How are the scores for Verbal and Quantitative sections of the GMAT exam calculated?

Verbal and Quantitative Sections Scoring

The Verbal and Quantitative section together results in the total GMAT scores which are calculated on the basis of a complex mathematical procedure. The score for both verbal and quantitative section  is based on  the following three factors:

1. Number of questions you answer
2. Whether your answers are correct
3. Difficulty and other parameters of the questions you answered 

A candidate can earn a higher score if they answer a higher number of questions, answer more of them correctly, and qualify for questions of a higher difficulty level. Generally, the test takers will first encounter easy to medium level questions for both verbal and quantitative sections. Upon answering them correctly, candidates are expected to encounter difficult level questions. To achieve a high GMAT score, its very important that candidates encounter difficult level questions and answer them correctly. 

The Score reporting is done in intervals of 1 and the standard error of measurement is 3 points. The total scores are based on your cumulative performance in the Quantitative and Verbal Reasoning sections. The raw calculation then gets converted to a number in the total score range. The scores reporting is done in intervals of 10. The standard error of measurement is 30-40 points. Two-third of the students who are test takers score between 400-600.