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.
Nov 1912:30 PM EST
-01:30 PM EST
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2001:30 PM EST
-02:30 PM IST
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2407:00 PM PST
-08:00 PM PST
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Nov 2510:00 AM EST
-11:00 AM EST
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
03 Jul 2025, 08:00
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
16% (00:58) correct
84%
(00:51)
wrong
based on 510
sessions
History
Date
Time
Result
Not Attempted Yet
African grey parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. Can an African grey parrot detect color W?
(1) Color V has a wavelength of 300 nanometers.
(2) The wavelength of color W is twice that of color V.
(1) Color V has a wavelength of 300 nanometers.
(2) The wavelength of color W is twice that of color V.
|
03 Jul 2025, 08:30
Kudos
Bookmarks
African grey parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. Can an African grey parrot detect color W?
(1) Color V has a wavelength of 300 nanometers.
This is insufficient. We are told nothing about color W.
(2) The wavelength of color W is twice that of color V.
This is also insufficient. It only gives a relationship between W and V, without specifying either value.
(1)+(2) From the above, we can determine that the wavelength of color W is 600 nanometers. We know that parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. However, we are not told what wavelengths below 620 are actually detectable. For example, if parrots can detect only colors in the range 610–619 nanometers, then a wavelength of 600 would still be undetectable. While it’s certainly possible that 600 is detectable, we cannot be sure. Not sufficient.
Answer: E.
GMAT Club Official Explanation:
African grey parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. Can an African grey parrot detect color W?
(1) Color V has a wavelength of 300 nanometers.
This is insufficient. We are told nothing about color W.
(2) The wavelength of color W is twice that of color V.
This is also insufficient. It only gives a relationship between W and V, without specifying either value.
(1)+(2) From the above, we can determine that the wavelength of color W is 600 nanometers. We know that parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. However, we are not told what wavelengths below 620 are actually detectable. For example, if parrots can detect only colors in the range 610–619 nanometers, then a wavelength of 600 would still be undetectable. While it’s certainly possible that 600 is detectable, we cannot be sure. Not sufficient.
Answer: E.
General Discussion
03 Jul 2025, 08:18
Kudos
Bookmarks
African grey parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers.
Can an African grey parrot detect color W?
Is wavelength of W<= 620?
Need W to answer this
S1
Color V has a wavelength of 300 nanometers.
No info on W
Insufficient
S2
The wavelength of color W is twice that of color V.
No info on V
Insufficient
Combined, we have wavelength of V=300, wavelength of W=600. Sufficient
Can an African grey parrot detect color W?
Is wavelength of W<= 620?
Need W to answer this
S1
Color V has a wavelength of 300 nanometers.
No info on W
Insufficient
S2
The wavelength of color W is twice that of color V.
No info on V
Insufficient
Combined, we have wavelength of V=300, wavelength of W=600. Sufficient
Bunuel
