Hi! Welcome to physics and probability test!
This test is NOT designed to test your knowledge -- all the information that you need to get the right answer is either common knowledge, or given on the bottom of the page. But the test is not easy -- most people I know would not get many the questions right (and I would like to think that most people I know are quite smart), and while questions don't require much knowledge, they do require a lot of thinking (or so I'd hope).
NOTE: This test is utterly and completely unfinished. That means that feedback as to which questions you liked/disliked, or how you think they can be changed, is really appreciated!
And whether you think hints should stay, be made easier, or be removed!