The GMAT is a standardized test. Standardized tests by definition are predictable. Knowing the format and structure of the exam and applying certain strategies to address them can significantly increase score levels. The GMAT CAT is called adaptive because the computer assigns questions based on your responses to previous questions. So, if you get the first question right, the second question should be a little harder and if you get the first question wrong, the second question should be a little easier, and so on.
Harder questions generate higher scores and easier questions lower scores.
The earlier questions of a GMAT CAT section are crucial in determining your baseline score, so invest the necessary time to try and answer these questions correctly. You must, however, pace yourself so that you have time to mark an answer for every question in the section. If you get the first few right, expect a very tough question early on. Don t over invest. Strategic guessing is ultra-important.