Question

If buses to a fair leave every 2 hours and the first bus starts at 10:25 am, when will the second bus leave?

Answer 1

Time at which first bus departs = 10:25 am

Since buses leave every 2 hours, the next bus leaves at 10:25 + 02:00 = 12:25
As the time has exceeded the 12 noon mark, so we will call it as 12:25 pm.

We can also express this time in 24-hour format.
Time in 24-hour format will also be 12:25, because the time in 12-hour format is not yet 01:00 pm, and after 1 pm only, we add 12 hours to the time in 12-hour format to convert it into 24-hour format.

[pm is used to describe the second portion of the day, starting from noon right after 12 to just before 12 midnight.]