At the morning assembly the hall clock shows 11:15. What time does it appear to show in the dashed mirror?

11:60 - 11:15 = 0:45, which on a clock is 12:45. The minute hand on 3 appears on 9 and the hour hand just after 11 appears just before 1. (1:45 forgets that 0 o'clock is 12; 12:15 keeps the minute hand; 11:45 flips only the minutes.)