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

 It is currently 28 May 2020, 14:59

### 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

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

# Which of the following is the closest approximation to

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 64216
Which of the following is the closest approximation to  [#permalink]

### Show Tags

16 Jun 2019, 23:50
00:00

Difficulty:

85% (hard)

Question Stats:

44% (02:02) correct 56% (02:16) wrong based on 98 sessions

### HideShow timer Statistics

Which of the following is the closest approximation to $$[\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]$$?

A. 10
B. 15
C. 20
D. 25
E. 30

_________________
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 6277
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Which of the following is the closest approximation to  [#permalink]

### Show Tags

17 Jun 2019, 08:08
1
$$[\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}] 8*15/(2+4) = 20 IMO C Bunuel wrote: Which of the following is the closest approximation to [m][\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]$$?

A. 10
B. 15
C. 20
D. 25
E. 30
Manager
Joined: 26 Mar 2019
Posts: 154
Re: Which of the following is the closest approximation to  [#permalink]

### Show Tags

17 Jun 2019, 12:12
1
1
Here we have can see that √ of 73 is close to 81 rather than 64 so the closest value for it would be 9. Similarly √ of 239 is closest to the value of √ of 225, i.e 15.

Hence 9*15/2+4 = 19.28 which is closest to 20. So IMO : it's C
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 10581
Location: United States (CA)
Re: Which of the following is the closest approximation to  [#permalink]

### Show Tags

19 Jun 2019, 17:37
Bunuel wrote:
Which of the following is the closest approximation to $$[\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]$$?

A. 10
B. 15
C. 20
D. 25
E. 30

15.5 x 8.5 = 131.75 or about 130

3 + 4 = 7

Thus,

_________________

# Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
202 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

VP
Joined: 18 Dec 2017
Posts: 1364
Location: United States (KS)
GMAT 1: 600 Q46 V27
Re: Which of the following is the closest approximation to  [#permalink]

### Show Tags

07 Aug 2019, 21:49
1
Bunuel wrote:
Which of the following is the closest approximation to $$[\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]$$?

A. 10
B. 15
C. 20
D. 25
E. 30

I calculated the lowest and highest possible values of the expressions.
Lowest means (8*15)/(2+3) and highest means (9*16)/(3+4). The results are 24 and 20.XX. So the closest approximation is 20.

P.S: 25 cannot be the answer as the max value is 24 so C it is
_________________
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long

Why You Don’t Deserve A 700 On Your GMAT

Learn from the Legend himself: All GMAT Ninja LIVE YouTube videos by topic
You are missing on great learning if you don't know what this is: Project SC Butler
Re: Which of the following is the closest approximation to   [#permalink] 07 Aug 2019, 21:49