Hi
From what I can see you need two tables. One for exams and one for questions with a 1-many relationship.
Exam Table
ExamID(AutoNumber)
#ofExamTakers
ExamName
Questions Table
QuestionID (AutoNumber)
ExamID (foreign key) (with a one to many relationship)
#ofWrongAnswers
Question
The ExamName and Question field are just to help you keep track of what question of what exam you are looking at.
The form is created through the exam table with a subform for the question.
When creating the report group by ExamID.
This should get you exactly what you asked for.
If you are wanting to keep track over time it would take a couple more fields and another use of a foreign key in a subtable from the questions i.e. QuestionVersionID QuestionID #ofQuestionTakers and #wrongAnswers. You would of course take out the #ofExamTakers out of the ExamTable if you are recording the information by question. The reason not to record the information at the exam level for the number of question takers is because you would be revising each question and adding to or taking out questions according to the results.
Hope this helps
Richard