Author
Message
TAGS:
VP

Joined: 22 Nov 2007

Posts: 1102

Followers: 6

Kudos [? ]:
128
[0 ] , given: 0

If A, then B. If B, then C. If C, then D. If all of the [#permalink ]
14 Jan 2008, 21:59

Question Stats:

0% (00:00) correct

0% (00:00) wrong

based on 0 sessions
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.

Manager

Joined: 21 Dec 2007

Posts: 99

Followers: 1

Kudos [? ]:
14
[0 ] , given: 0

B?

Manager

Joined: 16 Jan 2007

Posts: 73

Followers: 1

Kudos [? ]:
5
[0 ] , given: 0

I have got 2 answers . Option B and option E. They both are similar. Is the Option D stated correctly (about reference for E)?

Manager

Joined: 07 Dec 2006

Posts: 169

Followers: 1

Kudos [? ]:
24
[0 ] , given: 0

IMO, B

SVP

Joined: 04 May 2006

Posts: 1941

Schools: CBS, Kellogg

Followers: 18

Kudos [? ]:
294
[0 ] , given: 1

marcodonzelli wrote:

If A, then B. If B, then C. If C, then D. if A, then D and one must be also true is if not D, then not A. So C 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.

_________________

Get the best GMAT Prep Resources with GMAT Club Premium Membership

VP

Joined: 22 Nov 2007

Posts: 1102

Followers: 6

Kudos [? ]:
128
[0 ] , given: 0

sondenso wrote:

marcodonzelli wrote:

If A, then B. If B, then C. If C, then D. if A, then D and one must be also true is if not D, then not A. So C 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.

good job man, OA is C.

Manager

Joined: 21 Dec 2007

Posts: 99

Followers: 1

Kudos [? ]:
14
[0 ] , given: 0

why not B? plzz explain and also tell some tips to solve these kind of qstions...

Manager

Joined: 02 Jan 2008

Posts: 159

Followers: 2

Kudos [? ]:
57
[0 ] , given: 0

IF X then Y -- also implies --> If NOT Y then NOT X working backwards, If NOT D, then NOT C, IF NOT C then NOT B, and finally If NOT B, then NOT A so NOT D leads to NOT A

Director

Joined: 01 Jan 2008

Posts: 629

Followers: 3

Kudos [? ]:
131
[0 ] , given: 1

I used the same logic to get to C.

CEO

Joined: 29 Mar 2007

Posts: 2593

Followers: 16

Kudos [? ]:
193
[0 ] , given: 0

srp wrote:

IF X then Y -- also implies --> If NOT Y then NOT X working backwards, If NOT D, then NOT C, IF NOT C then NOT B, and finally If NOT B, then NOT A so NOT D leads to NOT A

Nice explanation!

VP

Joined: 22 Oct 2006

Posts: 1443

Schools: Chicago Booth '11

Followers: 7

Kudos [? ]:
150
[0 ] , given: 12

think logically. from the statements you get: A -> D by transitive property so if we know D did not happen from choice C, then A could not have happened because A causes D so Ans C: If not D, then Not A

Manager

Joined: 07 Dec 2006

Posts: 169

Followers: 1

Kudos [? ]:
24
[0 ] , given: 0

so if we know D did not happen from choice C, then A could not have happened because A causes D so Ans C: If not D, then Not A How about B? It should be correct as well, if I work on the same logic.

Could you please explian the flaw in B?

Thank you.

Manager

Joined: 02 Jan 2008

Posts: 159

Followers: 2

Kudos [? ]:
57
[0 ] , given: 0

GHIBI wrote:

so if we know D did not happen from choice C, then A could not have happened because A causes D so Ans C: If not D, then Not A How about B? It should be correct as well, if I work on the same logic.

Could you please explian the flaw in B?

Thank you.

B says, If NOT B then NOT C - which is not correct

We have "If B then C" which is NOT the same as "IF NOT B then NOT C"

Similar topics
Author
Replies
Last post
Similar Topics:

If A, then B. If B, then C. If C, then D. If all of the
ywilfred
14
31 Aug 2005, 08:17

If A, then B. If B, then C. If C, then D. If all of the
wild_desperado
9
24 Jun 2005, 01:06

If A, then B. If B, then C. If C, then D. If all of the
MA
8
19 Apr 2005, 22:34

If A, then B. If B, then C. If C, then D. If all of the
sonaketu
8
03 Dec 2004, 04:50

If A, then B. If B, then C. If C, then D. If all of the
Antmavel
6
20 Oct 2004, 07:47

Moderators:
WaterFlowsUp , WoundedTiger , RaviChandra , PiyushK , dentobizz , Vercules , mau5 , souvik101990 , PTK , MacFauz , carcass , mikemcgarry , Gnpth , tuanquang269 , pqhai , Narenn