Live GMAT classes with Target Test Prep start Nov 1 and Nov 21. 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 1
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 1 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
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
EALiveTeachOnDemand5 seats leftStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
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 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

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

How is "IS" n "charactize"correct?

Expert replies
Source: — Sentence Correction |

by [email protected] » Thu Mar 20, 2014 11:41 pm
Hi mukherjee.tanuj3,

This SC is built on a few rules that test your knowledge of "singular vs. plural"

1) Verbs - The sentence refers to "…numerous obstacles, not the least of which…."; the phrase "not the least of which" refers to ONE obstacle, so we need the verb "is" Eliminate B and D.

2) Nouns - Again, the phrase "not the least of which" refers to ONE obstacle, so we need the noun "challenge" Eliminate E.

3) Verb #2 - The phrase "…the decreased atmospheric pressure AND correspondingly low oxygen availability that…." requires the verb "characterize." Eliminate C.

Final Answer: A

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Join the discussion

by bubbliiiiiiii » Fri Mar 21, 2014 2:04 am
A quick scan of answer choices, based on singular/plural rule, eliminates B, D and E.

Between A and C, a quick scan at the end, again based on verb agreement, eliminates C.

Hope it helps. :)
Regards,

Pranay
Join the discussion

by aditya8062 » Fri Mar 21, 2014 5:51 am
[email protected] wrote:Hi mukherjee.tanuj3,

This SC is built on a few rules that test your knowledge of "singular vs. plural"

1) Verbs - The sentence refers to "…numerous obstacles, not the least of which…."; the phrase "not the least of which" refers to ONE obstacle, so we need the verb "is" Eliminate B and D.

2) Nouns - Again, the phrase "not the least of which" refers to ONE obstacle, so we need the noun "challenge" Eliminate E.

3) Verb #2 - The phrase "…the decreased atmospheric pressure AND correspondingly low oxygen availability that…." requires the verb "characterize." Eliminate C.

Final Answer: A

GMAT assassins aren't born, they're made,
Rich
The above explanation does not seem correct .the reason we are using singular verb "is" is because the subject "challenge" is singular .my point is had it been "challenges" then we should have been using plural "are" .
Join the discussion

by [email protected] » Fri Mar 21, 2014 4:29 pm
Hi aditya8062,

You have the "relationship" between noun and verb reversed.

The phrase "not the least of which" refers to a singular obstacle (it means 'of the various obstacles, this ONE obstacle is not the least'), so we need the word "is."

Now that we know we're dealing with a singular obstacle (and we have the verb "is"), we need the word "challenge" to define that singular obstacle.

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Join the discussion