Clock: A clock with only dots marking 3, 6, 9 and 12 positions has been kept upside down in front of a mirror. A person reads the time in the reflection as 9.50. What is the actual time?

When a clock with dots marking 3, 6, 9, and 12 is kept upside down in front of a mirror and the reflected time reads 9:50, the actual time can be found by understanding the reflection and inversion.

First, the mirror reflection time is 9:50. The actual time in a mirror can be calculated as 11:60 minus the reflected time. So, 11:60 minus 9:50 equals 2:10.

Accounting for the clock being upside down reverses the hour markings, so the actual time corresponds approximately to 8:40.