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What is the time difference, in minutes, between Mia's clock and the correct time of midnight on Thursday the same week?

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At midnight on Friday, Mia's clock showed the correct time as 0:00 am.
At midnight on Saturday, her clock showed the time as 11:48 pm.
At midnight on Sunday, her clock showed the time as 11:36 pm.
At 6:00 am on Monday, Mia set her clock so that it showed 6:02 am.
What is the time difference, in minutes, between Mia's clock and the correct time of midnight on Thursday the same week?

posted Dec 1, 2017 by Riteshwar

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1 Answer

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The answer is:

43 minutes

Because:

We know that a day is: 24 hours = 1440 minutes
And we notice that Mary's clock skips 12 minutes every 24 hours.
That means that Mary's clock is 12 / 1440 slower than a normal clock.
From 6:00am on Monday to midnight of thursday, we have 1080 + 1440 + 1440 + 1440 = 5400 minutes
So the difference is 5400 * 12 / 1440 = 45 minutes
We substract the 2 minutes she added, and we get 43 minutes.

answer Dec 27, 2017 by Yasin Hossain Siinan



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