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, 18:03
Customize  |  Hide

Search
Register
New posts
Unanswered

(2^2-1)(2^2+1)(2^4+1)(2^8+1)=

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 16 Feb 2012
Posts: 214
Concentration: Finance, Economics
Followers: 4

Kudos [?]: 18 [0], given: 93

(2^2-1)(2^2+1)(2^4+1)(2^8+1)= [#permalink] New post 05 Jul 2012, 02:26
00:00

Question Stats:

86% (01:50) correct 13% (02:03) wrong based on 0 sessions
(2^2-1)(2^2+1)(2^4+1)(2^8+1)=

A. 2^16 - 1
B. 2^16 + 1
C. 2^32 - 1
D. 2^128 - 1
E. 2^16(2^16-1)
[Reveal] Spoiler: OA

_________________

Kudos if you like the post!

Failing to plan is planning to fail.


Last edited by Bunuel on 05 Jul 2012, 02:53, edited 1 time in total.
Edited the question.
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: (2^2-1)(2^2+1)(2^4+1)(2^8+1)= [#permalink] New post 05 Jul 2012, 02:55
Stiv wrote:
(2^2-1)(2^2+1)(2^4+1)(2^8+1)=

A. 2^16 - 1
B. 2^16 + 1
C. 2^32 - 1
D. 2^128 - 1
E. 2^16(2^16-1)


Apply (a-b)(a+b)=a^2-b^2:

(2^2-1)(2^2+1)(2^4+1)(2^8+1)=(2^4-1)(2^4+1)(2^8+1)=(2^8-1)(2^8+1)=2^{16}-1.

Answer: A.

Hope it's clear.
_________________

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: (2^2-1)(2^2+1)(2^4+1)(2^8+1)=   [#permalink] 05 Jul 2012, 02:55
    Similar topics Author Replies Last post
Similar
Topics:
 New posts 2^2-1)(2^2+1)(2^4+1)(2^8+1) a 2^16-1 b 2^16+1 c 2^32-1 d over13 5 03 Feb 2005, 02:02
New posts 2^2)-1))((2^2)+1))((2^4)+1))((2^8)+1))= A) (2^16)-1 B) SimaQ 1 26 Nov 2006, 05:35
New posts 2^2-1)(2^2+1)(2^4+1)(2^8+1) = ? A) 2^16-1 B) 2^16+1 C) nervousgmat 3 28 Jul 2007, 14:38
New posts 2^2-1)(2^2+1)(2^4+1)(2^8+1)= 2^16-1 2^16+1 2^32-1 young_gun 1 10 Oct 2007, 20:52
Display posts from previous: Sort by

(2^2-1)(2^2+1)(2^4+1)(2^8+1)=

  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