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If A, then B. If B, then C. If C, then D. If all of the

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VP
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If A, then B. If B, then C. If C, then D. If all of the [#permalink]

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New post 11 Oct 2008, 17:56
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A
B
C
D
E

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If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

What is the the strategy to solve these types of CR problems?

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VP
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Re: CR [#permalink]

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New post 11 Oct 2008, 20:05
ritula wrote:
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

What is the the strategy to solve these types of CR problems?

these are cause effect questions we need to target the must be situations !!!where 100% surety is there !!!

C is the answer !!!we know if A happens D must happen hence we can say when D does not happen A has not happened !!

also
A)->D can be caused by others too ,one particular cause is A,Eliminate
B)Same as above B is just one cause of C what if something else causes C
C)PERFECT ,A-> D when D does not occur no A
D)Whats E now?
E)same as A,B OUT

ANY EFFECT WHICH EXISTS DUE TO A CAUSE SHOWS THAT IF ITS ABSENT THE CORRESPONDING CAUSE IS ALSO ABSENT but not vice versa since THE EFFECT CAN HAVE MULTIPLE CAUSES.

HTH
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cheers
Its Now Or Never

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Director
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Re: CR [#permalink]

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New post 11 Oct 2008, 20:12
ritula wrote:
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

What is the the strategy to solve these types of CR problems?



I have seen these types of CR on the LSAT, but not the GMAT. Does the gmat test on these type of questions?

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VP
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Re: CR [#permalink]

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New post 11 Oct 2008, 20:48
I came thru this question on one of GMAT practice test only.
bigtreezl wrote:
ritula wrote:
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

What is the the strategy to solve these types of CR problems?



I have seen these types of CR on the LSAT, but not the GMAT. Does the gmat test on these type of questions?

Kudos [?]: 529 [0], given: 0

Director
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Re: CR [#permalink]

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New post 11 Oct 2008, 21:16
ritula wrote:
I came thru this question on one of GMAT practice test only.
bigtreezl wrote:
ritula wrote:
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

Time to dust off the old LSAT logical reasoning techniques
What is the the strategy to solve these types of CR problems?



I have seen these types of CR on the LSAT, but not the GMAT. Does the gmat test on these type of questions?

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Senior Manager
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Re: CR [#permalink]

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New post 12 Oct 2008, 14:46
Look for words such as : - almost, some , most, virtually all etc.

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Location: Motortown
Re: CR [#permalink]

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New post 12 Oct 2008, 15:13
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If A, Then B

A implies B True
B Implies A False (converse)
not A implies not B False (Inverse)
not B implies not A True (Contra positive)

(A) If D, then A. Converse - Ruled out
(B) If not B, then not C. Inverse - Ruled out
(C) If not D, then not A. Contrapositive - Answer
(D) If D, then E. ????
(E) If not A, then not D Inverse - Ruled out

So, answer is C

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SVP
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Re: CR [#permalink]

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New post 13 Oct 2008, 06:57
[quote="ritula"]If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

TRANSLATE

IF Europians then blonds

If blonds then beautifull

if beautifull then green eyes

D

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VP
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Posts: 1033

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Re: CR [#permalink]

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New post 13 Oct 2008, 18:56
LiveStronger wrote:
If A, Then B

A implies B True
B Implies A False (converse)
not A implies not B False (Inverse)
not B implies not A True (Contra positive)

(A) If D, then A. Converse - Ruled out
(B) If not B, then not C. Inverse - Ruled out
(C) If not D, then not A. Contrapositive - Answer
(D) If D, then E. ????
(E) If not A, then not D Inverse - Ruled out

So, answer is C


Thank you :) +1

BTW, Is this question from an official source? I hope GMAC is not out to test LSAT type questions on us....
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

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Re: CR   [#permalink] 13 Oct 2008, 18:56
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If A, then B. If B, then C. If C, then D. If all of the

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