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.

geometry

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 659
Joined: Mon Dec 14, 2009 8:12 amFollowed by: 3 members
Thanked: 32 times
by Gurpinder » Tue Sep 14, 2010 10:59 am
in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MO is 11.
(2) NO is longer than MN


please explain!!
Last edited by Gurpinder on Tue Sep 14, 2010 3:52 pm, edited 1 time in total.
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 422
Joined: Mon Aug 09, 2010 11:47 amFollowed by: 1 member
Thanked: 22 times
GMAT Score:680

by beatthegmatinsept » Tue Sep 14, 2010 12:26 pm
Can you check choice a? MNO = 11? Did you mean NO = 11?
Being defeated is often only a temporary condition. Giving up is what makes it permanent.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 866
Joined: Mon Aug 02, 2010 6:46 pm
Location: Gwalior, India
Thanked: 31 times

by goyalsau » Tue Sep 14, 2010 2:56 pm
Gurpinder wrote:in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MNO is 11.
(2) NO is longer than MN


please explain!!
my answer is E,
what's the official answer?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 659
Joined: Mon Dec 14, 2009 8:12 amFollowed by: 3 members
Thanked: 32 times

by Gurpinder » Tue Sep 14, 2010 3:52 pm
sorry guys, i've made the correction.

thx
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 1460
Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members
Thanked: 135 times

by selango » Tue Sep 14, 2010 8:58 pm
MN=5

stmt2,

NO is longer than MN.

-->MO and MN are of equal length.MO=5

We still don't know value of NO.

Isuff

stmt2,

Length of MO=11


-->NO and MN are of equal length.

Actually this contradicts stmt2.

Hey gurpinder I think its length of NO is 11.

MO and MN are of equal length.MO=5

Perimtere of triangle=MN+MO+NO=5+5+11=21

Suff

Pick A
--Anand--
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 659
Joined: Mon Dec 14, 2009 8:12 amFollowed by: 3 members
Thanked: 32 times

by Gurpinder » Tue Sep 14, 2010 9:02 pm
selango wrote:MN=5

Hey gurpinder I think its length of NO is 11.
hey....

no man MO = 11.

i just checked. this question is from Princeton book pg. 157
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 422
Joined: Mon Aug 09, 2010 11:47 amFollowed by: 1 member
Thanked: 22 times
GMAT Score:680

by beatthegmatinsept » Tue Sep 14, 2010 9:09 pm
Gurpinder wrote:in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MO is 11.
(2) NO is longer than MN


please explain!!
A is enough.
Rules of sides of a triangle:
difference of 2 sides (11-5 = 6) is always smaller than the 3rd side. So you know 3rd side cant be equal to MN (=5), so it must be equal to 11, since its an isosceles triangle. Perimeter = 11 + 11 + 5 = 27.
A Sufficient.

B doesn't give you enough information. So, B Insufficient.
Being defeated is often only a temporary condition. Giving up is what makes it permanent.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 866
Joined: Mon Aug 02, 2010 6:46 pm
Location: Gwalior, India
Thanked: 31 times

by goyalsau » Tue Sep 14, 2010 10:38 pm
beatthegmatinsept wrote:
Gurpinder wrote:in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MO is 11.
(2) NO is longer than MN


please explain!!
A is enough.
Rules of sides of a triangle:
difference of 2 sides (11-5 = 6) is always smaller than the 3rd side. So you know 3rd side cant be equal to MN (=5), so it must be equal to 11, since its an isosceles triangle. Perimeter = 11 + 11 + 5 = 27.
A Sufficient.

B doesn't give you enough information. So, B Insufficient.
Good work beatthegmatinsept .
Can you please share that why thought firstly when you saw the question that it can be wrong.
I think that is also a very important concept.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 866
Joined: Mon Aug 02, 2010 6:46 pm
Location: Gwalior, India
Thanked: 31 times

by goyalsau » Tue Sep 14, 2010 10:45 pm
goyalsau wrote:
Gurpinder wrote:in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MNO is 11.
(2) NO is longer than MN


please explain!!
my answer is E,
what's the official answer?
Guys i Just wana ask is this the right answer to this question...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 422
Joined: Mon Aug 09, 2010 11:47 amFollowed by: 1 member
Thanked: 22 times
GMAT Score:680

by beatthegmatinsept » Wed Sep 15, 2010 6:26 am
goyalsau wrote:
beatthegmatinsept wrote:
Gurpinder wrote:in isosceles triangle MNO, the length of MN is 5. What is the perimeter of the triangle?
(1) the length of MO is 11.
(2) NO is longer than MN


please explain!!
A is enough.
Rules of sides of a triangle:
difference of 2 sides (11-5 = 6) is always smaller than the 3rd side. So you know 3rd side cant be equal to MN (=5), so it must be equal to 11, since its an isosceles triangle. Perimeter = 11 + 11 + 5 = 27.
A Sufficient.

B doesn't give you enough information. So, B Insufficient.
Good work beatthegmatinsept .
Can you please share that why thought firstly when you saw the question that it can be wrong.
I think that is also a very important concept.
It said "the length of MNO is 11. "
I started to think of a circle, if MNO is an arc? Or if it meant MN or NO... Actually, I was also being plain lazy to not solve a problem that I wasn't sure of what it was saying :)
Being defeated is often only a temporary condition. Giving up is what makes it permanent.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1