Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
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.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Absolute values

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 21
Joined: Sun Jan 18, 2009 9:12 pm
by Maratha1 » Mon Feb 16, 2009 1:35 am
Can anyone please explain the answer?

What is the value of |x|?

(1) |x2 + 16| – 5 = 27

(2) x2 = 8x – 16
carpe diem!
Top
Join the discussion
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 80
Joined: Mon Feb 02, 2009 6:36 am
Thanked: 10 times

Re: Absolute values

by billzhao » Mon Feb 16, 2009 1:43 am
Maratha1 wrote:Can anyone please explain the answer?

What is the value of |x|?

(1) |x2 + 16| – 5 = 27

(2) x2 = 8x – 16
From (1) |x^2+16|=32 => x^2=16 => x=4 or -4 =>|x|=4, suff

From (2) x^2-8*x+16=0 => (x-4)^2=0 =>x=4=>|x|=4, suff

Thus Answer is (D)
Yiliang
Top
Join the discussion
Junior | Next Rank: 30 Posts
Posts: 21
Joined: Sun Jan 18, 2009 9:12 pm

Re: Absolute values

by Maratha1 » Mon Feb 16, 2009 3:36 am
billzhao wrote:
Maratha1 wrote:Can anyone please explain the answer?

What is the value of |x|?

(1) |x2 + 16| – 5 = 27

(2) x2 = 8x – 16
From (1) |x^2+16|=32 => x^2=16 => x=4 or -4 =>|x|=4, suff

From (2) x^2-8*x+16=0 => (x-4)^2=0 =>x=4=>|x|=4, suff

Thus Answer is (D)
Thanks dude!

I've one question though, why |x^2+16| this can not be +(x^2+16) and -(x^2+16)?
carpe diem!
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 80
Joined: Mon Feb 02, 2009 6:36 am
Thanked: 10 times

by billzhao » Mon Feb 16, 2009 3:57 am
I've one question though, why |x^2+16| this can not be +(x^2+16) and -(x^2+16)?

Because x^2>=0, |x^2+16| must be greater than 0 and must equal to x^2+16
Yiliang
Top
Join the discussion
Junior | Next Rank: 30 Posts
Posts: 19
Joined: Sat Feb 07, 2009 9:00 am
Thanked: 1 times

by AJ2009 » Mon Feb 16, 2009 4:29 pm
I go with D.

|x^2+16| is always a positive value so no need worry about signs.

therefore |x^2+16|=32 or x^2+16-32=0 so x=-4 or |x|=4

stmt II give on positive value of 4 so also sufficient.
Top
Join the discussion