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Bloomberg L.P. Financial Applications Engineer Interview Question

I interviewed in New York, NY and was asked:
"My clock is 9 minutes slow every hour. At noon, it tells the correct time. After how many hours will it again tell the correct time?"
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Part of a Financial Applications Engineer Interview Review - one of 1,735 Bloomberg L.P. Interview Reviews

Answers & Comments

of 2
80 hours.
- Anonymous on Mar 1, 2012
of 2
Let us suppose that we have 2 different clocks with the faulty one completing 51 mins in an hour.

-the two clocks will again show the same time when the lag time = 12 hours
for 1 iteration=>lag time =9 mins
for getting a lag time of 12 hours no of iterations needed = 12*60/9=80
one iteration means 1 hour so the next time the clocks will be in sync= 80 hours

time at that point=8:00 PM
- Hardeep on Mar 7, 2012
of 1
if it is analog it takes 40 hours (6 hours late, and 6 hours passed) if it is digital 80 hours.
- ektor on Sep 12, 2012

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