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by sridevi » Thu Sep 23, 2010 11:52 pm
the traffic lights at three different road crossings change after every 48 second,72 second and 108 second,respectively.if they all change simultaneously at 8:20:00 hours,they will again change simultaneously at?
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Source: — Problem Solving |

by gmatmachoman » Fri Sep 24, 2010 12:05 am
sridevi wrote:the traffic lights at three different road crossings change after every 48 second,72 second and 108 second,respectively.if they all change simultaneously at 8:20:00 hours,they will again change simultaneously at?
LCM ( 48,72,108) = 432

So the next change will happen after 432 seconds from 8.20 hrs
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by sanju09 » Fri Sep 24, 2010 12:26 am
gmatmachoman wrote:
sridevi wrote:the traffic lights at three different road crossings change after every 48 second,72 second and 108 second,respectively.if they all change simultaneously at 8:20:00 hours,they will again change simultaneously at?
LCM ( 48,72,108) = 432

So the next change will happen after 432 seconds from 8.20 hrs...
...and those 432 seconds, taken as 7 minutes 12 seconds, when added to the clock reading 8 hours 20 minutes 00 seconds, would set the answer as

[spoiler]08:27:12[/spoiler].
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
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by gmatmachoman » Fri Sep 24, 2010 8:23 am
sanju bhai,


I likeeeeeeeeeeee u very much..LOL!! how n ice u r!!
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by sanju09 » Fri Sep 24, 2010 8:54 pm
gmatmachoman wrote:sanju bhai,


I likeeeeeeeeeeee u very much..LOL!! how n ice u r!!
No issues mate, our constitution is also that kind enough now. Take your steps without fear, you daring dear!
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
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by saurabhmahajan » Fri Sep 24, 2010 11:28 pm
gmatmachoman n sanju bhai congratulations to you both.

and they lived happily ever after :-)
Thanks and regards,
Saurabh Mahajan

I can understand you not winning,but i will not forgive you for not trying.
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