It is currently 21 Sep 2017, 03:44
Search
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Workbook Learn more
Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar
CLICK HERE TO HIDE/SHOW EVENTS

Of the following, the closest approximation to

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41652

Kudos [?]: 124261 [1], given: 12077

Premium Member CAT Tests
Top Member of the Month
Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 03:40
1
This post received
KUDOS
Expert's post
3
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

83% (00:45) correct 17% (01:02) wrong based on 518 sessions

HideShow timer Statistics

The Official Guide For GMAT® Quantitative Review, 2ND Edition

Of the following, the closest approximation to \(\sqrt{\frac{5.98(601.5)}{15.79}}\) is

(A) 5
(B) 15
(C) 20
(D) 25
(E) 225

Problem Solving
Question: 97
Category: Arithmetic Estimation
Page: 74
Difficulty: 600


GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:
1. Please provide your solutions to the questions;
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 124261 [1], given: 12077

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41652

Kudos [?]: 124261 [1], given: 12077

Premium Member CAT Tests
Top Member of the Month
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 03:40
1
This post received
KUDOS
Expert's post
SOLUTION

Of the following, the closest approximation to \(\sqrt{\frac{5.98(601.5)}{15.79}}\) is

(A) 5
(B) 15
(C) 20
(D) 25
(E) 225

\(\sqrt{\frac{5.98(601.5)}{15.79}}\approx{\sqrt{\frac{6(600)}{16}}}=\sqrt{\frac{3600}{16}}=\frac{60}{4}=15\).

Answer: B.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 124261 [1], given: 12077

1 KUDOS received
Director
Director
User avatar
Joined: 25 Apr 2012
Posts: 727

Kudos [?]: 832 [1], given: 724

Location: India
GPA: 3.21
WE: Business Development (Other)
Premium Member Reviews Badge
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 03:48
1
This post received
KUDOS
Bunuel wrote:
Of the following, the closest approximation to \(\sqrt{\frac{5.98(601.5)}{15.79}}\) is

(A) 5
(B) 15
(C) 20
(D) 25
(E) 225


Sol: We can approximate the following values as below

5.98~6
601.5~600
and 15.79~ 16 so we get \(\sqrt{6*600/16}\)

or\(\sqrt{3600/16}\) or

60/4 = 15
Ans is B.
600 level is okay
_________________


“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”

Kudos [?]: 832 [1], given: 724

1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 20 Dec 2013
Posts: 268

Kudos [?]: 106 [1], given: 29

Location: India
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 09:23
1
This post received
KUDOS
Option B.
5.98~6 & 15.79~16
=>(sqrt){6 * (601+0.5)}/16
=>(sqrt)3600/16 = 60/4=15

Posted from my mobile device

Kudos [?]: 106 [1], given: 29

1 KUDOS received
Intern
Intern
avatar
Joined: 27 Oct 2011
Posts: 27

Kudos [?]: 95 [1], given: 25

GMAT ToolKit User
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 12:06
1
This post received
KUDOS
Lets approximate 5.98 to 6, 601.5 to 600 & 15.79 to 16

so, \(\sqrt{\frac{6 * 600}{16}}\)

\(\sqrt{\frac{3600}{16}}\)

\(\frac{6*10}{4}\)

15. Option B
_________________

oblige me with Kudos.

Kudos [?]: 95 [1], given: 25

1 KUDOS received
Manager
Manager
User avatar
Status: Never Give up!!!
Joined: 03 Aug 2012
Posts: 52

Kudos [?]: 42 [1], given: 28

Location: India
Concentration: Finance, General Management
GMAT ToolKit User
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 17 Feb 2014, 22:05
1
This post received
KUDOS
Pretty Easy
Convert those decimals into integers as below:-
5.98 - 6
601.5 - 600
15.79 - 16

Then just plug in and solve you get 15 as the answer. Option (B)

Kudos [?]: 42 [1], given: 28

2 KUDOS received
Manager
Manager
User avatar
Status: GMATting
Joined: 21 Mar 2011
Posts: 108

Kudos [?]: 104 [2], given: 104

Concentration: Strategy, Technology
GMAT 1: 590 Q45 V27
GMAT ToolKit User
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 18 Feb 2014, 07:34
2
This post received
KUDOS
Approximate the following numbers:
5.98 ~ 6
601.5 ~ 600
15.79 ~ 16

\sqrt{6 * 600} = \sqrt{36 * 100} = 6 * 10
We know that \sqrt{16} = 4;

