True or false.
There are 24 hours in a day.
After 9 o'clock it is 10 o'clock.
After 12 o'clock it is 13 o'clock.
11 o'clock is one hour before 12 o'clock.
One o'clock can be in the morning AND in the afternoon.
8 o'clock is 4 hours before 12 o'clock.