Sometimes people read into a question, think that some items are trick questions, or too easy. Instead of it being too easy, it may be that you studied effectively and remember the material well. Anticipate the answer before you look at them. Read over all of your options. Eliminate highly implausible answers.
Some examiners give away answers in their tests.
By answering one question, you may be able to deduce the answer to another. These are usually the wrong answers since there are many exceptions to rules. These are extreme words which are more than likely to be the wrong choice. Many students feel that they should not go back and change their answers. This popular belief is wrong.