If you're preparing for the exam, I think the important question is: What steps did you take in trying to answer this question?
For this type of question,
you should first attempt an answer based on what you already know. Your next stop should be the
API documentation to research the methods listed as options. And finally, you should write
test code to verify your understanding.
(Also, note that the Math class is included in the 1.4 exam, but not the 1.5 exam.)