Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 24 May 2013, 19:44
Customize  |  Hide

Search
Register
New posts
Unanswered

What is the difference between the sixth and the fifth terms

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 02 Dec 2012
Posts: 178
Followers: 1

Kudos [?]: 7 [0], given: 0

What is the difference between the sixth and the fifth terms [#permalink] New post 20 Dec 2012, 09:02
00:00

Question Stats:

73% (01:54) correct 26% (01:36) wrong based on 6 sessions
What is the difference between the sixth and the fifth terms of the sequence 2, 4, 7, ... whose nth term is n + 2^(n - 1)?

(A) 2
(B) 3
(C) 6
(D) 16
(E) 17
[Reveal] Spoiler: OA
GMAT Club team member
User avatar
Joined: 02 Sep 2009
Posts: 11611
Followers: 1801

Kudos [?]: 9597 [0], given: 829

GMAT Tests User CAT Tests
Top Member of the Month
Re: What is the difference between the sixth and the fifth terms [#permalink] New post 20 Dec 2012, 09:04
Walkabout wrote:
What is the difference between the sixth and the fifth terms of the sequence 2, 4, 7, ... whose nth term is n + 2^(n - 1)?

(A) 2
(B) 3
(C) 6
(D) 16
(E) 17


Given that a_n=n+2^{n-1}, thus:

a_6=6+2^{6-1}=38;
a_5=5+2^{5-1}=21;

The difference is 38-21=17.

Answer: E.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!


What are GMAT Club Tests?
25 extra-hard Quant Tests

Find out what's new at GMAT Club - latest features and updates

Re: What is the difference between the sixth and the fifth terms   [#permalink] 20 Dec 2012, 09:04
    Similar topics Author Replies Last post
Similar
Topics:
 New posts What is the difference between ..... Geethu 2 25 Dec 2003, 23:30
Popular new posts 1 EXPERTS_POSTS_IN_THIS_TOPIC What is the difference between Independent of and gablaze23 11 28 Jul 2007, 05:49
New posts 1 What is the difference between the lengths of diagonals of bmwhype2 7 15 Nov 2007, 08:43
New posts What is the difference between the greatest and the least of Capthan 1 21 Mar 2008, 06:16
New posts EXPERTS_POSTS_IN_THIS_TOPIC A Second or Third Look, but Not a Fourth, Fifth and Sixth mbaMissionBrianE 0 05 Oct 2011, 16:35
Display posts from previous: Sort by

What is the difference between the sixth and the fifth terms

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com