1 Our online Mensa Workout is an intelligence quiz in which you have half an hour to answer 30 questions. 2  The Workout can't be used for qualification to join Mensa, but you can see how well you do! 3  In some countries, a pre-test is available which you can take in the privacy of your home.e offer 2 ways to practise: 1  Our online Mensa Workout is an intelligence quiz in which you have half an hour to answer 30 questions. 2  In some countries, a pre-test is available which you can take in the privacy of your home.