Last visit was: 24 Apr 2026, 11:18 It is currently 24 Apr 2026, 11:18
Close
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

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.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 24 Apr 2026
Posts: 109,814
Own Kudos:
Given Kudos: 105,873
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,814
Kudos: 811,044
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
CounterSniper
Joined: 20 Feb 2015
Last visit: 14 Apr 2023
Posts: 611
Own Kudos:
Given Kudos: 74
Concentration: Strategy, General Management
Posts: 611
Kudos: 859
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
pandeyashwin
Joined: 14 Jun 2018
Last visit: 25 Jan 2019
Posts: 165
Own Kudos:
321
 [1]
Given Kudos: 176
Posts: 165
Kudos: 321
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 24 Apr 2026
Posts: 22,285
Own Kudos:
Given Kudos: 302
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 22,285
Kudos: 26,534
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
The size of a TV screen is given as the length of the screen's diagonal. If the screens were flat, then the diagonal of a square screen with an area of 98 square inches would be how many inches smaller than the diagonal of a square screen with an area of 162 square inches?


A. \(\sqrt{2}\)

B. 2

C. \(2\sqrt{2}\)

D. 4

E. 8

For a square, we recall that the ratio between the side and the diagonal is x : x√2. The TV screen that is 98 square inches has a side length of:

√98 = √49 x √2 = 7√2, which means the diagonal has a length of 7√2 x √2 = 14.

The TV screen that is 162 square inches has a side length of:

√162 = √81 x √2 = 9√2, which means the diagonal has a length of 9√2 x √2 = 18.

So there is a difference between the diagonals of the 2 TV screens is:

18 - 14 = 4

Answer: D
Moderators:
Math Expert
109814 posts
Tuck School Moderator
853 posts