NEW HERE? LEARN MORE
closeclose
Last visit was: 26 Apr 2024, 09:06 It is currently 26 Apr 2024, 09:06
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

Here's another one I picked off the Beginners forum. It's a

User avatar
ywilfred
SVP
SVP
Joined: 07 Jul 2004
Posts: 2004
Own Kudos [?]: 1899 [0]
Given Kudos: 0
Location: Singapore
Send PM
Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 01:25
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hide Show timer Statistics
Here's another one I picked off the Beginners forum. It's a straight-forward question, but apart from deriving the answer by brute-force, I want to see if anyone has a more systematic approach. :-D

Trains leave a town B at 3pm and every 10 hours after that. train leave town C at 4pm and every 15 hours after that. if trains follow this schedule beginning on a monday, what is the earliest day on which the trains leave at the same time?



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
BG
Senior Manager
Senior Manager
Joined: 13 Nov 2003
Posts: 357
Own Kudos [?]: 176 [0]
Given Kudos: 0
Location: BULGARIA
Concentration: INSURANCE, RISK MANAGEMENT
 Q49  V38
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 02:53
it seems to me that they will never leave at the same time.Every 30 hours the cycle will repeat and the trains will leave with one hour gap.
User avatar
Folaa3
Senior Manager
Senior Manager
Joined: 27 Dec 2004
Posts: 383
Own Kudos [?]: 108 [0]
Given Kudos: 0
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 05:32
1pm the following monday. they should both leave at the same time
User avatar
700Plus
Manager
Manager
Joined: 27 Jan 2005
Posts: 63
Own Kudos [?]: 2 [0]
Given Kudos: 0
Location: San Jose,USA- India
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 06:45
15x-10y=1
none of x and y will solve it.So will never meet.
User avatar
zombie123
Intern
Intern
Joined: 10 Jun 2005
Posts: 4
Own Kudos [?]: 1 [0]
Given Kudos: 0
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 06:54
I think they wont start at same time as a cycle of 30 hrs is there LCM of 30 and 24(one day) is 120 ie after every 120 hrs ie ( from 150th hour) they will start from thier respective times.
User avatar
zombie123
Intern
Intern
Joined: 10 Jun 2005
Posts: 4
Own Kudos [?]: 1 [0]
Given Kudos: 0
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 07:04
700Plus wrote:
15x-10y=1
none of x and y will solve it.So will never meet.


Could you please elaborate your approach.
And what will be answer if suppose the second train started at 8pm instead of 4 pm ?

Thanks
User avatar
ywilfred
SVP
SVP
Joined: 07 Jul 2004
Posts: 2004
Own Kudos [?]: 1899 [0]
Given Kudos: 0
Location: Singapore
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   23 Jun 2005, 20:33
I went the brute-force way:

Train B
1500, Mon
0100, Tue
1100, Tue
2100, Tue
0700, Wed
1700, Wed
0300, Thu
1300, Thu
2300, Thu
0900, Fri
1900, Fri
0500, Sat
etc

Train C
1600, Mon
0700, Tue
2200, Tue
1300, Wed
0400, Thu
1900, Thu
1000, Fri
0100,
etc

Not very elegant, as you can see, although I arrived at the same answer: The trains will never meet.
avatar
mandy
Manager
Manager
Joined: 30 May 2005
Posts: 151
Own Kudos [?]: 205 [0]
Given Kudos: 0
Send PM
Re: Here's another one I picked off the Beginners forum. It's a [#permalink] New post   24 Jun 2005, 01:21
700Plus wrote:
15x-10y=1
none of x and y will solve it.So will never meet.



:-D 700Plus"
PLZ can you explain how you come to this equation
what x and y stands for why do you substract nd equate to 1

THANKS



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: Here's another one I picked off the Beginners forum. It's a [#permalink]
24 Jun 2005, 01:21
Moderators:
Bunuel
Math Expert
92945 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions