Mathematics · Clocks and Calendars
At what time between 1 o'clock and 2 o'clock will the hands of a clock be at a right angle?
- 11 past 25 9 11 minutes
- 21 past 23 9 11 minutes
- 31 past 21 9 11 minutes✓
- 41 past 27 9 11 minutes
Correct answer
1 past 21 9 11 minutes
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