How many times in a 24-hour period do the display and its reflection give the same time?
Kindly provided by UKMT Beatrix has a 24-hour digital clock on a glass table-top next to her desk. When she looked at the clock at 13:08, she noticed that the reflected display also read 13:08 (as shown above).
How many times in a 24-hour period do the display and its reflection give the same time?
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September 2017
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