[ Arithmetic. Mental calculation, etc.]

The alarm clock is ahead by 9 minutes per day. When going to bed at 22:00, the exact time was set on it. At what time should the alarm be set so that it rings exactly at 6:00? Explain your answer.
Over 24 hours, the alarm clock gains 9 minutes, so over 8 hours from 22:00 to 06:00, it will gain 3 minutes, meaning at 06:00 it will show 06:03. Therefore, it should be set for this time.

## Answer

for 06:03.