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Politician: The current crisis in mathematics

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Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 08:09
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Politician: The current crisis in mathematics education must be overcome if we are to remain competitive in the global economy. Alleviating this crisis requires the employment of successful teaching methods. No method of teaching a subject can succeed that does not get students to spend a significant amount of time outside of class studying that subject. Which one of the following statements follows logically from the statements above?

(A) If students spend a significant amount of time outside of class studying mathematics, the current crisis in mathematics education will be overcome.
(B) The current crisis in mathematics education will not be overcome unless students spend a significant amount of time outside of class studying mathematics.
(C) Few subjects are as important as mathematics to the effort to remain competitive in the global economy.
(D) Only if we succeed in remaining competitive in the global economy will students spend a significant amount of time outside of class studying mathematics.
(E) Students’ spending a significant amount of time outside of class studying mathematics would help us to remain competitive in the global economy.
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 08:23
1
This question is based on logical structures.

It is saying:

If Crisis in mathematics education overcome, we will remain competitive. --(1)

For this, we need new teaching methods.

No method successful, unless students spend more time. --(2)

From 2, we can infer Students donot spend more time means method not successful. -- (3)

From (1) and (3), we can infer method not successful means not competitive.

Also, remember the rules: If P, then Q NEVER means ~P--> ~Q. It means ~Q --> ~P.

Now look at the options:

(A) If students spend a significant amount of time outside of class studying mathematics, the current crisis in mathematics education will be overcome. This is too broad. We know that what would happen if they donot spend time, but not the other way. Or ~P--> ~Q is incorrect. Hence, this option is incorrect.
(B) The current crisis in mathematics education will not be overcome unless students spend a significant amount of time outside of class studying mathematics. Correct, as per our analysis above.
(C) Few subjects are as important as mathematics to the effort to remain competitive in the global economy. : Other subjects are OFS.
(D) Only if we succeed in remaining competitive in the global economy will students spend a significant amount of time outside of class studying mathematics. Again, ~P--> ~Q.
(E) Students’ spending a significant amount of time outside of class studying mathematics would help us to remain competitive in the global economy. Same as D
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 08:53
abhimahna wrote:
This question is based on logical structures.

It is saying:

If Crisis in mathematics education overcome, we will remain competitive. --(1)

For this, we need new teaching methods.

No method successful, unless students spend more time. --(2)

From 2, we can infer Students donot spend more time means method not successful. -- (3)

From (1) and (3), we can infer method not successful means not competitive.

Also, remember the rules: If P, then Q NEVER means ~P--> ~Q. It means ~Q --> ~P.

Now look at the options:

(A) If students spend a significant amount of time outside of class studying mathematics, the current crisis in mathematics education will be overcome. This is too broad. We know that what would happen if they donot spend time, but not the other way. Or ~P--> ~Q is incorrect. Hence, this option is incorrect.
(B) The current crisis in mathematics education will not be overcome unless students spend a significant amount of time outside of class studying mathematics. Correct, as per our analysis above.
(C) Few subjects are as important as mathematics to the effort to remain competitive in the global economy. : Other subjects are OFS.
(D) Only if we succeed in remaining competitive in the global economy will students spend a significant amount of time outside of class studying mathematics. Again, ~P--> ~Q.
(E) Students’ spending a significant amount of time outside of class studying mathematics would help us to remain competitive in the global economy. Same as D


Thanks for the explaination :-D

Can you please elaborate the explanation for E ?

I thought : Students’ spending a significant amount of time outside of class studying mathematics ->help to overcome The current crisis in mathematics education ->help to to remain competitive in the global economy
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Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 09:54
aurobindomahanty wrote:
Thanks for the explaination :-D

Can you please elaborate the explanation for E ?

I thought : Students’ spending a significant amount of time outside of class studying mathematics ->help to overcome The current crisis in mathematics education ->help to to remain competitive in the global economy


It is based on the another rule --> P, unless Q.

Which means P will not be true unless Q is true but vice versa is not true. I mean you cannot say If Q is true, P must be true.

Let me elaborate it more.

P = No method successful
Q = Unless students spend more time.

So, E is on the same lines.

E is saying, Students spend more time, fine. But that doesn't mean method is going to be successful, which further doesnt guarantee competitiveness.

I hope it is clear now. :)
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 10:49
I understood using SC and NC.
Comp. -> Crisis overcome
Crisis Overcome - > Success in Teach

Now need help in disecting the following
"No method of teaching a subject can succeed that does not get students to spend a significant amount of time outside of class studying that subject. ".
Please help me out. how to interpret this sentence into SC -> NC format. Thank you.
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 10:53
Nightmare007 wrote:
I understood using SC and NC.
Comp. -> Crisis overcome
Crisis Overcome - > Success in Teach

Now need help in disecting the following
"No method of teaching a subject can succeed that does not get students to spend a significant amount of time outside of class studying that subject. ".
Please help me out. how to interpret this sentence into SC -> NC format. Thank you.


Sorry, I couldn't understand what SC and NC you are talking about.

Can you please elaborate so that I can help you disect it further?
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 11:24
abhimahna wrote:
Nightmare007 wrote:
I understood using SC and NC.
Comp. -> Crisis overcome
Crisis Overcome - > Success in Teach

Now need help in disecting the following
"No method of teaching a subject can succeed that does not get students to spend a significant amount of time outside of class studying that subject. ".
Please help me out. how to interpret this sentence into SC -> NC format. Thank you.


Sorry, I couldn't understand what SC and NC you are talking about.

Can you please elaborate so that I can help you disect it further?


SC = Sufficient Condition
NC = Necessary Condition.
SC -> NC .
The conditional reasoning .
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Politician: The current crisis in mathematics  [#permalink]

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New post 02 May 2017, 11:30
Nightmare007 wrote:
abhimahna wrote:
Nightmare007 wrote:
I understood using SC and NC.
Comp. -> Crisis overcome
Crisis Overcome - > Success in Teach

Now need help in disecting the following
"No method of teaching a subject can succeed that does not get students to spend a significant amount of time outside of class studying that subject. ".
Please help me out. how to interpret this sentence into SC -> NC format. Thank you.


Sorry, I couldn't understand what SC and NC you are talking about.

Can you please elaborate so that I can help you disect it further?


SC = Sufficient Condition
NC = Necessary Condition.
SC -> NC .
The conditional reasoning .
- CR powerscore Bible. :)


Oh. Sorry, it is 12 midnight for me and my brain has now exhausted after doing so many questions and work related stuffs. I hope you will understand. :)

Ok, To answer your question:

Please look at the solution I provided here: https://gmatclub.com/forum/politician-t ... l#p1845999

SC: Sufficient amount of time
NC: Method Succeeded.

Apply the rule now, you will get your answer. This is very similar to P, unless Q. :)
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 03 May 2017, 03:45
A. If X happens, Y will happen => Y may happen without X => X is not necessary to happen Y.
B. Y will not happen unless X not happen => Y will not happen without X => X is required to happen Y.
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Re: Politician: The current crisis in mathematics  [#permalink]

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New post 08 Jul 2017, 22:35
the word "logic" in the question is ambiguous. Test takers should look at the options in order to identify the question type. Here, it is an inference question.

C and D are out.
E does not show a causal relationship => E is wrong.
A and B sound similar, but they are not same. B is right, but A is wrong because the causal relationship can only happen in one way, not vice versa.
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Re: Politician: The current crisis in mathematics   [#permalink] 08 Jul 2017, 22:35
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