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

 It is currently 13 Dec 2018, 23:50

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

Events & Promotions

Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

December 14, 2018

December 14, 2018

09:00 AM PST

10:00 AM PST

10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.
• Typical Day of a UCLA MBA Student - Recording of Webinar with UCLA Adcom and Student

December 14, 2018

December 14, 2018

10:00 PM PST

11:00 PM PST

Carolyn and Brett - nicely explained what is the typical day of a UCLA student. I am posting below recording of the webinar for those who could't attend this session.

69,300/(10^5 - 10^3)

Author Message
TAGS:

Hide Tags

Intern
Joined: 12 Feb 2016
Posts: 11

Show Tags

Updated on: 03 Oct 2018, 18:39
2
8
00:00

Difficulty:

45% (medium)

Question Stats:

67% (01:09) correct 33% (01:00) wrong based on 210 sessions

HideShow timer Statistics

69,300/(10^5 - 10^3)

A 0.693
B 0.7
C 0.71
D 6.93
E 7.1

Figured it Out!
(100000-1000)=99,000
69,300/99,000
Divide by 11 = 6,300
Dived by 9 = 7,000
Divide by 10,000 =.7

Originally posted by alextaylor116 on 26 Feb 2016, 10:06.
Last edited by generis on 03 Oct 2018, 18:39, edited 1 time in total.
Intern
Joined: 14 Jul 2015
Posts: 22
GMAT 1: 680 Q44 V40
GMAT 2: 710 Q49 V37

Show Tags

26 Feb 2016, 11:40
2
Alternatively:

Top: 693 * 100 = 3*3*7*11*100 = 2^2 * 3^2 * 5^2 * 7 * 11
Bottom: 10(10^4 - 10^2) = 10(10^2 - 10)(10^2 + 10) = 10 * 90 * 110 = 2^3 * 5^3 * 3^2 * 11

When we reduce the resulting fraction, we get 7/10 = 0.7.
Director
Joined: 04 Dec 2015
Posts: 729
Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)

Show Tags

03 Jul 2017, 01:07
4
$$\frac{69,300}{(10^5 - 10^3)}$$ $$= \frac{693 * 10^2}{10^3(10^2 - 1)}$$

$$\frac{693 * 10^2}{10^3(100 - 1)}$$ $$= \frac{693 * 10^2}{10^3*99}$$

$$\frac{693 * 10^2*10^{(-3)}}{99}$$ $$= \frac{693 * 10^{(2-3)}}{99}$$ $$= \frac{693 * 10^{(-1)}}{99}$$

$$7*10^{(-1)} = 0.7$$

Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3325
Location: India
GPA: 3.12

Show Tags

03 Jul 2017, 05:11
We need to find the value of expression $$\frac{69,300}{(10^5 - 10^3)}$$

Denominator can be simplified : $$(10^5 - 10^3) = 100000-1000 = 99000$$

The expression becomes $$\frac{69,300}{(10^5 - 10^3)}$$ = $$\frac{693 * 100}{99 * 1000}$$ = $$\frac{7}{10}$$ = 0.7(Option B)
_________________

You've got what it takes, but it will take everything you've got

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4276
Location: India
GPA: 3.5

Show Tags

03 Jul 2017, 07:55
alextaylor116 wrote:
69,300/(10^5 - 10^3)

A 0.693
B 0.7
C 0.71
D 6.93
E 7.1

$$\frac{69,300}{(10^5 - 10^3)}$$

= $$\frac{69300}{(100000 - 1000)}$$

= $$\frac{69300}{99000}$$

= $$\frac{693}{990}$$

= $$0.70$$

Thus, answer must be (B) 0.70
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Non-Human User
Joined: 09 Sep 2013
Posts: 9158

Show Tags

03 Oct 2018, 18:39
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.
_________________
Re: 69,300/(10^5 - 10^3) &nbs [#permalink] 03 Oct 2018, 18:39
Display posts from previous: Sort by