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

It is currently 24 Oct 2014, 16:58

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

Q1: A parking garage has places for a c ertain number of

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 01 Jun 2006
Posts: 77
Followers: 1

Kudos [?]: 1 [0], given: 0

Q1: A parking garage has places for a c ertain number of [#permalink] New post 10 Sep 2006, 06:23
Q1: A parking garage has places for a c ertain number of cars. If 1/5 of the places are left empty, and 2/5 of the places are used by compact cars, non-compact cars take up what fraction of the filled spaces in the garage.

A) 1/3 B) 2/5 C) 1/2 D) 3/5 E) 4/5

I solved the question as follows:

4/5 of the places are not empty and 4/5-2/5 will give us the fraction non-compact cars i.e. 2/5. However the answer is 1/2. If i plug in, I get the right answer i.e. 1/2 but why cant I solve it using the above method?

Can somebody explain and solve the question with the ratios as done above without plugin in.


Q2 If p and q are integers, such that p<0<q, and s is a non negative integer, which of the following must be true?

A) p^2 < q^2 B) P + q = 0 C) sp < sq D) sp (is not =) sq E) p/q < s

I was getting multiple true statements. Please solve...
VP
VP
avatar
Joined: 28 Mar 2006
Posts: 1388
Followers: 2

Kudos [?]: 19 [0], given: 0

Re: Help needed on the following questions [#permalink] New post 10 Sep 2006, 06:44
usman7 wrote:
Q1: A parking garage has places for a c ertain number of cars. If 1/5 of the places are left empty, and 2/5 of the places are used by compact cars, non-compact cars take up what fraction of the filled spaces in the garage.

A) 1/3 B) 2/5 C) 1/2 D) 3/5 E) 4/5

I solved the question as follows:

4/5 of the places are not empty and 4/5-2/5 will give us the fraction non-compact cars i.e. 2/5. However the answer is 1/2. If i plug in, I get the right answer i.e. 1/2 but why cant I solve it using the above method?

Can somebody explain and solve the question with the ratios as done above without plugin in.


Q2 If p and q are integers, such that p<0<q, and s is a non negative integer, which of the following must be true?

A) p^2 < q^2 B) P + q = 0 C) sp < sq D) sp (is not =) sq E) p/q < s

I was getting multiple true statements. Please solve...


For qestion 1)
2/5 are used by non compact cars

the garage is filled up to 4/5 it capacity

So 2/5 / 4/5 = 1/2

For question 2)

Posted: Sun Sep 10, 2006 6:23 am Post subject: Help needed on the following questions

--------------------------------------------------------------------------------

Q1: A parking garage has places for a c ertain number of cars. If 1/5 of the places are left empty, and 2/5 of the places are used by compact cars, non-compact cars take up what fraction of the filled spaces in the garage.

A) 1/3 B) 2/5 C) 1/2 D) 3/5 E) 4/5

I solved the question as follows:

4/5 of the places are not empty and 4/5-2/5 will give us the fraction non-compact cars i.e. 2/5. However the answer is 1/2. If i plug in, I get the right answer i.e. 1/2 but why cant I solve it using the above method?

Can somebody explain and solve the question with the ratios as done above without plugin in.


Q2 If p and q are integers, such that p<0<q, and s is a non negative integer, which of the following must be true?

A) p^2 < q^2 B) P + q = 0 C) sp < sq D) sp (is not =) sq E) p/q < s


A ---if p=-5 and q=1 A fails

B----Need not necessarily

C----Need not necessarily True since p<q and s being a non negetive int it might be 0

D----Not True since p is -ve and q is +ve but S might be 0

E---since S is always either 0 or + ve int
VP
VP
User avatar
Joined: 02 Jun 2006
Posts: 1270
Followers: 2

Kudos [?]: 39 [0], given: 0

 [#permalink] New post 10 Sep 2006, 06:56
Prob1:

Let total space = S
Empty = S/5
Compact = 2S/5
Non-Compact = 2S/5

Total filled = Compact + Non-Compact
= 4S/5

Fraction = Non-Compact/Total Filled
(Not Total Filled - NonCompact)
= (2S/5)/(4S/5) = 1/2

Prob2:
Used a plug in strategy on this..

Given p < 0 < q, s is non -ve integer (could be zero).

Use p = -5 q = 2, s = 0
Only E is satisfied.

Answer: E
SVP
SVP
User avatar
Joined: 05 Jul 2006
Posts: 1541
Followers: 5

Kudos [?]: 84 [0], given: 39

 [#permalink] New post 10 Sep 2006, 07:01
first question:

filled space = 4/5 of the garage space

space left for non compat cars = 2/5
fraction of the filled spaces in the garage filled by non compat = (2/5)/ (4/5) = 1/2

Second question:

If p and q are integers, such that p<0<q, and s is a non negative integer, which of the following must be true?

A) p^2 < q^2 B) P + q = 0 C) sp < sq D) sp (is not =) sq E) p/q < s

E is the only possible answer

I know that u suspected

c,d,e

for c,d ,e if u assumed that s = zero only e survives


hope that helps
Manager
Manager
avatar
Joined: 01 Jun 2006
Posts: 77
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 11 Sep 2006, 02:14
Thanks a lot everybody...Now i see the stupid mistakes i was making...I wasnt taking s=0 and also didnt understand the q1...although tried to solve it multiple times but guess....i was caught up in my own narrow view...

thanks once again...
  [#permalink] 11 Sep 2006, 02:14
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic A CEO is building an extra-wide garage in which to park his Asifpirlo 2 21 Aug 2013, 16:56
1 A number n has the prime factors a, b, and c, and only these actleader 3 06 Nov 2012, 21:59
7 Experts publish their posts in the topic A parking garage has places for a certain number of cars. If cano 8 17 Sep 2010, 00:05
12 A particular parking garage is increasing its rates by 15 pe tejal777 9 30 Oct 2009, 14:24
If convex polygon C has 7 sides, then the number of distinct kevincan 6 01 Sep 2006, 13:27
Display posts from previous: Sort by

Q1: A parking garage has places for a c ertain number of

  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®.