So, (6 * 10)/4 = 15;

Ans is (B)

Kudos [?]: 104 [2], given: 104

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41652

Kudos [?]: 124261 [1], given: 12077

Premium Member CAT Tests
Top Member of the Month
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 22 Feb 2014, 05:39
1
This post received
KUDOS
Expert's post
SOLUTION

Of the following, the closest approximation to \(\sqrt{\frac{5.98(601.5)}{15.79}}\) is

(A) 5
(B) 15
(C) 20
(D) 25
(E) 225

\(\sqrt{\frac{5.98(601.5)}{15.79}}\approx{\sqrt{\frac{6(600)}{16}}}=\sqrt{\frac{3600}{16}}=\frac{60}{4}=15\).

Answer: B.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 124261 [1], given: 12077

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 17583

Kudos [?]: 270 [0], given: 0

Premium Member
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 29 Apr 2015, 08:37
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 270 [0], given: 0

Ryerson (Ted Rogers) Thread Master
User avatar
Joined: 27 Sep 2015
Posts: 61

Kudos [?]: 59 [0], given: 26

Location: Canada
GMAT 1: 410 Q33 V13
WE: Management Consulting (Computer Software)
GMAT ToolKit User
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 19 Dec 2015, 11:09
Using BALLPARKING

5.98 = 6
601.5 = 600
15.79 = 16

6 * 600/16 = 3600/16 sq root = 60/4 = 15

Answer B is correct.
_________________

Discipline does not mean control. Discipline means having the sense to do exactly what is needed.

Kudos [?]: 59 [0], given: 26

Intern
Intern
avatar
Joined: 13 Apr 2017
Posts: 3

Kudos [?]: 0 [0], given: 15

Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 09 Aug 2017, 14:24
\(\sqrt{6 * 600 / 16}
= \sqrt{3600/16}
= \sqrt{225}\)
= 15

Kudos [?]: 0 [0], given: 15

Intern
Intern
User avatar
B
Joined: 21 Jun 2017
Posts: 37

Kudos [?]: 2 [0], given: 2

Of the following, the closest approximation to [#permalink]

Show Tags

New post 22 Aug 2017, 13:50
Key word in this problem is "approximation"

1. 5.98(601.5) --> approximates --> 6(602) = 3612
2. 3612/16.00 = 225, which is a perfect root
3. √225 = 15

Answer is (B) 15

Kudos [?]: 2 [0], given: 2

Expert Post
Target Test Prep Representative
User avatar
S
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1510

Kudos [?]: 766 [0], given: 2

Location: United States (CA)
Re: Of the following, the closest approximation to [#permalink]

Show Tags

New post 24 Aug 2017, 16:34
Expert's post
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

Of the following, the closest approximation to \(\sqrt{\frac{5.98(601.5)}{15.79}}\) is

(A) 5
(B) 15
(C) 20
(D) 25
(E) 225



We can approximate 5.98 to be 6, 601.5 to be 600, and 15.79 to be 16; thus, we have:

√[(6)(600)/(16)] = √(3600/16) = 60/4 = 15

Answer: B
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Kudos [?]: 766 [0], given: 2

Re: Of the following, the closest approximation to   [#permalink] 24 Aug 2017, 16:34
Print view
First unread post
    Similar topics Author Replies Last post
Similar
Topics:
 1 EXPERTS_POSTS_IN_THIS_TOPIC Of the following, which is the closest approximation of (0.011^2*4.75) Bunuel 1 08 Nov 2016, 02:11
2 EXPERTS_POSTS_IN_THIS_TOPIC Of the following answer choices, which is the closest approximation of Bunuel 2 02 Sep 2016, 07:58
EXPERTS_POSTS_IN_THIS_TOPIC Of the following, which is the closest approximation of 50.2 Ankit04041987 3 19 Dec 2012, 05:38
19 EXPERTS_POSTS_IN_THIS_TOPIC Of the following integers which is the closest approximation vannbj 11 04 May 2017, 10:43
9 EXPERTS_POSTS_IN_THIS_TOPIC Of the following integers, which is the closest approximation to djveed 12 04 Feb 2017, 08:13
Display posts from previous: Sort by

Of the following, the closest approximation to

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

Moderators: msk0657, abhimahna, Bunuel, Vyshak, Engr2012, mikemcgarry, Abhishek009, VeritasPrepKarishma, Skywalker18

Search for:


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

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions