The clock in the maths department common room is faulty. At twenty past three on Wednesday afternoon it shows 11.25. The clock in fact goes a bit slow and backwards, covering 55 minutes in every hour. What time does it show at twenty past eight on the following Friday morning? The clock has a usual 12 hour dial.

  • $\begingroup$ The problem tells you all you need to know: How fast the clock moves, for how long it moves, and where it begins. So it should be rather straight-forward to find the answer. Where exactly are you stuck? $\endgroup$ – Arthur Mar 17 at 17:04
  • $\begingroup$ I am unsure on where to start $\endgroup$ – user221435 Mar 17 at 17:06
  • $\begingroup$ Look at how much time eclipsed from 3:20 PM Wednesday until 8:20 AM Friday. Then, because the clock moves only 55 minutes per hour, calculate how much time it moved from when it showed 11:25 at 3:20 PM Wednesday $\endgroup$ – Moko19 Apr 2 at 21:11

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