For Critical Reading, there are 4 Types of questions:
1. Factual questions will likely be the easiest to answer, but also the most time consuming. Be careful to watch for curveball questions, namely ones that refer you to a specific line of text. You will actually need information from the preceding few sentences in order to answer correctly.
2. Inference questions are not looking for stated facts, but your ability to conclude something from information. They may ask you to make a judgment about the author's opinion, or guess what other conclusions the author might draw. These are usually the hardest.
3. Main idea questions ask you to find the overall theme of the passage, but many have difficulty here. All of your answer choices may have been discussed, but that does not make them the central theme. You can generally eliminate the choices that emphasize factual information. Also, choices that are too narrow or broad are usually incorrect. More likely the answer will be one that contains key words and concepts from the theme presented.
4. Tone questions are ones that ask you to describe the tone of the passage. Remember that tones are more likely to be positive or neutral than negative and science passages are most likely neutral.