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

It is currently 20 Oct 2014, 04:09

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

If Fran jumps straight up off the floor and lands on her

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 11 Jan 2007
Posts: 204
Location: Bangkok
Followers: 1

Kudos [?]: 3 [0], given: 0

If Fran jumps straight up off the floor and lands on her [#permalink] New post 04 Feb 2007, 07:17
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 0 sessions
1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of 1.22T^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Fran’s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending.


2.Are all of the numbers in a certain list of 15 numbers equal?
(1) The sum of all of the numbers in the list is 60.
(2) The sum of any 3 numbers in the list is 12.


3.The price of a television set was reduced by 25 percent. What was its original price?
(1) The reduced price was $187.50.
(2) The original price exceeded the reduced price by more than $60.00.
_________________

cool

Senior Manager
Senior Manager
User avatar
Joined: 04 Jan 2006
Posts: 280
Followers: 1

Kudos [?]: 18 [0], given: 0

Re: DS [#permalink] New post 04 Feb 2007, 16:56
jet1445 wrote:
1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of 1.22T^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Fran’s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending.


Question: Max H = 1.22 * T^2, Is T < 1?

(1) Max H = 1 = 1.22 * T^2

T = 1/sqrt(1.22) = 1/(1...) Thus T <1> 1/4
T < 2/4
T < 1/2 Thus T < 1 (2) SUFF

D. is the answer.
Senior Manager
Senior Manager
User avatar
Joined: 04 Jan 2006
Posts: 280
Followers: 1

Kudos [?]: 18 [0], given: 0

Re: DS [#permalink] New post 04 Feb 2007, 17:11
jet1445 wrote:
2.Are all of the numbers in a certain list of 15 numbers equal?
(1) The sum of all of the numbers in the list is 60.
(2) The sum of any 3 numbers in the list is 12.


Question: set A = {a1, a2, ..., a15} , is a1 = a2 = ... = a15?

(1) Sum(A) = 60, Thus Ave(A) = 60/15 = 4
This does not mean that all a1 ... a15 is equal INSUFF

(2) The sum of any 3 numbers in the list is 12
or the sum of any 3 number in the list is 3x(4)
To pick any number and still get the same result, the numbers in the set must be the same. a1 = 4 SUFF.

B. is the answer.

Last edited by devilmirror on 04 Feb 2007, 17:21, edited 1 time in total.
Senior Manager
Senior Manager
User avatar
Joined: 04 Jan 2006
Posts: 280
Followers: 1

Kudos [?]: 18 [0], given: 0

Re: DS [#permalink] New post 04 Feb 2007, 17:14
jet1445 wrote:
3.The price of a television set was reduced by 25 percent. What was its original price?
(1) The reduced price was $187.50.
(2) The original price exceeded the reduced price by more than $60.00.


Question: P = orginal price, The reduced price price = 0.75P, Find P

(1) 0.75P = 187.50, P has value SUFF

(2) P - 0.75P > 60

P(1-0.75) > 60

P > 60/0.25 = 60 x 4 = 240 P has more than 1 value INSUFF

A. is the answer.
Manager
Manager
avatar
Joined: 11 Jan 2007
Posts: 204
Location: Bangkok
Followers: 1

Kudos [?]: 3 [0], given: 0

DS [#permalink] New post 05 Feb 2007, 08:48
Sorry, I type first quention incorrect , so I post again for your explaination

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of (1.22T)^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Fran’s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending.
_________________

cool

VP
VP
User avatar
Joined: 09 Jan 2007
Posts: 1045
Location: New York, NY
Schools: Chicago Booth Class of 2010
Followers: 10

Kudos [?]: 156 [0], given: 3

Re: DS [#permalink] New post 05 Feb 2007, 09:22
jet1445 wrote:
Sorry, I type first quention incorrect , so I post again for your explaination

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of (1.22T)^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Fran’s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending.



With or without the correction I would say it is A:

number 1) gives the height, so we can determine the time spent on the whole jump. SUFF

The 2) says that Fran ascended more than 1/4 seconds, it could have been: 3/8 seconds, 1/2 or even 1 second ascending. INSUFF
Re: DS   [#permalink] 05 Feb 2007, 09:22
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic If Fran jumps straight up off the floor and lands on her fee Bunuel 2 24 Feb 2014, 01:20
4 Experts publish their posts in the topic Crash Landing at 560, Plan for Next Take off ? nikhiil 11 16 Jul 2013, 15:39
multiple jumps by fran blover 2 08 Oct 2008, 00:53
On an airport landing strip, there is straight row of ten Titleist 3 18 Oct 2005, 17:15
Steve is on floor 11 of an elevator and goes up at a rate of mike8c 4 30 Nov 2004, 21:13
Display posts from previous: Sort by

If Fran jumps straight up off the floor and lands on her

  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®.