GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 18 Dec 2018, 13:29

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.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • Happy Christmas 20% Sale! Math Revolution All-In-One Products!

     December 20, 2018

     December 20, 2018

     10:00 PM PST

     11:00 PM PST

    This is the most inexpensive and attractive price in the market. Get the course now!
  • Key Strategies to Master GMAT SC

     December 22, 2018

     December 22, 2018

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

Of the following, the closest approximation to

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51280
Of the following, the closest approximation to  [#permalink]

Show Tags

New post 17 Feb 2014, 02:40
2
4
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

87% (00:49) correct 13% (00:59) wrong based on 629 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!

_________________

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

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51280
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 17 Feb 2014, 02:40
3
Director
Director
User avatar
Joined: 25 Apr 2012
Posts: 683
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, 02:48
1
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.”

Manager
Manager
avatar
Joined: 20 Dec 2013
Posts: 230
Location: India
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 17 Feb 2014, 08:23
1
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
Intern
Intern
avatar
Joined: 27 Oct 2011
Posts: 22
GMAT ToolKit User
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 17 Feb 2014, 11:06
1
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.

Intern
Intern
User avatar
Status: Never Give up!!!
Joined: 02 Aug 2012
Posts: 47
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, 21:05
1
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)
Manager
Manager
User avatar
Status: GMATting
Joined: 21 Mar 2011
Posts: 105
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, 06:34
2
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)
Ryerson (Ted Rogers) Thread Master
User avatar
Joined: 27 Sep 2015
Posts: 57
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, 10:09
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.

Intern
Intern
avatar
Joined: 13 Apr 2017
Posts: 3
Location: United States
Concentration: General Management, Marketing
GPA: 3.9
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 09 Aug 2017, 13:24
\(\sqrt{6 * 600 / 16}
= \sqrt{3600/16}
= \sqrt{225}\)
= 15
Manager
Manager
User avatar
B
Joined: 21 Jun 2017
Posts: 84
Of the following, the closest approximation to  [#permalink]

Show Tags

New post 22 Aug 2017, 12:50
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
Target Test Prep Representative
User avatar
P
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 4317
Location: United States (CA)
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 24 Aug 2017, 15:34
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

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9206
Premium Member
Re: Of the following, the closest approximation to  [#permalink]

Show Tags

New post 29 Nov 2018, 16:56
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

GMAT Club Bot
Re: Of the following, the closest approximation to &nbs [#permalink] 29 Nov 2018, 16:56
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  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.