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

 It is currently 06 May 2015, 12:23

### 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

# A faulty clock is set to the correct time at 12:00 noon. If

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Eternal Intern
Joined: 07 Jun 2003
Posts: 470
Location: Lone Star State
Followers: 1

Kudos [?]: 44 [0], given: 0

A faulty clock is set to the correct time at 12:00 noon. If [#permalink]  16 Jul 2003, 17:00
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:03) correct 0% (00:00) wrong based on 0 sessions
A faulty clock is set to the correct time at 12:00 noon. If the clock gains 5 minutes per hour, what is the correct time when the faulty clock indicates that 13 hours have passed?

Explanations , needed!
Manager
Joined: 05 May 2003
Posts: 68
Followers: 1

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

[#permalink]  16 Jul 2003, 18:39

Clock time. Actual time

1:05 - 1
2:10 - 2
3:15 - 3
4:20 - 4
5:25 - 5
6:30 - 6
7:35 - 7
8:40 - 8
9:45 - 9
10:50 - 10
11:55 - 11
13:00 - 12
SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

[#permalink]  16 Jul 2003, 22:10
13*5=65 minutes gained in total

12+13=25, so the clock shows 1:00 of the next day
Yet, we have to subtract the gained time of 1 hour and 5 minutes

Minus 1 hour = midnight
minus 5 minutes = 23:55 that is the correct time
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 13

Kudos [?]: 52 [0], given: 0

[#permalink]  16 Jul 2003, 22:16
stolyar wrote:
13*5=65 minutes gained in total

12+13=25, so the clock shows 1:00 of the next day
Yet, we have to subtract the gained time of 1 hour and 5 minutes

Minus 1 hour = midnight
minus 5 minutes = 23:55 that is the correct time

KSS is correct. His simple table shows how the two clocks move together. Also, since the fast clock is moving 13/12 times that of correct time. In 12 hours, the faulty clock will show 13 hours.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

[#permalink]  16 Jul 2003, 22:29
so, actually 60 minutes gained, not 65.
but why? where is a mistake in my reasoning?
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 13

Kudos [?]: 52 [0], given: 0

[#permalink]  16 Jul 2003, 22:30
The actual time that went by is 12, not 13 hours. Hence, you gain 12*5 = 60 minute for an "apparent" elapsed time of 13 hours.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

[#permalink]  16 Jul 2003, 22:37
Eternal Intern
Joined: 07 Jun 2003
Posts: 470
Location: Lone Star State
Followers: 1

Kudos [?]: 44 [0], given: 0

Here is the Problem [#permalink]  17 Jul 2003, 06:37
I thought when it said gain; it meant only five minutes passed by an hour. I think ETS should have worded; the faulty clock gained an additional five minutes per hour instead of a gain of five minutes per hour.
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 13

Kudos [?]: 52 [0], given: 0

[#permalink]  17 Jul 2003, 10:18
Thats is what a GAIN is. Same as a percentage INCREASE.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

SVP
Joined: 30 Oct 2003
Posts: 1797
Location: NewJersey USA
Followers: 5

Kudos [?]: 41 [0], given: 0

[#permalink]  24 Jan 2004, 10:32
In one Hr ( 60 Mins ) the gain is 5 minutes so after N hrs or N * 60 minutes the gain will be N * 5 minutes. So

N*60 + N*5 = 13 * 60
65 * N = 13 * 60
N = 13 * 60 / 65 = 12 Hrs
[#permalink] 24 Jan 2004, 10:32
Similar topics Replies Last post
Similar
Topics:
6 At 12:00 noon, a machine, operating at a fixed rate, starts processing 8 11 Mar 2015, 03:59
12 A wall clock gains 2 mins in 12 hrs, while a table clock 18 31 Aug 2010, 05:43
9 There are how many hours between x minutes past 12 noon and 6 09 Jun 2009, 19:24
The average of temperatures at noon time from Monday to 3 11 Oct 2005, 08:33
1 The average temperatures at noon time from Monday to Friday 4 05 Oct 2005, 01:55
Display posts from previous: Sort by

# A faulty clock is set to the correct time at 12:00 noon. If

 Question banks Downloads My Bookmarks Reviews Important topics

 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®.