It is currently 21 Nov 2018, 07:46
My Tests

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.

The operation @ is defined by the equation a@b = (a – 1)(b –

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4722
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 91

Kudos [?]: 1630 [0], given: 390

CAT Tests
The operation @ is defined by the equation a@b = (a – 1)(b – [#permalink] New post 30 Jul 2018, 10:27
Expert's post
00:00

Question Stats:

77% (01:08) correct 22% (02:14) wrong based on 9 sessions
The operation @ is defined by the equation a@b = (a – 1)(b – 2). x@5 = 3@x

Quantity A
Quantity B
x
1


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Director
Director
User avatar
Joined: 07 Jan 2018
Posts: 540
Followers: 4

Kudos [?]: 467 [0], given: 83

CAT Tests
Re: The operation @ is defined by the equation a@b = (a – 1)(b – [#permalink] New post 01 Aug 2018, 09:12
x@5 = (x-1)(3)
= 3x - 3

3@x = 2(x-2)
= 2x - 4

From question,
3x - 3 = 2x - 4
or, x= -1
B>A

Posted from my mobile device Image
_________________

This is my response to the question and may be incorrect. Feel free to rectify any mistakes

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4722
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 91

Kudos [?]: 1630 [0], given: 390

CAT Tests
Re: The operation @ is defined by the equation a@b = (a – 1)(b – [#permalink] New post 12 Aug 2018, 05:36
Expert's post
Explanation

This problem defines a function for the made-up symbol @. Use the definition of the new symbol to rewrite the equation x@5 = 3@x without the @ operator:


For x@5, a = x and b = 5: x@5 = (x – 1)(5 – 2) = 3x – 3.
For 3@x, a = 3 and b = x: 3@x = (3 – 1)(x – 2) = 2x – 4.

Equating these two expressions gives you:
\(3x - 3 = 2x - 4\)
\(x = -1\)

Quantity B is greater.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: The operation @ is defined by the equation a@b = (a – 1)(b –   [#permalink] 12 Aug 2018, 05:36
Display posts from previous: Sort by

The operation @ is defined by the equation a@b = (a – 1)(b –

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.