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

number system

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 468
Joined: Mon Jul 25, 2011 10:20 pmFollowed by: 4 members
Thanked: 29 times
by vipulgoyal » Wed Jul 10, 2013 10:51 pm
In the number line, point A, B, C, D, and E are spaced equally. If point A represents 3^11 and point B represents 3^12, point E represents which of the following values?
(A) 3^11+3^12
(B) 3^13
(C) 3^12+3^13
(D) 3^14
(E) 3^15
B
Top
Join the discussion
Source: — Problem Solving |
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Thu Jul 11, 2013 2:41 am
vipulgoyal wrote:In the number line, point A, B, C, D, and E are spaced equally. If point A represents 3^11 and point B represents 3^12, point E represents which of the following values?
(A) 3^11+3^12
(B) 3^13
(C) 3^12+3^13
(D) 3^14
(E) 3^15
B
Since the points are EQUALLY SPACED, the number line looks like this:
A=3¹¹......B=3¹².....C......D......E

Distance between B and A = 3¹² - 3¹¹ = 3¹¹I3-1) = 3¹¹(2).

To travel from B to E, this distance must be added to B a total of 3 times.
Thus:
E = 3¹² + 3(3¹¹)(2) = 3¹² + (3¹²)(2) = 3(3¹²) = 3¹³.

The correct answer is B.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16206
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Thu Jul 11, 2013 6:42 am
vipulgoyal wrote:In the number line, point A, B, C, D, and E are spaced equally. If point A represents 3^11 and point B represents 3^12, point E represents which of the following values?
(A) 3^11+3^12
(B) 3^13
(C) 3^12+3^13
(D) 3^14
(E) 3^15
B
Here's another approach:

First, let's examine some OTHER examples of equally-spaced values:
5, 15, 25, 35, 45
We can rewrite these 5 values as 1(5), 3(5), 5(5), 7(5), 9(5)
Notice that each value is rewritten as a product of 5.
Also notice that the coefficients (1, 3, 5 etc.) increase by 2 each time.

Here some more examples of equally spaced values:
4(2),7(2),10(2),13(2),17(2)
In this example, the coefficients (4, 7, 10 etc.) increase by 3 each time.

-3(11), 5(11), 13(11), 21(11), 29(11),
In this example, the coefficients (-3, 5, 13 etc.) increase by 8 each time.

So, if we can take equally-spaced values and rewrite them as products with like terms, the coefficients will increase (or decrease) the same amount.

Okay, now onto the question.
A = 3^11 = (1)(3^11)
B = 3^12 = (3^1)(3^11) = (3)(3^11)
So, the coefficients must increase by 2 each time, which means . . .
C = (5)(3^11)
D = (7)(3^11)
E = (9)(3^11) = (3^2)(3^11) = [spoiler]3^13 = B[/spoiler]

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 38
Joined: Mon Jun 21, 2010 12:37 pm

by subhakam » Thu Sep 12, 2013 6:43 pm
Brent@GMATPrepNow wrote:
vipulgoyal wrote:In the number line, point A, B, C, D, and E are spaced equally. If point A represents 3^11 and point B represents 3^12, point E represents which of the following values?
(A) 3^11+3^12
(B) 3^13
(C) 3^12+3^13
(D) 3^14
(E) 3^15
B
Here's another approach:

First, let's examine some OTHER examples of equally-spaced values:
5, 15, 25, 35, 45
We can rewrite these 5 values as 1(5), 3(5), 5(5), 7(5), 9(5)
Notice that each value is rewritten as a product of 5.
Also notice that the coefficients (1, 3, 5 etc.) increase by 2 each time.

Here some more examples of equally spaced values:
4(2),7(2),10(2),13(2),17(2)
In this example, the coefficients (4, 7, 10 etc.) increase by 3 each time.

-3(11), 5(11), 13(11), 21(11), 29(11),
In this example, the coefficients (-3, 5, 13 etc.) increase by 8 each time.

So, if we can take equally-spaced values and rewrite them as products with like terms, the coefficients will increase (or decrease) the same amount.

Okay, now onto the question.
A = 3^11 = (1)(3^11)
B = 3^12 = (3^1)(3^11) = (3)(3^11)
So, the coefficients must increase by 2 each time, which means . . .
C = (5)(3^11)
D = (7)(3^11)
E = (9)(3^11) = (3^2)(3^11) = [spoiler]3^13 = B[/spoiler]

Cheers,
Brent
Hello Brent - I am having a hard time understanding the below
"if we can take equally-spaced values and rewrite them as products with like terms, the coefficients will increase (or decrease) the same amount"

In other words- does the problem above represent liner or exponential sequence? Looking at the constant increase of multiple of 3 , i assume this is an exponential sequence? If that is the case then E should be 3^15
This is because i am plugging in the value of exponential sequence-
Let me know
Thanks
Top
Join the discussion