3.1 Add hours on a clock (12-hour clock)

This is just one of many possible solutions:

original_time = int(input('Enter a time: '))
hours_to_add = int(input('Enter the number of hours to add: '))
new_time = (original_time + hours_to_add) % 12
if new_time == 0:
  print("The new time is 12 o'clock.")
else:
  print("The new time is " + str(new_time) + " o'clock.")