Find all School-related info fast with the new School-Specific MBA Forum

It is currently 22 Oct 2014, 00:22

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Ross is 3 times as old as Sam, and Sam is 3 years older than

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 01 May 2007
Posts: 795
Followers: 1

Kudos [?]: 79 [0], given: 0

Ross is 3 times as old as Sam, and Sam is 3 years older than [#permalink] New post 08 Sep 2007, 11:54
Ross is 3 times as old as Sam, and Sam is 3 years older than Tina. 2 years from now, Tina will drink from the Fountain of Youth, which will make her half as old as she was. If after drinking from the Fountain, Tina is 16 years old, how old is Ross right now?

Please try to solve and show work. Answer with explanation will follow.
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3403
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 164 [0], given: 2

Re: Manhattan GMAT Question: Ages [#permalink] New post 08 Sep 2007, 12:10
jimmyjamesdonkey wrote:
Ross is 3 times as old as Sam, and Sam is 3 years older than Tina. 2 years from now, Tina will drink from the Fountain of Youth, which will make her half as old as she was. If after drinking from the Fountain, Tina is 16 years old, how old is Ross right now?

Please try to solve and show work. Answer with explanation will follow.


lets see...

R=3S

S=3+t

2 years from now..(t+2)=1/2 t or t+2=32 which means t=30 right now..

if thats the case S=33 , then R=99 years old
Director
Director
avatar
Joined: 01 May 2007
Posts: 795
Followers: 1

Kudos [?]: 79 [0], given: 0

 [#permalink] New post 08 Sep 2007, 12:21
You are correct. I messed up this problem with a simple mistake at the end. Can you tell me where the flaw in my logic was?

I said that

(t+2)/2 = 16

So I canceled out and got...

(t+2)/1 = 8

so...

t+2 = 8

so t = 6

t=6 solves that equation, but doesn't not get us to 99. Can you tell me where my logic is failing? Why can't I cancel out in this situation?
Manager
Manager
User avatar
Joined: 08 Oct 2006
Posts: 216
Followers: 1

Kudos [?]: 5 [0], given: 0

 [#permalink] New post 08 Sep 2007, 14:20
jimmyjamesdonkey wrote:
You are correct. I messed up this problem with a simple mistake at the end. Can you tell me where the flaw in my logic was?

I said that

(t+2)/2 = 16

So I canceled out and got...

(t+2)/1 = 8

so...

t+2 = 8

so t = 6

t=6 solves that equation, but doesn't not get us to 99. Can you tell me where my logic is failing? Why can't I cancel out in this situation?


Jesus christ. How could you do the stuff in bold.
You have to multiply 2 and 16 rather than divide.
Thus t+2=32 , t=30
  [#permalink] 08 Sep 2007, 14:20
    Similar topics Author Replies Last post
Similar
Topics:
4 Experts publish their posts in the topic Today Rose is twice as old as Sam and Sam is 3 years younger arkle 9 28 Apr 2012, 15:01
Today Rose is twice as old as Sam and Sam is 3 years younger TrillTalk 4 14 Oct 2008, 17:04
Today Rose is twice as old as Sam and Sam is 3 years younger Matador 4 16 Apr 2006, 18:38
Today Rose is twice as old as Sam and Sam is 3 years younger chuckle 8 03 Apr 2006, 05:13
Ross is three times as old as Sam, and Sam is 3 years older rlevochkin 3 29 Dec 2005, 17:50
Display posts from previous: Sort by

Ross is 3 times as old as Sam, and Sam is 3 years older than

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.