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lovedesire Ultimate Contributor


Joined: 30 Sep 2008 Posts: 3602
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Location: India
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Posted: Jul 04, 2009 Topic Views : 544 Post subject: iq |
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You have the misfortune to own an unreliable clock.
This one loses exactly 20 minutes every hour.
It is now showing 8.00 am and you know that is was
correct at midnight, when you set it.
The clock stopped 10 hours ago, what is the correct time now..?
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And the ANSWER ..:
10:00pm:
since the clock is losing 20 minutes every hour,
for every real hour that has passed, the clock
will only show 40 minutes.
Since the clock shows 8:00am, we know that 480 clock
minutes have passed.
This therefore equals 720 real minutes and hence 12 hours.
The clock stopped 10 hours ago and so the time must now
be 10.00pm.
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srabon Fun Addict


Joined: 20 May 2008 Posts: 527
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Posted: Jul 04, 2009 Post subject: |
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excellent
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admin Site Admin

Joined: 10 Feb 2007 Posts: 2612
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Posted: Oct 30, 2009 Post subject: |
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interesting mathematical question and answer
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