BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
Live EA class + 6 months of EA OnDemand
  • Expert-led weekly online sessions
  • EA Masterclass access between classes
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

130-point score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

GMAT Prep - Modulus & Square Roots

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 55
Joined: Sat Nov 10, 2007 10:35 am
Thanked: 1 times

Re: GMAT Prep - Modulus & Square Roots

by olika » Fri Aug 08, 2008 6:28 am
Is the ans. E?

root (5) is greater than root (2), so substract and you result in negative number which is not the real number.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 35
Joined: Fri May 23, 2008 11:14 am

by aditikedia » Fri Aug 08, 2008 6:58 am
Yes it is the answer. However, not sure whether it's ok to stop the moment you get square root of a negative number.

A detailed explanation would really help here..
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 48
Joined: Fri Aug 08, 2008 4:44 am
Thanked: 4 times
GMAT Score:750

by santa_dem » Fri Aug 08, 2008 7:04 am
aditikedia wrote:Yes it is the answer. However, not sure whether it's ok to stop the moment you get square root of a negative number.

A detailed explanation would really help here..
Actualy, it's ok to stop, 'cause root of a negative is not a real number, therefore the whole expresion is not a real number.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Tue Mar 11, 2008 6:30 am
Thanked: 6 times

by bourne159 » Fri Aug 08, 2008 1:46 pm
Answer is E.

The square root of a negative number is not a real number.
In GMAT I think you should stop as soon as you see a square root of a negative number since GMAT does not deal with imaginary numbers etc...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 35
Joined: Fri May 23, 2008 11:14 am

by aditikedia » Fri Aug 08, 2008 5:49 pm
Thanks everyone! :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 172
Joined: Mon Jun 23, 2008 12:00 pmFollowed by: 1 member
Thanked: 3 times

by smclean23 » Sun Aug 10, 2008 7:30 pm
Could someone explain the step by step process?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 829
Joined: Mon Jul 07, 2008 10:09 pmFollowed by: 3 members
Location: INDIA
Thanked: 84 times

by sudhir3127 » Sun Aug 10, 2008 8:07 pm
IF you solve only sqroot(2- sqroot x) part it is enough

take X to be 5. which is 2.23
sqroot ( 2- sqroot 5)

sqroot ( 2- 2.23)
sqrt( -0.23)

As sq root of a negative number is non real. the answer shud be 5.

hope it helps..
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1