Here's another question that caused some debate among the students in one of my lessons. What answer would you choose, and why?
Question statement (true, false or not given?):
Bus drivers do not give change so you must have the correct money for a ticket.
What the passage says:
Buy your bus ticket from the bus driver, with the correct money if possible.
(From Cambridge IELTS 11 (General), test 3, question 10)