GMAT Prep2 (Numbers)

Expert replies

Previous Topic Next Topic

dferm: Master | Next Rank: 500 Posts; Posts: 446; Joined: Thu Jul 26, 2007 1:07 pm; Thanked: 6 times

by dferm » Wed May 14, 2008 7:45 am

Please Help..

Thanks.

Attachments

Like this post

Source: Beat The GMAT — Data Sufficiency | Wed May 14, 2008 7:45 am

codesnooker: Legendary Member; Posts: 543; Joined: Fri Jan 18, 2008 1:01 am; Thanked: 43 times; GMAT Score:580

by codesnooker » Wed May 14, 2008 7:26 pm

Lets try to design the possible number line first.

Tips:-
* keep A as constant.
* Mark C as C1 and C2 on the both sides of A. (C1 and C2 could be the possible location of C)
* Mark B as B1, B2, B3 and B4 where

B1 is extreme left to A, C1 and C2
B2 lies between C1 and A
B3 lies between A and C2
B4 lies extreme right to A, C1 and C2

Assumption: None of the point overlap each other.

So our number line would like something like this:-

------B1------C1------B2------A------B3------C2------B4------

Now by condition 1:

B = A + 3
This will rule out B1 and B2 from the above number line. So, our new number line would be something like this:-

-----------C1--------------A------B3------C2------B4------

B = C - 5
This will rule out C1 and B4 from the above number line. So, our new number line would be something like this:-

---------------------------A------B3------C2--------------

B lies between A and C. hence condition 1 is SUFFICIENT.

Condition 2:

Again draw the number line:

------B1------C1------B2------A------B3------C2------B4------

C = A + 8
This will rule out C1 from the above number line. So, our new number line would be something like this:-

------B1--------------B2------A------B3------C2------B4------

again C = B + 5, it means B <C> A
therefore, This will rule out B1, B2, and B4 from the above number line. So, our new number line would be something like this:-

---------------------------A------B3------C2--------------

B lies between A and C, hence condition 2 is also alone SUFFICIENT.

Like this post

netigen: Legendary Member; Posts: 631; Joined: Mon Feb 18, 2008 11:57 pmFollowed by: 3 members; Thanked: 29 times

by netigen » Wed May 14, 2008 9:01 pm

Better yet assume a number for C=10

(1) b=5 and a=2
(2) b=5 and a=2

so both sufficient.

Like this post

amitansu: Master | Next Rank: 500 Posts; Posts: 294; Joined: Tue Feb 26, 2008 9:05 pmFollowed by: 1 member; Thanked: 13 times

by amitansu » Wed May 14, 2008 9:19 pm

D is ans here.

From q itself : is a<b<c>a
b=c-5 so b< c sufficient

From 2: c=5+b so b<c> a and also, b>a since 3 is added with 5+a.
Sufficient.

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review