One thing that helps in a multiple choice exam and helped me get 100% first try in ATPL flight planning was taking a second to read the question and think about what the answer should be.
Use this information to immediately strike out 1, 2 or even 3 of the answers.
Unfortunately, I don't think the exam structure is now "multi-guess" - you have to physically type the answer into a box - can someone confirm?
When I did it, it was still multi-guess...