It is currently 26 Jun 2017, 14:20

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 June
Open Detailed Calendar

what am i missing here

Author Message
Director
Joined: 23 May 2008
Posts: 806
what am i missing here [#permalink]

Show Tags

15 Sep 2008, 11:56
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

what am i missing here?
Attachments

gmatprep.JPG [ 59.78 KiB | Viewed 903 times ]

Manager
Joined: 28 Aug 2008
Posts: 101

Show Tags

15 Sep 2008, 12:04
From the stem we can find that 120 miles is equal to 3/8 of the total.

Say the total was 200 miles, she stops after the first hundred, than the next 25, so she has covered 125/200 miles, the rest is 75/200 which is equal to 120 miles in this case.

The answer is 320 ... (120/4 = 30 , 30*8 =320)

B
Senior Manager
Joined: 09 Oct 2007
Posts: 466

Show Tags

15 Sep 2008, 12:06
I get 320:

First part of the trip: 1/2
Second part of the trip: (1/2)(1/4)
Last part of the trip: (1/2)(3/4) = 120
Director
Joined: 23 May 2008
Posts: 806

Show Tags

15 Sep 2008, 12:16
i was thinking that 1/2x + 1/4x + 120 = x...whats wrong with this logic?
Intern
Joined: 02 Sep 2008
Posts: 45

Show Tags

15 Sep 2008, 12:27
Hey Bigtreezl,

Let's assume total distance is x.

Maria starts driving a car. Then, after driving half distance she stops.

So, Maria first draw of half distance of x. It is x/2.

again maria draw from that middle point to another 1/4 distance so it is 1/4 * x/2 = x/8.

It is not x/4. So your equation is wrong.

True equation: x/2 + x/8 + 120 = x.
Director
Joined: 23 May 2008
Posts: 806

Show Tags

15 Sep 2008, 12:42
"1/4 of remaining distance" so 1/4 of 1/2.....got it thanks Twoone
Re: gmat prep   [#permalink] 15 Sep 2008, 12:42
Display posts from previous: Sort by