The following five exercises test your insight in solving administrative problems.

All five exercises are described below. You also have a scrap of paper at your disposal which you may use for each exercise. For exercise 5, however, we would like to see your calculations on your scrap paper; simply filling in your answer sheet is not sufficient for this exercise.
You may note the answers on the answer sheet.
All exercises are marked equally and you may choose the order in which you solve them.
The use of calculators is not accepted.

You have 30 minutes to solve the exercises successfully.