If the actual time on a clock is 6:00, what will be the time shown in its mirror image?
If the actual time on a clock is 6:00, what will be the time shown in its mirror image?
Subtracting 6:00 from 11:60 gives 5:60, which is the same as 6:00. At exactly 6:00 the hands lie on a straight vertical line, so the mirror image looks identical to the actual time.
Re-check your working by substituting the answer back into the original question.