GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 22 Feb 2020, 04:59

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: 61385
Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 22 Apr 2018, 21:10
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

65% (02:00) correct 35% (01:56) wrong based on 209 sessions

HideShow timer Statistics

Manager
Manager
avatar
G
Joined: 24 Jun 2013
Posts: 142
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, 22:14
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
Manager
Manager
avatar
G
Joined: 30 Mar 2017
Posts: 113
GMAT 1: 200 Q1 V1
Reviews Badge
Re: Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 23 Apr 2018, 17:21
2
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 07 Sep 2019, 23:59
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
VP
VP
avatar
P
Joined: 24 Nov 2016
Posts: 1224
Location: United States
CAT Tests
Which of the following is closest in value to √7.5×32×3125?  [#permalink]

Show Tags

New post 06 Nov 2019, 04:51
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


\(\sqrt{7.5*32*3125}…\sqrt{15/2*32*3125}…\sqrt{15/2*32*3125}…\sqrt{15*16*3125}\)
\(\sqrt{3*4^2*5^2*625}…4*5*25\sqrt{3}…4*5*25*(7/4)…5*25*7\)
\(5*25*7=125*7=700+140+35=875\)

Answer (D)
GMAT Club Bot
Which of the following is closest in value to √7.5×32×3125?   [#permalink] 06 Nov 2019, 04:51
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