1500
the letter three and oclock
It is written as 21:45
270 degrees
get yourself a cartesian circle, or just look at one online and translate it from there 3,6,9, and 12 would all be 90 deg increments.
Half past three in the afternoon is written as 3:30 PM. In some contexts, it may also be expressed as 3:30 in the afternoon. If you're using a 24-hour clock, it would be written as 15:30.
the letter three and oclock
5am in the 24-hour clock is 0500 hours.
22:00
change your clock to 2 oclock in the morning and play three games
It is written as 21:45
nine oclock and six oclock
Yes, because "o'clock" is a contraction of "of the clock".
It means right in front of you. When soldiers relate directions to the clock 3 oclock means right, 9 oclock means left 12 oclock means front, and 6 oclock means back.
30 degrees
when the clock strikes 9 oclock
12pm and 12am are the same in 24 hour clock, at 0:00 hours
in mod 12 which is the same as clock time... 6 oclock plus seven = 1 oclock