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

It is currently 28 Jul 2015, 02:37
GMAT Club Tests

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

Upon melting, ice loses 8% of its volume. Ice cubes, the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1266
Location: Madrid
Followers: 25

Kudos [?]: 169 [0], given: 0

Upon melting, ice loses 8% of its volume. Ice cubes, the [#permalink] New post 26 Jul 2006, 03:32
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Upon melting, ice loses 8% of its volume. Ice cubes, the edges of which all measure 2 cm, are added to a jug containing 5 L, or 5,000 cubic centimetres of hot water. How many ice cubes were added?

(1) When the ice cubes melt, the jug contains between 5.98 L and 6.02 L of cold water.
(2) The number of ice cubes added is an even number.
Manager
Manager
avatar
Joined: 21 Jul 2006
Posts: 83
Followers: 1

Kudos [?]: 9 [0], given: 0

Re: DS: Ice cubes [#permalink] New post 26 Jul 2006, 07:25
kevincan wrote:
Upon melting, ice loses 8% of its volume. Ice cubes, the edges of which all measure 2 cm, are added to a jug containing 5 L, or 5,000 cubic centimetres of hot water. How many ice cubes were added?

(1) When the ice cubes melt, the jug contains between 5.98 L and 6.02 L of cold water.
(2) The number of ice cubes added is an even number.


Volume of the Cube = 8 cubic cm
Volume of water added if cube melts = 6.8 cubic cm.

5000 + n*6.8 = 5980 n =14
5000+ n*6.8 = 6020 n =15

From St1. & St2 its 14
CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2910
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 19

Kudos [?]: 138 [0], given: 0

 [#permalink] New post 26 Jul 2006, 12:04
E

Let x = number of ice cubes addded

Volume before ice cubes started meting = B = 8x + 5000
Volume after ice cubes melted = A = 7.36x + 5000

St1: 5980 <A < 6020
i.e 980 < 7.36x < 1020
x coul dbe anything between 134 and 138 (Both inclusive.)

St2: Clearly INSUFF

Combined:

x could be 134, 136 or 138. : INSUFF
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1266
Location: Madrid
Followers: 25

Kudos [?]: 169 [0], given: 0

 [#permalink] New post 26 Jul 2006, 12:28
I know you're a mighty calculator, but how can we conclude that the answer is indeed E without so much calculating?
CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2910
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 19

Kudos [?]: 138 [0], given: 0

 [#permalink] New post 26 Jul 2006, 12:50
kevincan wrote:
I know you're a mighty calculator, but how can we conclude that the answer is indeed E without so much calculating?


I don't know the trick but I did a division of 98000/736 and 102000/736 and came up with 134 and 138. This is not a big calculation. The whole question took around 3 minutes.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Director
Director
User avatar
Joined: 28 Dec 2005
Posts: 755
Followers: 1

Kudos [?]: 8 [0], given: 0

Re: DS: Ice cubes [#permalink] New post 26 Jul 2006, 13:40
kevincan wrote:
Upon melting, ice loses 8% of its volume. Ice cubes, the edges of which all measure 2 cm, are added to a jug containing 5 L, or 5,000 cubic centimetres of hot water. How many ice cubes were added?

(1) When the ice cubes melt, the jug contains between 5.98 L and 6.02 L of cold water.
(2) The number of ice cubes added is an even number.



total volume before the cubes melt = 8n + 5000
total volume after the cubes melt = 8.(0.92)n + 5000 = 7.36n+ 5000

5980<7.36n+5000<6020
=>
980<7.36n<6020
133.something < n < 138.something....

A is insuff

B is insuff

Combining, n could be 134, 136,138....insuff so E
GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1266
Location: Madrid
Followers: 25

Kudos [?]: 169 [0], given: 0

 [#permalink] New post 26 Jul 2006, 14:14
Great! E is the OA, but we could do with a better explanation!

Hint: How many cubic centimeters are there between 5.98L and 6.02L?
Manager
Manager
avatar
Joined: 21 Jul 2006
Posts: 83
Followers: 1

Kudos [?]: 9 [0], given: 0

Re: DS: Ice cubes [#permalink] New post 26 Jul 2006, 16:09
ghantark wrote:
kevincan wrote:
Upon melting, ice loses 8% of its volume. Ice cubes, the edges of which all measure 2 cm, are added to a jug containing 5 L, or 5,000 cubic centimetres of hot water. How many ice cubes were added?

(1) When the ice cubes melt, the jug contains between 5.98 L and 6.02 L of cold water.
(2) The number of ice cubes added is an even number.


Volume of the Cube = 8 cubic cm
Volume of water added if cube melts = 6.8 cubic cm.

5000 + n*6.8 = 5980 n =14
5000+ n*6.8 = 6020 n =15

From St1. & St2 its 14


my bad. stupid calculations....pls ignore my response.
thx
Senior Manager
Senior Manager
avatar
Joined: 12 Mar 2006
Posts: 367
Schools: Kellogg School of Management
Followers: 2

Kudos [?]: 38 [0], given: 3

 [#permalink] New post 26 Jul 2006, 18:14
kevincan wrote:
Great! E is the OA, but we could do with a better explanation!

Hint: How many cubic centimeters are there between 5.98L and 6.02L?



0.04/0.92 = n*8e-3 => n > 5 which means there will be atleast 5 integer values for the number of cubes in the range specified....

yes we need to keep looking for shortcuts....nice one kevin..
Intern
Intern
avatar
Joined: 01 Jul 2006
Posts: 18
Followers: 0

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

 [#permalink] New post 26 Jul 2006, 18:20
Upon melting, ice loses 8% of its volume. Ice cubes, the edges of which all measure 2 cm, are added to a jug containing 5 L, or 5,000 cubic centimetres of hot water. How many ice cubes were added?

(1) When the ice cubes melt, the jug contains between 5.98 L and 6.02 L of cold water.
(2) The number of ice cubes added is an even number.

range of approx = 6.02 - 5.98 = 0.04L = 40 cubic cm..
volume of one cube = approx 7.2 cubic cm.. ( 2^3 * 92%)


statement 1 - not sufficient , range of approximation could vary the results from 1 to 5 additional cubes

statement 2 - not sufficicent - range of approx could vary the results between 2 or 4 additional cubes

together not sufficient

hence E
  [#permalink] 26 Jul 2006, 18:20
Display posts from previous: Sort by

Upon melting, ice loses 8% of its volume. Ice cubes, the

  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®.