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
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
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
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
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.

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 559 reviewsTarget Test Prep

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

Got stumped with this one

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
GMAT Instructor
Posts: 83
Joined: Sun Mar 02, 2008 9:05 pmFollowed by: 2 members
Thanked: 21 times

by rey.fernandez » Sat Jul 12, 2008 12:28 am
What's the source of this question? The problem describes a rectangle that cannot exist.

Consider the right triangle formed by two adjacent sides of the rectangle and the diagonal. Its side lengths are x, y, and z, such that z is the length of the hypotenuse.

Statement (1) says that x-y=z. This implies that x=y+z. But this is impossible for a triangle. The sum of any two sides of a triangle must be greater than the third side.

Is this a typo?
Rey Fernandez
Instructor
Manhattan GMAT
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 48
Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Sat Jul 12, 2008 1:37 am
Heye..thanks for the reply.

No its not a typo..ive written it exactly like i found on the book.

This is a data sufficiency question from Princeton Review - Cracking the GMAT 2008 book i have. Its from the Math Test in the Book ( Bin Four - Hard Questions) and the answer provided is option C. I couldnt make any sense out of either. Maybe its a misprint.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 48
Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Sat Jul 12, 2008 1:54 am
Ive got another question from the same book. I couldnt figure this one out either....

Q. The members of the newest recruiting class of a certain military organization are taking their physical conditioning test, and those who score in the bottom 16 percent will have to retest. If the scores are normally distributed and have an arithmetic mean of 72, what is the score at or below which the recruits will have to retest?

1. There are 500 recruits in the class.
2. 10 recruits scored 82 or higher.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 24
Joined: Sun May 04, 2008 12:18 pm
Thanked: 1 times

by target790 » Sat Jul 12, 2008 2:23 am
I also believe 1st question is wrong.Consider the following in the given rectangle.

1>x-y=z
Squaring on both sides


=>x2 + y2 -2xy =z2
from pythagoras theorem(x2 + y2=z2)

=>z2 -2xy =z2
which leaves xy=0

So the given rectangle can't even exists.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 48
Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Sat Jul 12, 2008 2:47 am
Ya. I think the first question is misprint. But what about the other one..how do u solve that one ?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Wed Jun 11, 2008 10:17 pm

by tripathimani » Wed Dec 31, 2008 11:06 pm
There is a typo in your book.

(1) states that x-y=7 (NOT x-y=z)
(2) z=13

A triangle is possible with this data
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 13
Joined: Wed Dec 31, 2008 2:20 pm
Location: London

by daisy » Thu Jan 01, 2009 5:07 am
tripathimani wrote:There is a typo in your book.

(1) states that x-y=7 (NOT x-y=z)
(2) z=13

A triangle is possible with this data[/quote

If x-y = 7, then IMO (B) fits over here.

By Statement 1:
Does not lead us to figure out the possible values of all the elements: x, y and z. Hence, Insufficient.

By Statement 2:
x = 12 and y = 5 then z = 13, then perimeter = 34
or
try any other combination of x and y where x + y > z and x^2 + y^2 = z^2.
This only satisfy when x = 12 and y = 5

Hence, IMO (B)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Thu Jan 01, 2009 8:30 am
Sandman wrote:Ive got another question from the same book. I couldnt figure this one out either....

Q. The members of the newest recruiting class of a certain military organization are taking their physical conditioning test, and those who score in the bottom 16 percent will have to retest. If the scores are normally distributed and have an arithmetic mean of 72, what is the score at or below which the recruits will have to retest?

1. There are 500 recruits in the class.
2. 10 recruits scored 82 or higher.
Where did you get this question?
Normal distributions are beyond the scope of the GMAT. To solve this question, you would need either a calculator or a table of something called "z-scores."
My advice: If you come across any more questions involving normal distributions, ignore them.
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2623
Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members
Location: Montreal
Thanked: 1090 times
GMAT Score:780

by Ian Stewart » Thu Jan 01, 2009 11:31 am
Sandman wrote:Ive got another question from the same book. I couldnt figure this one out either....

Q. The members of the newest recruiting class of a certain military organization are taking their physical conditioning test, and those who score in the bottom 16 percent will have to retest. If the scores are normally distributed and have an arithmetic mean of 72, what is the score at or below which the recruits will have to retest?

1. There are 500 recruits in the class.
2. 10 recruits scored 82 or higher.
I described what is wrong both with this question and with its solution in another thread:

www.beatthegmat.com/standard-deviation- ... 03-15.html

You absolutely do not need to know anything about normal distributions for the test, and you should ignore this question entirely; the math in the question is actually wrong, and in any case is irrelevant to GMAT test takers.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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