GMAT is a computer-adaptive test, it adapts to the performance of the candidate while he is giving the test. The difficulty level of the questions changes based on whether the candidate is answering the questions right or wrong. If the candidate is answering the questions right, the level of the questions will rise, similarly, if the candidate is answering the questions wrong, the candidate will start getting easy questions. Also, as the next question is generated based on the performance in the current question, the candidate cannot visit the previous question. The candidate needs to answer a question about whether he is able to solve it or not in order to move ahead in the exam. If you get an easy question while taking the GMAT exam, you need not panic whether the previous question was correct or incorrect. Instead of wasting your time, you must focus only on solving the current question.