friend, I am going to caution you about how hard it is to write a a high quality GMAT CR practice question. You see, this question of yours has a very interesting subject matter and has one clearly right answer, (E), and four clearly wrong answers. All good. The problem is: this is a very easy question. I could predict the conclusion without any problem. The four wrong answers are wrong but aren't really distractors in any meaningful way. It's very challenging to write a GMAT CR question that has only one right answer and four wrong answers such that each one of the wrong answers is particularly tempting for someone who has not read carefully or who leaped to a quick incorrect conclusion. Here's an example of a GMAT CR practice question with much more tempting distractors: Simian Virus Does all this make sense? Mike :-)

abhi4212 · Answer

Historically, monetary systems have developed only in population centers with marketplaces. Through the fourth century B.C., Mesopotamian cities engaged in trade, but had never had marketplaces. By that period, however, Greek cities all had marketplaces, or agorae. The Greek cities’ agorae were centrally located and goods were traded there either for money or for commodities.

If all of the statements in the passage are true, then which one of the following must also be true?

(A) In the fourth century B.C., Greek cities were the  only population  centers with monetary systems.  using "only" emphasize on the fact that there were no other monetary system available at that time,not mentioned in the statement.  
(B) The development of monetary systems has historically  led to the development  of marketplaces.  opposite as per the statement 
(C) In the fourth century B.C., the Greeks and the Mesopotamians  traded with each other .  not mentioned in statement 
(D)  After the fourth century  B.C., Mesopotamian cities had marketplaces and monetary systems.  after fourth century, condition was not described in the statement 
(E) The Mesopotamian cities of the fourth century B.C. did not have monetary systems.  correct as no market places means no monetary system

abhishekdadarwal2009 · Answer

Historically, monetary systems have developed only in population centers with marketplaces. Through the fourth century B.C., Mesopotamian cities engaged in trade, but had never had marketplaces. By that period, however, Greek cities all had marketplaces, or agorae. The Greek cities’ agorae were centrally located and goods were traded there either for money or for commodities.

If all of the statements in the passage are true, then which one of the following must also be true?

(A) In the fourth century B.C., Greek cities were the only population centers with monetary systems. 
no such premise provided.
 (B) The development of monetary systems has historically led to the development of marketplaces. 
Market places ahve monetory system and not the other way,
 (C) In the fourth century B.C., the Greeks and the Mesopotamians traded with each other. 
No such premise that they traded with each other
 (D) After the fourth century B.C., Mesopotamian cities had marketplaces and monetary systems. 
No such premise provide in the argument.they may or they may not

(E) The Mesopotamian cities of the fourth century B.C. did not have monetary systems. 
Correct answer, clearly stated in the premise that mesoptamian citeis did not have monetary systems.

BLTN · Answer

the stimulus utilized conditional reasoning.
monetary systems --  Essential condition 
population centers with marketplaces --  Sufficient condition

monetary systems --> population centers with marketplaces

The following statement forms contrapositive condition. (Not B -- > Not A)

Mesopotamian cities engaged in trade, but had never had marketplaces -- >  No monetary systems

If all of the statements in the passage are true, then which one of the following must also be true?

(A) In the fourth century B.C., Greek cities were the only population centers with monetary systems. - Cannot be proved by Argument 
(B) The development of monetary systems has historically led to the development of marketplaces.  - mistake reversal, Signifies A is not lead to B directly   
(C) In the fourth century B.C., the Greeks and the Mesopotamians traded with each other.  - Cannot be proved by Argument 
(D) After the fourth century B.C., Mesopotamian cities had marketplaces and monetary systems. - Cannot be proved by Argument 
(E) The Mesopotamian cities of the fourth century B.C. did not have monetary systems. --  No Market places --> No Monetary systems

unraveled · Answer

Historically, monetary systems have developed only in population centers with marketplaces. Through the fourth century B.C., Mesopotamian cities engaged in trade, but had never had marketplaces. By that period, however, Greek cities all had marketplaces, or agorae. The Greek cities’ agorae were centrally located and goods were traded there either for money or for commodities.

If all of the statements in the passage are true, then which one of the following must also be true?

(A) In the fourth century B.C., Greek cities  were the only population centers  with monetary systems. - WRONG. Only is a problem.
(B) The development of monetary systems has historically  led to  the development of marketplaces. - WRONG. Causality reversed.
(C) In the fourth century B.C., the Greeks and the Mesopotamians  traded with each other . - WRONG. Not at all.
(D)  After the fourth century B.C ., Mesopotamian cities had marketplaces and monetary systems. - WRONG. What was there after 4th century is not inferable from passage.
(E) The Mesopotamian cities of the fourth century B.C.  did not have monetary systems . - CORRECT. Either Greek cities had monetary systems or Mesopotamian cities didn't have them. The latter is true.

Answer E.

Historically, monetary systems have developed only in population cente

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Historically, monetary systems have developed only in population cente

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615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

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Perfect 805 Score Debrief by Julia

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