It is currently 23 Sep 2020, 17:41
My Tests

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

In the sequence of numbers

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 13352
Followers: 288

Kudos [?]: 3383 [0], given: 12186

CAT Tests
In the sequence of numbers [#permalink] New post 15 May 2018, 10:51
Expert's post
00:00

Question Stats:

95% (01:01) correct 4% (00:00) wrong based on 23 sessions
In the sequence of numbers \(x_1, x_2, x_3, x_4, x_5,\) each number after the first is twice the preceding number. If \(x_5 - x_1\) is 20, what is the value of \(x_1\) ?

A. \(\frac{4}{3}\)

B. \(\frac{5}{4}\)

C. \(2\)

D. \(\frac{5}{2}\)

E. \(4\)
[Reveal] Spoiler: OA

_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

3 KUDOS received
Active Member
Active Member
User avatar
Joined: 07 Jan 2018
Posts: 694
Followers: 11

Kudos [?]: 770 [3] , given: 88

Re: In the sequence of numbers [#permalink] New post 16 May 2018, 06:13
3
This post received
KUDOS
From the question,

x1 = x1
x2 = 2x1
x3 = 4x1
x4 = 8x1
x5 = 16x1


Also x5 -x1 = 20; we can rewrite it as:

16x1 - x1 = 20
or, 15x1 = 20
therefore x1 = \(\frac{20}{15}\) which reduces to \(\frac{4}{3}\)
option A
_________________

This is my response to the question and may be incorrect. Feel free to rectify any mistakes
Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos

Re: In the sequence of numbers   [#permalink] 16 May 2018, 06:13
Display posts from previous: Sort by

In the sequence of numbers

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.