To crack GMAT Reading comprehension questions you have to understand the important Reading comprehension question types that would be tested.There are 6 important question types for Reading Comprehension.
1. Main Idea
"Which of the following best states the central idea of the passage?"
"Which of the following most accurately states the main idea of the passage?"
"Which of the following is the principal topic of the passage?"
"The main topic of the passage is...."
2. Primary Purpose
"The primary purpose of this passage is to..."
"The primary purpose of the passage as a whole is to..."
"The primary focus of this passage is on which of the following?"
"The main concern of the passage is to..."
"In the passage, the author is primarily interested in...."
"The passage is chiefly concerned with..."
3.Title Questions
"Which of the following titles best summarizes the passage as a whole?"
4. Specific Detail or Target questions
"According to the passage,...."
"The passage states that ...."
5. Inference or Assumption Questions
"It can be inferred that the author makes which of the following assumptions?"
"Which is an assumption underlying the last sentence of the passage?"
"Which of the following, if true, would most strengthen the hypothesis mentioned in lines 17-19?"
"With which of the following statements regarding chaos theory would the author be most likely to agree?"
6. Attitude or Tone Questions
"The author's attitude towards Morgan's theory could best be described as one of ..."
7. Organization of the passage questions
"Which of the following best describes the organization of the passage?"
"Which of the following best describes the organization of the first paragraph of the passage?"
"One function of the third paragraph is to...."
Recommended Books
1) The Official Guide for GMAT Review, 12th Edition
2) Reading Comprehension GMAT Strategy Guide 7, Fourth Edition (Manhattan GMAT the new standard)



