Increasing your aptitude test Score by 50 to 100 Points. Your score can improve dramatically simply by taking the time to become “streetwise” about the aptitude test. Quite simply, this is the easiest step in your test preparation, and should not be ignored under any circumstances. Keep in mind that the aptitude test is a game. Just as in chess, baseball, tennis, or any other sports, those who know how the game is played have a huge advantage over those who are ignorant of the game’s idiosyncratic rules. As a test taker, you should understand the computer-adaptive structure of the aptitude test and how to manage your time wisely.

The computer-adaptive structure of the aptitude test: The computer-adaptive test (CAT) version of the aptitude test is designed to get a more accurate assessment of your skills while asking you fewer questions than its paper-based predecessor did. Here is how it works: the first question you see in any given section will be of average difficulty. If you get the answer right, your next question will be slightly more difficult. If you get the answer wrong, your next question will be slightly easier. The software will also ask you different types of questions in a rather unpredictable order, as determined by its algorithm, rather than clustering question types as the written aptitude test did.

You cannot skip a question or go back to an earlier question. Unlike the paper version, once you click the ‘answer confirm’ box, your answer can not be changed.

How to manage your time wisely

Practice: The main way to develop aptitude test time management skills is to practice taking the test. You will repeatedly see us return to the theme of practice throughout this article. It is very hard to overstate its importance. Therefore you are strongly encouraged to take at least a few mock written aptitude test exams or in the computer-adaptive format and to try to simulate the actual testing environment. (That means refraining from taking food breaks, engaging in telephone conversations, etc. until you have completed a section.)
Spend adequate time on the first 5 questions: Earlier, we discussed how the aptitude test CAT’s underlying algorithm determines the difficulty of questions you are asked, based on your performance in answering previous questions. Difficult questions are weighted more heavily in scoring than easier questions. The first couple questions in any aptitude test CAT section are used to determine the range of questions that the program ‘thinks’ you are able to handle. After you have answered these first few questions, the testing software will give you questions to fine tune your score within that rather narrowly predetermined range. Thus, your answers to the first 5 questions will make a HUGE difference in your final section score.
It is imperative that you answer these pivotal questions with extra care. Always double check your answers to these questions. Verify that the answer choices that you judged to be incorrect are indeed incorrect. If you are unsure of the answer to one of these first questions, at the very least, take a very good educated guess using process of elimination.

source: http://fountainpreps.com/2016/09/06/passing-aptitude-test/