Last visit was: 20 Sep 2024, 18:24 It is currently 20 Sep 2024, 18:24
Decision Tracker
My Rewards
Unanswered
Active Topics
New posts
New comers' posts
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

Data for a certain experiment are given in the table. If the

User avatar
spiridon
Joined: 04 Aug 2008
Posts: 274
Own Kudos [?]: 125 [1]
Given Kudos: 1
Send PM
Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   23 Sep 2008, 21:00
1
Kudos
Data for a certain experiment are given in the table. If the amount of microorganism present increased by the same fraction during each of the two 3-hour periods shown, how many grams of microorganism were present at 4:00 PM?
Time Amount
1 PM 10 grams
4 PM x grams
7 PM 14.4 grams

12.0
12.1
12.2
12.3
12.4



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
bigtreezl
Joined: 23 May 2008
Posts: 367
Own Kudos [?]: 189 [0]
Given Kudos: 0
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   23 Sep 2008, 21:21
12

10/x = x/14.4

x^2=144
User avatar
spiridon
Joined: 04 Aug 2008
Posts: 274
Own Kudos [?]: 125 [0]
Given Kudos: 1
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   Updated on: 24 Sep 2008, 10:53
Yeah the trap answer I picked is 12.2

Originally posted by spiridon on 24 Sep 2008, 08:56.
Last edited by spiridon on 24 Sep 2008, 10:53, edited 1 time in total.
User avatar
FN
Current Student
Joined: 28 Dec 2004
Posts: 1578
Own Kudos [?]: 646 [0]
Given Kudos: 2
Location: New York City
Concentration: Social Enterprise
Schools:Wharton'11 HBS'12
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   24 Sep 2008, 09:32
(x-10)/10 = (14.4-x)/x

x(x-10)=10(14.4-x)

x^2-10x=144-10x

x^2=144, x=12..

spiridon
Data for a certain experiment are given in the table. If the amount of microorganism present increased by the same fraction during each of the two 3-hour periods shown, how many grams of microorganism were present at 4:00 PM?
Time Amount
1 PM 10 grams
4 PM x grams
7 PM 14.4 grams

12.0
12.1
12.2
12.3
12.4
User avatar
spiridon
Joined: 04 Aug 2008
Posts: 274
Own Kudos [?]: 125 [0]
Given Kudos: 1
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   Updated on: 24 Sep 2008, 10:49
Sorry I overlooked it

Thats the OA

everythings ok

Originally posted by spiridon on 24 Sep 2008, 10:44.
Last edited by spiridon on 24 Sep 2008, 10:49, edited 1 time in total.
User avatar
amitdgr
Joined: 30 Jun 2008
Posts: 537
Own Kudos [?]: 2826 [0]
Given Kudos: 1
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   24 Sep 2008, 10:46
spiridon
however, OA is 1.2

They solved it using some crappy period formula

1.2 ? How did you determine the answer ?
User avatar
IgnitedMind
Joined: 28 Aug 2008
Posts: 53
Own Kudos [?]: 155 [0]
Given Kudos: 0
Send PM
Re: Data for a certain experiment are given in the table. If the [#permalink] Data for a certain experiment are given in the table. If the   24 Sep 2008, 14:18
10*.2= 12
12*.2= 14.4

A is correct

The trap here is that the writers assume you will take the difference and divide by 2, this is not correct as the ratios are different

10 -> 12.2 does not equal 12.2 -> 14.4 in terms of ratios



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: Data for a certain experiment are given in the table. If the [#permalink]
24 Sep 2008, 14:18
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3127 posts