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

It is currently 20 May 2013, 08:15
Customize  |  Hide

Search
Register
New posts
Unanswered

Am I supposed to memorize SQRTs?

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 21 May 2012
Posts: 53
Location: United States (CA)
Concentration: Marketing, Operations
Schools: Anderson FEMBA '16, Marshall PM '16
Followers: 1

Kudos [?]: 11 [0], given: 0

Am I supposed to memorize SQRTs? [#permalink] New post 31 May 2012, 13:46
Are we expected to know sqrt of non-perfect squares?

I'm doing a MGMAT problem which required me to have knowledge of what sqrt2 and sqrt3 is. I can generally estimate but didn't know that they were ~1.7 and ~1.4. When I generally estimated I could make an educated guess but the problem is that the answer choices were so close that it was hard to guess.

Basically I needed to be able to estimate

\frac{sqrt3-sqrt2}{1}

Answers had 20%, 25%, 30%, 35%, 40% as choices.
Manhattan GMAT Discount CodesKaplan GMAT Prep Discount CodesVeritas Prep GMAT Discount Codes
Manager
Manager
Joined: 29 Mar 2012
Posts: 244
Location: India
GMAT 1: 640 Q50 V26
GMAT 2: 660 Q50 V28
GMAT 3: 730 Q50 V38
Followers: 10

Kudos [?]: 50 [0], given: 20

GMAT ToolKit User GMAT Tests User
Re: Am I supposed to memorize SQRTs? [#permalink] New post 01 Jun 2012, 01:09
Cares wrote:
Are we expected to know sqrt of non-perfect squares?

I'm doing a MGMAT problem which required me to have knowledge of what sqrt2 and sqrt3 is. I can generally estimate but didn't know that they were ~1.7 and ~1.4. When I generally estimated I could make an educated guess but the problem is that the answer choices were so close that it was hard to guess.

Basically I needed to be able to estimate

\frac{sqrt3-sqrt2}{1}

Answers had 20%, 25%, 30%, 35%, 40% as choices.


Hi Cares,

You may remember the following square roots:
\sqrt{2}=1.41
\sqrt{3}=1.73
\sqrt{5}=2.24
\sqrt{6}=2.45
\sqrt{7}=2.65
\sqrt{8}=2.83
\sqrt{10}=3.16,

but I believe that in GMAT there won't be any questions requiring the decimal values of square roots. Also, there are no close enough choices in GMAT.
_________________

My posts: Solving Inequalities, Solving Simultaneous equations, Divisibility Rules

My story: 640 What a blunder!

My page: Ed Prep

GMAT Club team member
User avatar
Joined: 02 Sep 2009
Posts: 11519
Followers: 1794

Kudos [?]: 9545 [0], given: 826

GMAT Tests User CAT Tests
Top Member of the Month
Re: Am I supposed to memorize SQRTs? [#permalink] New post 01 Jun 2012, 02:39
Cares wrote:
Are we expected to know sqrt of non-perfect squares?

I'm doing a MGMAT problem which required me to have knowledge of what sqrt2 and sqrt3 is. I can generally estimate but didn't know that they were ~1.7 and ~1.4. When I generally estimated I could make an educated guess but the problem is that the answer choices were so close that it was hard to guess.

Basically I needed to be able to estimate

\frac{sqrt3-sqrt2}{1}

Answers had 20%, 25%, 30%, 35%, 40% as choices.


For GMAT it's good to memorize following values:
\sqrt{2}\approx{1.41}
\sqrt{3}\approx{1.73}
\sqrt{5}\approx{2.24}
\sqrt{6}\approx{2.45}
\sqrt{7}\approx{2.65}
\sqrt{8}\approx{2.83}
\sqrt{10}\approx{3.16}

Check Number Theory chapter of Math Book: math-number-theory-88376.html

Hope it helps.
_________________

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: Am I supposed to memorize SQRTs?   [#permalink] 01 Jun 2012, 02:39
    Similar topics Author Replies Last post
Similar
Topics:
 New posts What am I missing, here? If x<0, then the sqrt of -x* the uphillclimb 5 05 Oct 2007, 06:23
New posts 8 EXPERTS_POSTS_IN_THIS_TOPIC Should I be memorizing theory, or doing problems? VictoryMBA 8 19 May 2008, 13:10
Popular new posts 103 EXPERTS_POSTS_IN_THIS_TOPIC What arithmetic should I memorize? topher 52 25 Jun 2009, 21:39
New posts Memorization? hurleycr 3 20 Jan 2011, 12:59
New posts I know that modifiers are supposed to touch the noun the tomcal36dc 1 30 Jun 2011, 10:03
Display posts from previous: Sort by

Am I supposed to memorize SQRTs?

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

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