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Weekly Problem 25 - 2014

Stage: 3 and 4 Challenge Level: Challenge Level:1

Albert Einstein is experimenting with two unusual clocks which both have 24-hour displays. One clock goes at twice the normal speed. The other clock goes backwards, but at the normal speed. Both clocks show the correct time at 13.00.

At what time do the displays on the clocks next agree?


This problem is taken from the UKMT Mathematical Challenges.

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