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A clock gains 5% for 3 days and subsequently loses 2% for

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Senior Manager
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A clock gains 5% for 3 days and subsequently loses 2% for [#permalink]  10 Jan 2004, 13:28
A clock gains 5% for 3 days and subsequently loses 2% for the next 7 days. If it was 10 minutes late at 10 A.M. on Monday, what will be the time 10 days from this point?

a. 10:04:24 am
b. 10:14:24 am
c. 9:56:36 am
d. 9:45:36 am

***Bloody marvelous question
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Pls include reasoning along with all answer posts.
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[#permalink]  10 Jan 2004, 14:12
I don't know if this is the correct answer, but I will attempt at an solution,

The correct answer should be (A) 10:04:24am

Assuming the clock gains 5% over a period of 3 days, rather than gaining 5% everyday for a period of 3 days.

5% gain for a period of 3 days (24 x 3 hours) , translates to 3 hours 36 min gain

Since the Clock was late by 10 min on Monday 10:00am the clock time was 9:50am

After three days and gain of 3 hours 36 min, the time would be 1:26pm

Then the clock proceeds to lose 2% for a period of 7 days.
This translates to a loss of 3 hours 21 min and 36 seconds

So, taking 1:26pm as the time after 3 days of gain, after 7 days of loss, the time would be 10:04:24am

I think that (A) is the right answer, but offcourse, I may have made a mistake.
Senior Manager
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Posts: 330
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[#permalink]  10 Jan 2004, 14:18

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Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco

[#permalink] 10 Jan 2004, 14:18
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