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

It is currently 21 Oct 2019, 08:09

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

Which of the following is closest in value to √7.5×32×3125?

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

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58415
Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 22 Apr 2018, 22:10
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

64% (02:01) correct 36% (01:54) wrong based on 151 sessions

HideShow timer Statistics

Manager
Manager
avatar
G
Joined: 24 Jun 2013
Posts: 144
Location: India
Schools: ISB '20, GMBA '20
GMAT ToolKit User
Re: Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 22 Apr 2018, 23:14
1
1
Bunuel wrote:
Which of the following is closest in value to \(\sqrt{7.5*32*3125}\)?

A. 75
B. 85
C. 750
D. 850
E. 7500


32*7.5 = 240 , factoring 240 = 4^2 * 3 * 5

3125 = 5 * 25* 25

so solving = \(\sqrt{4^2 * 5^2 * 3 * 25^2}\)

= 500 \(\sqrt{3}\)= 860 , so D is closest hence ans
_________________
If this post helped you learn something pls give kudos
Manager
Manager
avatar
G
Joined: 30 Mar 2017
Posts: 125
GMAT 1: 200 Q1 V1
Reviews Badge CAT Tests
Re: Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 23 Apr 2018, 18:21
1
Bunuel wrote:
Which of the following is closest in value to \(\sqrt{7.5*32*3125}\)?

A. 75
B. 85
C. 750
D. 850
E. 7500


We can approximate

\(\sqrt{7.5*32*32*100}=320\sqrt{7.5}\)

\(\sqrt{7.5}\) approx 2.6

\(32*26=832\)

Answer: D
Intern
Intern
avatar
Joined: 30 Aug 2019
Posts: 8
Re: Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 08 Sep 2019, 00:59
32: 4*4*2
3125: 25*25*5
4*25 out of the roots and 7.5*2*5 inside the root
= 75
75: 25*3
4*25*5 out and 3 inside
= 500*root of 3 =1.73*500 = 865 = d
GMAT Club Bot
Re: Which of the following is closest in value to √7.5×32×3125?   [#permalink] 08 Sep 2019, 00:59
Display posts from previous: Sort by

Which of the following is closest in value to √7.5×32×3125?

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





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne