GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 17 Jan 2019, 21:37

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• The winning strategy for a high GRE score

January 17, 2019

January 17, 2019

08:00 AM PST

09:00 AM PST

Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
• Free GMAT Strategy Webinar

January 19, 2019

January 19, 2019

07:00 AM PST

09:00 AM PST

Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

On a certain number line, there are 10 marks evenly spaced. If the fi

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 52232
On a certain number line, there are 10 marks evenly spaced. If the fi  [#permalink]

Show Tags

11 Jan 2018, 22:06
00:00

Difficulty:

45% (medium)

Question Stats:

64% (01:37) correct 36% (01:42) wrong based on 59 sessions

HideShow timer Statistics

On a certain number line, there are 10 marks evenly spaced. If the fifth mark has a value equal to 2.3 and the tenth mark's value is equal to 3.8, then what is the value of the second mark?

A. 0.3
B. 1.1
C. 1.4
D. 1.5
E. 1.7

_________________
Manager
Joined: 23 May 2017
Posts: 241
Concentration: Finance, Accounting
WE: Programming (Energy and Utilities)
Re: On a certain number line, there are 10 marks evenly spaced. If the fi  [#permalink]

Show Tags

21 Jan 2018, 14:17
generic formula for a series in Arithmetic progression = a(n) = a(0) + (n - 1)d

given : a(10) = a(0) + 9d & a(5) = a(0) + 4d

solving both the equation we get a(0) = 1.1 & d = 0.3

a(2) = a(0) + (2 - 1) d = 1.1 + 0.3 = 1.4
_________________

If you like the post, please award me Kudos!! It motivates me

Senior SC Moderator
Joined: 22 May 2016
Posts: 2344
On a certain number line, there are 10 marks evenly spaced. If the fi  [#permalink]

Show Tags

21 Jan 2018, 17:54
Bunuel wrote:
On a certain number line, there are 10 marks evenly spaced. If the fifth mark has a value equal to 2.3 and the tenth mark's value is equal to 3.8, then what is the value of the second mark?

A. 0.3
B. 1.1
C. 1.4
D. 1.5
E. 1.7

Attachment:

lineinterval.png [ 3.25 KiB | Viewed 475 times ]

Draw a horizontal line. Make ten vertical lines, evenly spaced.
At the fifth mark, write 2.3
At the tenth mark, write 3.8

Interval distance is total distance between 2.3 and 3.8, divided by number of intervals.

3.8 - 2.3 = 1.5
There are 5 intervals (between 2.3 and 3.8)

Interval distance: $$\frac{1.5}{5}$$ = .3

Write the rest of the values in, working from 2.3 to the left.
5th to FOURTH: 2.3 - .3 = 2.0
4th to THIRD: 2.0 - .3 = 1.7
3rd to SECOND: 1.7 - .3 = 1.4 (DONE)
That's the second mark.
(The first mark is 1.4 - .3 = 1.1.)

_________________

Never look down on anybody unless you're helping them up.
--Jesse Jackson

On a certain number line, there are 10 marks evenly spaced. If the fi &nbs [#permalink] 21 Jan 2018, 17:54
Display posts from previous: Sort by

On a certain number line, there are 10 marks evenly spaced. If the fi

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.