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A bullet train travels in excess of 150 miles per hour. Therefore, if

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A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 18 Nov 2012, 13:51
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A bullet train travels in excess of 150 miles per hour. Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train.

Which of the following most closely parallels the reasoning used in the argument above?


(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange

(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person.

(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above

(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.

(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used.
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 18 Nov 2012, 14:48
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Hi gmatchase,

Happy to help. Here is my reasoning and thinking as I went through this question....

A bullet train travels in excess of 150 miles per hour. Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train.

Ok. So argument is the definition of a bullet train is it goes faster than 150mph

Which of the following most closely parallels the reasoning used in the argument above?

So we are interested in the format of the argument. We don't actually care about the content. If we look at the argument it is of the form. XXXX (Bullet train) is defined by YYYY (150mph). So if YYYY (150mph is not present it is not XXXXX (a bullet train). Which of the below is like that....

(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange.Quite easy to dismiss. This sentence is nonsense. Firstly it says oranges ripen on the vine. Then says if it ripens on the vine it's not an orange.
(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person. nope. This is both wrong in style 'often' means we're not definite like we were before. It also isn't a logical conclusion of the first sentence that the second is true
(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or aboveYes this seems to work. Massive damage is above 5.0. If not above 5.0 no massive damage.
(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.A tempting one...However this has the argument the other way around. It says X is defined by Y. So if not X then Y
(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used.Nope. Fluroride 'often' so not always.
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 18 Nov 2012, 17:17
gmatchase wrote:
A bullet train travels in excess of 150 miles per hour. Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train.

Which of the following most closely parallels the reasoning used in the argument above?

(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange
(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person.
(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above
(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.
(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used.

Please answer with explanation


Logical flow of given statement is : A does B. Therefore if C doesnt do B, it is not A.

Out of given choices, only choice C could be written in same form.

Ans C it is!
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 23 Apr 2014, 08:12
Let's analyze this for a second. So in stimulus we have something along these lines: If x then Y, If not X then not Y

Actually just be looking really quickly at the given answer choices I have only two contenders which is good. C and D

Now then, watch out for answer choice D which expreses something similar but not quite. It says that if X then Y if not X then not Y. BUT here's the catch. Instead of below mach 3 it should say below or equal to match 3, because that's the exact opposite of above Mach 3. Since we are missing that equal argument is wrong

Even though I'm not a huge fan of answer choice C since it somewhat reverses the argument (It says if X then Y if Not Y then not X) I would still consider it a valid answer choice and thus the correct answer

Hope this helps
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 08 Jan 2016, 03:14
Can somebody please clarify difference between option C & D?
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 08 Jan 2016, 03:40
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Hi,
although we can eliminate choice visually, but if in doubt , break it into parts..

lets see the reasoning in the main Q..

A bullet train travels in excess of 150 miles per hour. Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train.
Which of the following most closely parallels the reasoning used in the argument above?
let bullet train be A and >150 miles per hour be B..
so the reasoning is..
A does B. If something does below B, it will not be A...


Since you want to know about C and D, we will restrict to them..

C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above.
let earthquake above 5 be A and massive damage be B...
then A does B. If not B, it is not A..
similar to what we are looking for...CORRECT

D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.
Let supersonic plane be A and speeds>mach1 be B..
then A does B. If it is not A, then it will not do B.
the reasoning is not the same. so incorrect

Hope it helps
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 01 Mar 2016, 05:52
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This question is in the form of

A does X. If B doesn't do X, B is not A.

Among the options,

only C fits the statement

A = earthquake of 5 and above
B = another earthquake
X = massive damage
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 01 Mar 2016, 11:42
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X > Y. If X < Y then it is not X. We have to choose a similar reasoning

(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange. - Incorrect - X --> Y. If Y then not X. We are not looking for this.

(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person. - Incorrect - X > 1. So Y > 1. Wrong choice.

(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above. - Correct - X > Y. If no Y then no X < Y. This has to be our answer.

(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1. - Incorrect - X > Y. If not Z then X < Y. Supersonic is a third variable Z. So its a wrong choice.

(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used. - Incorrect - If X then no Y. If no Y then no X - Self contradicting statement.

IMO answer is C.
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 11 Jan 2017, 03:33
A bullet train travels in excess of 150 miles per hour. Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train.

Which of the following most closely parallels the reasoning used in the argument above?

Premise: A bullet train travels in excess of 150 miles per hour : P -> Q
Conclusion : Therefore, if a train travels slower than 150 miles per hour, it is not a bullet train. : ~Q -> ~P

(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange.
P -> Q | Q -> ~P X

(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person.
Conslusion brings in another entity not present in the premise.
X
(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above.

(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.
P -> Q | ~P -> ~Q X

(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used.
P -> Q | Q -> ~P X

Option C.
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 28 May 2017, 14:17
(A) An orange ripens only on the vine. If it ripens on the vine, then it is not an orange
(B) Newspapers are often read by more than one person. Therefore, magazines are also likely to be read by more than one person.
(C) An earthquake of 5.0 or above on the Richter scale causes massive damage. If there is not massive damage, then the earthquake did not attain a 5.0 or above
(D) A supersonic plane travels at speeds in excess of Mach 1. If it is not supersonic, then it will travel at speeds below Mach 1.
(E) Fluoride generally prevents cavities. If there are no cavities, then there was no fluoride used.
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if  [#permalink]

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New post 29 Nov 2019, 03:08
do these kind of questions even come on the gmat? so far i havent found them ever in my test prep materials
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Re: A bullet train travels in excess of 150 miles per hour. Therefore, if   [#permalink] 29 Nov 2019, 03:08
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