Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

If A, then B. If B, then C. If C, then D. If all of the [#permalink]
26 Sep 2009, 01:13

1

This post received KUDOS

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

39% (01:46) correct
61% (00:27) wrong based on 35 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.

Please help in takling such questions ,i ll appreciate detail explanation.

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.

Please help in takling such questions ,i ll appreciate detail explanation.

B.

We dont have a statement like D->A, so option A is out. option D is out as well, since there's no "E". Option E is not true, since it may be C then D. D is flawed as well, since it can be not D, but can be A. But if not B, then no C, since B-> C.

So option B is correct. Hope this helps. _________________

hi sacmanitin... ans is C.. first u have to understand what 'if A, then B.' means... anything which is A has to be B i.e. A is subset of B.... possible choices are.. i) 'if not A, then not B... need not be true as it could be something not part of both.. ii)'if B, then A.....need not be true as it could be something in B-A... various other choices ..only true choice is if not B, then not A... if it is not a part of B , itcannot be in A... putting this rule in ans only C remains...

thanks chetan , i now able to attack such problems ,from your reasoning ,i drew a diagram all the conditions can be represent like [d [c [b [a] ] ] ]

now from question stem

(A) If D, then A. ( it can be anything from d ,c ,b and a so eliminate) (B) If not B, then not C. (if not be then it can be c or not c ,eliminate) (C) If not D, then not A. (if not d then it is outside the biggest box so surely out of smallest box i e a ,correct) (D) If D, then E. (no information ,eliminate) (E) If not A, then not D. (it not in the smallest box ie not a ,it can be anything from b,c,d or not d ,so eliminate this choice as well)

(D) is totally wrong (A) is wrong because of reverse (B) is wrong. The premise did not mention If not B, then not C. Very clearly (E) is wrong, not A but appearance of C will make D true

POE, I got (C)

My another explanation: Imagine that A belong to B, B belong to C, and C belongs to D. You draw the circle around it like (D(C(B(A)))), you will eliminate all except for answer choice (C) _________________

Back to hometown after a short trip to New Delhi for my visa appointment. Whoever tells you that the toughest part gets over once you get an admit is...