Here is a sample mid-term exam so that you can practice for it. The sample mid-term includes a test paper and the associated OpenOffice Calc workbook.
There are buttons that you can use to check the answers in the Workbook but we recommend that you attempt the questions in exam-like condition and only use the buttons to check the answers after the prescribed time has finished. There are no buttons for you to check your answers in the real exams.
A solution will be released later in the week.