Events & Promotions
|
|
GMAT Club Daily Prep
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1308:30 AM PDT
-09:30 AM PDT
In Episode 4 of our GMAT Ninja CR series, we tackle the most intimidating CR question type: Boldface & "Legalese" questions. If you've ever stared at an answer choice that reads, "The first is a consideration introduced to counter a position that...- May 12
07:30 AM PDT
-08:30 AM PDT
Join the Live and learn more about Picking the Right Schools 
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products.- May 14
08:30 AM PDT
-09:30 AM PDT
Most GMAT test-takers are intimidated by the hardest GMAT Verbal questions. In this session, Target Test Prep GMAT instructor Erika Tyler-John, a 100th percentile GMAT scorer, will show you how top scorers break down challenging Verbal questions.. - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
16 Sep 2014, 00:53
Kudos
Bookmarks
If one side of a rectangle was reduced by 20%, by how much does the other side have to be increased so that the area of the rectangle would not change?
A. 18%
B. 20%
C. 24%
D. 25%
E. 30%
A. 18%
B. 20%
C. 24%
D. 25%
E. 30%
16 Sep 2014, 00:53
Kudos
Bookmarks
Official Solution:
If one side of a rectangle was reduced by 20%, by how much does the other side have to be increased so that the area of the rectangle would not change?
A. 18%
B. 20%
C. 24%
D. 25%
E. 30%
If \(a\) and \(b\) represent the original side lengths, then after reducing one side, the rectangle's area becomes \((0.8a) * b = \frac{4}{5}(ab)\). Consequently, the other side, \(b\), must become \(\frac{5}{4}b=1.25b\), which constitutes an increase by 25% to maintain the new area as \(ab\):
\((0.8a)(1.25b) = ( \frac{4}{5}a) (\frac{5}{4}b) = ab\).
Note that this is not a Geometry question. While it uses basic knowledge of lines and figures, it is a Percent Word Problem question. There are 8 questions within GMAT Prep Focus Edition that use similar principles. Here is one example.
Answer: D
If one side of a rectangle was reduced by 20%, by how much does the other side have to be increased so that the area of the rectangle would not change?
A. 18%
B. 20%
C. 24%
D. 25%
E. 30%
If \(a\) and \(b\) represent the original side lengths, then after reducing one side, the rectangle's area becomes \((0.8a) * b = \frac{4}{5}(ab)\). Consequently, the other side, \(b\), must become \(\frac{5}{4}b=1.25b\), which constitutes an increase by 25% to maintain the new area as \(ab\):
\((0.8a)(1.25b) = ( \frac{4}{5}a) (\frac{5}{4}b) = ab\).
Note that this is not a Geometry question. While it uses basic knowledge of lines and figures, it is a Percent Word Problem question. There are 8 questions within GMAT Prep Focus Edition that use similar principles. Here is one example.
Answer: D
21 Nov 2016, 09:06
Kudos
Bookmarks
0.8 * x = 1 (width * length = 1)
x = 1 / 0.8
x = 1 / (4/5)
x= 1/1 * 5/4
x = 5/4
x = 1 + 1/4
Thus increase of 25 % required
x = 1 / 0.8
x = 1 / (4/5)
x= 1/1 * 5/4
x = 5/4
x = 1 + 1/4
Thus increase of 25 % required
