GAMSAT is largely about multiple choice questions (MCQs). So, while the answer sheet is checked by a machine and you need to mark your answers neatly, you are not really being asked to explain your answer as you would be in a personal interview. Aspirants should find answering the MCQs relatively easy because they have had a good deal of exposure to them.
As it is explicitly mentioned, you do not have to explain why you marked a certain answer and left out the others, so, if you begin to guess on every question, you can end up scoring up to 25%. Therefore, do not leave any question unanswered in the test. If you have a few moments before your test ends, go back to the questions you could not answer initially and make guesses.
In MCQs, usually one or all answers would be correct (in which case your best bet is the “All of the above” option). The tests that have only one right answer have multiple incorrect choices that are called distractors. Distractors are difficult to field because they tend to confuse you and prompt you to guess again. So, how do you not let these distractors take the focus away from your answers? Simple, use a ruler or a sheet of blank paper to cover all the answer options for your question and carefully read the question stem itself. This is useful because you are not letting your eye pick out an answer even before you understand how the question is worded.
In most MCQs only one answer is correct and the distractors, though close to the correct answer, are incorrect responses to the question stem. The way to approach this is through a process of elimination. Elimination is important to rule out faulty reasoning. What you must do, therefore, is to look out for subtle differences in the response options keeping in mind the key text that you can deduce from the question stem. Usually you can easily eliminate two choices and remain with two possibly correct options. Carefully read the two choices and look out for possible differences in wording to deduce the right choice. Ensure not to overlook words like “not”, “except”, “least” and in general other negatives so that you are able to pick out the answer that does not belong.
While it is not a good idea to second guess as it leads to confusion, make sure that you read all the options before you finally pick out your answer. Simply because you think the first response option given is the correct answer, and mark it without reading the rest. You might be overlooking the actual correct answer. Once you have thoroughly understood the question, read all the response options. If you are not sure, repose each answer as a true-false proposition and try to find the answer. If you are still stuck, use logic to make your best guess. Remember, nothing ventured, nothing gained. So, even if there is a negative for ever wrong answer and you still do not have a right answer, your best bet is to guess the answer that is closest to the issue raised in the question. Like we mentioned earlier, answering everything based on a guess can still get you 25%. Chances are, if you know most of the other answers, and guess a few, you can still clinch a favourable score.